		Table of Flashgun Data Guide Numbers & Trigger Voltage

Table of Flashgun Data

Guide Numbers & Trigger Voltage

Legal Stuff

The following table is provided as an assistance when buying older flash units. It remains your responsibility to be satisfied that a particular unit will not cause damage before connecting it to a camera. I shall not be responsible for any damage caused by connecting an unsuitable flash unit to your camera or other device.
The tolerance of cameras and other devices to trigger voltage varies between brands and models. If a flash unit or module is intended for particular cameras you are advised not to use it on others, particularly if there is more than one contact in the foot (plus the ground contact).

This list does not include hundreds of very old flash units, which it is safest to assume have high trigger voltages unless shown otherwise. Nor does it include many more modern (late film era & digital era) flash units which generally have low trigger voltages for both technical and legal reasons. The latter usually have multiple contacts and are only suitable for particular cameras anyway.
Unless otherwise stated, TTL modes in this table are of film era type and are not compatible with digital TTL

Index

or scroll down

➡ Boots	➡ Braun	➡ Canon	➡ Carrot	➡ Centon	➡ Chinon	➡ Cobra
➡ Contax	➡ Fujica	➡ Hanimex	➡ Jessop	➡ Metz	➡ Minolta	➡ Miranda
➡ National	➡ Nikon	➡ Nissin	➡ Olympus	➡ Pentax	➡ Prinz	➡ Rollei
➡ Starblitz	➡ Sunpak	➡ Vivitar	➡Yashica

Boots
Boots are a UK high street chemist chain which once sold photo equipment for the point and shoot market, much of it own brand. This included some basic flashguns which may be recognised as re-branded from other makes. Low value in the used market.
Model	Guide No. (metres)	Trigger Voltage	Comments
Photoflash 1600	16	43v	Basic low power unit. Single manual mode. Tilt head.
Photoflash 1700	16	?v	Basic low power unit. Single manual mode. Fixed head. Seems no more powerful than the 1600, but has a sync lead.
Photoflash 18	16	?v	Basic low power unit. Single manual mode. Fixed head. Like the 1700 but a different shape and without the sync lead.
Photoflash 24	24	?v	Single manual mode. Fixed head. Has a sync lead.

Braun
Good quality units, endorsed by Leica at one time. Braun originally made bulb flash units and were manufacturing at least into the 1980s, but are no longer in production. Some later electronic units used a "Special Camera Adaptor" referred to as "SCA", which acted as the unit's foot to suit specific camera brands.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
Hobby	Various	255v	Ancient. Safe to assume that all Hobbys have high voltages	YT
2000/320 BVC	32	7v	One Manual and two Auto modes. Tilt and swivel head.
340 SCA Variozoom	34	5v	Carries Leitz branding
370 BVC	37?	22v	A hammerhead unit
380 BVC	38	12v	A hammerhead unit
400M Logic	40?	8v	A hammerhead unit
460 VCS	46	?v	A hammerhead unit. Trigger volts probably <20v, but check

Canon
Canon have sold flash units to complement their own range of cameras as long ago as bulb units, and up to the present day. Top end units are aimed at the professional market, and entry level ones may be expected to be of a reasonable standard. Many are branded "Speedlite", confusingly similar to Nikon's "Speedlight" brand. A-TTL was Canon's earlier exposure system for film cameras, and E-TTL and E-TTLii are later systems for digital cameras.
Model	Guide No. (metres)	Trigger Voltage	Comments
Speedlite 133D	18	?v	A unit intended to be used with the F-1 (original) camera via a special adaptor ("Flash Coupler L") that detected the focussing distance for certain lenses, providing an early form of exposure automation called the CAT system. Appears to be unrelated to the 133A below.
Speedlite 1xxA Series (Below)	Various	All low voltage?	A series of "Speedlites" with names in the format 1xxA. They were designed to work with Canon A-Series SLR cameras and the New F1. They set the camera aperture automatically. Generally had one Manual and two or three Auto modes.
Speedlite 133A	16	6v	One Manual and two Auto modes. See note above.
Speedlite 155A	16	9v	One Manual and two Auto modes. See note above.
Speedlite 166A	20	9v	One Manual and two Auto modes. See note above.
Speedlite 188A	25	4v	One Manual and two Auto modes. See note above.
Speedlite 199A	30	6v	One Manual and three Auto modes. See note above. Prone to broken feet.
277T	25	5v	Simple low power
300TL	35	5v	Two Manual and TTL modes. Canon say it is exclusively for the T90 camera. Tilt, swivel & zoom head.
300EZ	28	4v	Designed for EOS cameras. Uses A-TTL system
420EZ	36	5v	Designed for EOS cameras. Uses A-TTL system
533G	36	5v	A hammerhead unit
577G	48	5v	A hammerhead unit. Trigger volts probably <20v, but check Tilt but no swivel.
220EX	?	6v	Uses E-TTL system. Very automated. The name implies a guide number, but that is only at its maximum zoom.
380EX	?	6v	Uses E-TTL system. Very automated. The name implies a guide number, but that is only at its maximum zoom.
420EX	?	6v	Uses E-TTL system. Very automated. The name implies a guide number, but that is only at its maximum zoom.
550EX	?	6v	Uses E-TTL system. Very automated. The name implies a guide number, but that is only at its maximum zoom.

Carrot
Carrot are only included because this is probably the silliest photographic brand name ever. It even has a carrot as its logo. The units are almost certainly from another budget maker, re-branded, and worth even less. I have not taken the trouble to identify which.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
200A	?	?	One Manual and two Auto modes. Tilt but no swivel.
660T	24	130v	One Manual and two Auto modes. Tilt but no swivel.	Ind (Scroll down)

Centon
Centon were a company marketing flash units of Far Eastern manufacture. Some units were identical with those of other such companies.
Model	Guide No. (metres)	Trigger Voltage	Comments
MR20 Ringflash	5	5v	Ring flash. One Manual and one Auto mode. Same as Cobra Macroflash, Vivitar Macroflash 5000, and Starblitz 1000-Auto Macro Lite.
FG20	20	275v	One manual and one Auto mode.
FG30	24	200v	One manual and one Auto mode.
FH85	30?	5v	Three Auto modes. Uses dedication module.
FH95	36	5v	Two Auto modes and TTL. Uses dedication module.
FH105D	?	5v	Late film era unit with LCD panel. Uses dedication module.

Chinon
Chinon made film SLRs from about 1971 - 1990. Also made compact cameras, cameras for other brands including Kodak, and components for other companies. They sold own-brand flashguns during their SLR period which all appear to have dedication to their own cameras.
Model	Guide No. (metres)	Trigger Voltage	Comments
Auto S-240	24	5v	Ring flash. One Manual and one Auto mode. Same as Cobra Macroflash, Vivitar Macroflash 5000, and Starblitz 1000-Auto Macro Lite.
S-250 Zoom	20	6v	One manual and one Auto mode.
S-280	28	200v	One manual and two Auto modes.
AF S280 TTL	28	6v	TTL mode only? Dedication to Chinon cameras.
S-300	30?	11v	One manual and three Auto modes.
990 C Pro	32	125v	One manual and two Auto modes. Tilt head.
1090 C Pro	32	180v	One manual and two Auto modes. Tilt head. Like the 990 C Pro plus secondary light.
GS-320	32	9v	Hammerhead. One manual and three Auto modes. Tilt head.

Cobra
Cobra were a company marketing flash units of Far Eastern manufacture. Some units were identical with those of other such companies.
Model	Guide No. (metres)	Trigger Voltage	Comments
Macroflash	5	5v	Ring flash. One Manual and one Auto mode. Same as Centron MR20, Vivitar 5000, and Starblitz 1000-Auto Macro Lite.
Auto 250	24	66v	One manual and three Auto modes.
D400	34	?v	One manual and two Auto and TTL modes.Tilt head. Late film era unit using dedicated hotshoe modules.
440AF	24	4v	Late film era unit using dedicated hotshoe modules.
700AF	32	5v	Hammerhead system using modules for particular cameras. Cobra advise against using it with other cameras.

Contax
Contax were a high quality and prestigious brand, originally German and pitched as a rival to Leica. The brand was revived in 1974 in an alliance with Yashica, effectively becoming the name for Yashica's high end cameras, and the two shared lens mounts and flashgun connections. Contax brand equipment ceased to be produced in 2005.
Model	Guide No. (metres)	Trigger Voltage	Comments
TLA140	14	5v	Fixed head
TLA20	20	5v	Low power, fixed head.Two Manual and TTL modes.
TLA200	20	5v	Fixed head with zoom.
TLA280	28	4v	Tilt and zoom head
TLA30	30	9v	Tilt but no swivel.
TLA360	36	4v	Tilt and zoom head but no swivel.
RTF540	40	6v	Hammerhead. TTL mode. Tilt and swivel head.
TLA480	48	5v	Hammerhead.TTL modes. Tilt swivel and zoom head.

Fujica
Fujifilm are a long-established company making photographic material and equipment to the present day The 35mm SLR film cameras and flashguns were branded as "Fujica" until 1983, after which "Fuji" was used. Production of 35mm film cameras ceased in 1985. For a long time a Fuji speciality has been medium format cameras.
Model	Guide No. (metres)	Trigger Voltage	Comments
Strobe GA	12?	4v	Tilt head. One Manual and two Auto modes.
Auto Strobe AZ	18	?v	Fixed head cuboid. One Manual and one Auto mode - latter possibly TTL. Made specifically for the AX series of cameras introduced 1979. Rare in used market.
Auto Strobe 300X	30	?v	One Manual and three Auto modes. Tilt but no swivel. Made specifically for the AX series of cameras introduced 1979. Rare in used market.

Hanimex
Distributor of photographic equipment branded with the Hanimex name, with some designs shared with other brands. Originated in Australia, owned Vivitar from 1985, absorbed into Fuji in 2005.
Model	Guide No. (metres)	Trigger Voltage	Comments
BX550	30	?v	One Manual and two Auto modes. Tilt head. Also sold as Boots 30AB
TZ1	24	?v	One Manual and two Auto modes. Zoom and tilt head. Uses a dedication module.
TZ1*34	34	Same as TZ1 ?	One Manual and two Auto modes. Zoom and tilt head. Uses a dedication module.
TZ*2	24	255v	One Manual and three Auto modes. Tilt head.
TX325	32?	3v	One Manual and two Auto modes.
TZ325	32	10v	One Manual and two Auto modes.
TZ326	30	As TX325?	Zoom, tilt head but no swivel. Uses a dedication module.
TZ755CP	30	5v	One Manual and two Auto modes. Zoom, tilt and swivel head.
TZ2500	25	5v	Zoom, tilt head but no swivel. Secondary flash in body.
TZ3600	36	5v	Zoom, tilt and swivel head. Secondary flash in body. Dedication switch for Canon, Minolta, Nikon, Olympus, Pentax.
TZ36	36	5v	Hammerhead. One Manual and two Auto modes.
Pro 550	30	234v	Hammerhead. One Manual and two Auto modes.

Jessop
UK chain of photographic dealers offering own-brand accessories. Their flashguns do not fetch high prices in the used market.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
220TBZ	22	210v	One Manual and two Auto modes.
280ABZ	28	> 200v	One Manual and two Auto modes.
300TTL	30	6v	Two Auto and TTL mode. No manual mode but fires full flash in TTL mode if the TTL contact is not connected. Switch on body to select camera dedication. Tilt and swivel head. Secondary flash in body.	PF

Metz
Metz make a variety of products. Their flash units were called Mecablitz and were made from 1952 until around 2021. They have a reputation for quality and robustness, and their large hammerheads were a favourite of press and wedding photographers. Some later models offered camera dedication with "SCA" modules. Unfortunately some later models have trigger voltages close to the 24 volt limit specified for modern cameras. Metz themselves have stated that the 45 CL units are the successors to the 45 CT units with only minor differences, one of which is that the CL units have the standard socket for an external power supply.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
2034BC	34	210v	Ancient design
404	34	80v	Ancient hammerhead
20B3	20	168v	Basic low power unit. Single manual mode.
20B5	20	?v	Basic low power unit. Single manual mode. like the 20B3 but torpedo shaped.
20BC4	20	185v	One Manual and one Auto mode. Like the 20B3 plus the Auto mode.
20BC6	20	5v	One Manual and one Auto mode, like the 20BC4 but torpedo shaped.
23BC4	13	185v	One Manual and one Auto mode. More powerful version of the 20BC4.
28C-2	28	5v	One Manual and three Auto modes. An update of the B series?	YT
28CT5	28	?v	One Manual, three Auto, and TTL modes. Torpedo shaped. "T" means thyristor?
30B3	30	170v	Single manual mode. Like the 20B3 but more powerful
30BCT4	30	172v	One manual and three auto modes. "T" means thyristor?
32CT3	32?	22v	One manual, three Auto and TTL modes. Needs SCA module
32CT4	32?	12v	Hammerhead. One manual and three Auto modes. TTL mode when used with an SCA
32CT7	32	9v	One manual, three Auto and TTL modes. Needs SCA module. Torpedo shaped
32 Z-1	32	4v	One manual and three Auto modes. "Z" means zoom head? Zoom head units are of later design and all seem to have trigger voltages around 5v.
32 Z-2	32	4v	Like a 32 Z-1 but adds TTL mode. Needs SCA module.
32 MZ-3	32	4v	One manual, three Auto and TTL modes. Needs SCA module.
34BCT2	34	215v	Ancient design
36 C-2	36 @85mm	6v	Budget unit. One manual and three auto modes.
40 MZ-2	40	5v	One manual, twelve Auto, and TTL modes. Needs SCA module.
45CT1	45	234v But see comment	Hammerhead. One Manual and five Auto modes It is said that Ser No. 534000 and onwards have a lower voltage
45CL1	45	8v	Hammerhead. One Manual and five Auto modes
45CT3	45	?v *	Hammerhead. Three Manual and six Auto modes. TTL mode when used with an SCA
45CL3	45	?v *	Hammerhead. Three Manual and five Auto modes. TTL mode when used with an SCA
45CT4	45	25v *	Hammerhead. Three Manual, six Auto modes. TTL mode when used with an SCA
45CL4	45	18v *	Hammerhead. Three Manual, six Auto modes. TTL mode when used with an SCA	YT
45CT5	45	16v or 30v *	Hammerhead. One Manual, six Auto modes. TTL mode when used with an SCA.
50MZ-5	50	3v	Hammerhead. One (or more?) Manual, and twelve Auto modes. TTL mode when used with an SCA.
60CT1	60	20v or 30v	Hammerhead. Three Manual (Full, and Winder and Motor Drive modes), and six Auto modes.
60CT2	60	30v	Hammerhead. Three Manual (Full, and Winder and Motor Drive modes), and six Auto modes.
60CT4	60	5v *	Hammerhead. Nine Manual, eight Auto modes. TTL mode when used with an SCA.
* The Metz hammerheads that have a TTL mode must do so via a special sync lead and an SCA (adaptor) on the camera hot shoe. This arrangement also enables viewfinder indications such as Flash Ready. They can be also be used without those facilities with a simpler sync lead connecting to a PC socket. It has been reported that trigger voltages through an SCA are lower than those with the simpler lead; this might explain some inconsistent voltage reports on the same units.

Minolta
Major maker of cameras and accessories until taken over by Sony in 2006. Prior to that Minolta had departed from the standard hot shoe design. Check the hotshoe before you buy a unit.
Model	Guide No. (metres)	Trigger Voltage	Comments
132PX	32	20-30v	Tilt head. TTL mode only.
Auto 200X	20	7v	Two Manual and two Auto modes.
Auto 280PX	28	6v	Two Manual and Minolta film camera TTL. No Auto mode.
Auto 320X	32	10v	Five Manual and three Auto modes.
Auto 360PX	36	10v	Five Manual, three Auto modes and Minolta film camera TTL.
Minolta Program Series	Various	Low voltage	Minolta units with "Program" in the name and with four digit model numbers are of late film era design and have low trigger voltages. They seem to be hard wired for contemporay Minolta cameras and some have the non-standard Minolta hotshoe. Two examples below.
Program 1800AF	18?	2v	Fixed in a Minolta program mode.
Program 5400HS	High, but probably less than 54	5v	Has non-standard shoe, and wireless capability. Meant for Dynax cameras.

Miranda
Miranda was a marketing name for budget photographic equipment sold from about 1981 until 2008 by Dixons, a former UK high street chain selling hobby tech. The name was originally that of a maker of quality 35mm SLRs. Dixons' Miranda gear is common in the used market and does not fetch high prices.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
F-1	16	?v	Basic low power fixed head unit with one Manual and one Auto mode.
400CB	20	?v	One Manual and two Auto modes. Tiltable head.	YT
430TCB	20	?v	One Manual and two Auto modes. Tiltable head. The "T" might mean thyristor.
ZF-3	20	?v	One Manual and two Auto modes. The head zooms but nothing else.
630CD	24	?v	One Manual and two Auto modes. Tiltable head.
700CD	24	?v	One Manual and two Auto modes. Tiltable head.
930TCD	30	?v	One Manual, two Auto, and TTL modes. Tilt and swivel(?) head.

National
Defunct brand, believed to have been made by Panasonic
Model	Guide No. (metres)	Trigger Voltage	Comments
PE-387S	38	8v	Relatively modern with LCD display. Continuous Manual over 5 stop range and Auto modes.
PE-2057	20?	220v
PE-3066G	30	?v	Hammerhead, fixed head. Three Manual and two Auto modes.
PE-3550	35	?v	One Manual and two Auto modes.
PE-480SG	48?	9v	Hammerhead. Three Manual and four Auto modes.

Nikon
An extraordinary number of different flashgun designs to complement their cameras as far back as bulb units, and up to the present day. Top end units are aimed at the professional market, and entry level ones may be expected to be of a reasonable standard. Many are branded "Speedlight", confusingly similar to Canon's "Speedlite" brand. The numbering of the extensive SB series is arbitrary - not related to the order of introduction and certainly not to the Guide Number. Most units have trigger voltages below 30v and many are below 6v. The Nikon F, F2 and F3 cameras had a unique hotshoe for which the feet of some flashguns were designed, or otherwise need an adaptor.
Model	Guide No. (metres)	Trigger Voltage	Comments
SB-7E SB-8E	25	28v	No tilt or swivel. Thinnish cuboid with pivot for landscape or portrait orientation, but ungainly either way. One Manual and two Auto modes. The SB-7E has a standard foot, the SB-8E has a foot for early F-series cameras.
SB-10	25	5v	Very similar to a SB-7E.
SB-11	36	?v	Hammerhead. Tilt but no swivel. One Manual and three Auto modes
SB-14	32	?v	Hammerhead, Tilt and swivel head. One Manual and three Auto modes.
SB-15	25	5v	Cuboid with pivot for landscape or portrait orientation. Tilt but no swivel. One Manual and two Auto modes.
SB-16A SB-16B	32	5v	Tilt, swivel and zoom head. One Manual, two Auto, and TTL modes. Interchangeable feet : Model A was supplied with foot for early F-Series cameras, Model B with a standard foot.
SB-18	20	5v	Basic fixed-head cuboid with one Manual and TTL modes.
SB-19	20	5v	Fixed-head cuboid with two Auto modes, (one allowing a range of apertures with certain cameras).
SB-20	30	6v	Relatively modern design. Tilt and zoom head. five Manual, Auto (allowing a range of apertures with certain cameras), and TTL modes.
SB-21A SB-21B	13/21*	5v	Pseudo-ring flash. Two* manual, and TTL modes. Model A came with a control box with a foot for early F-Series cameras, Model B with a standard foot. * Has two small diagonally opposite flash tubes so not a true ring flash. The two manual powers are by selecting one or both tubes firing.
SB-22	25	6v?	Relatively modern unit. Tilt head. Two Manual, two Auto and TTL modes.
SB-22S	28	6v	Similar to SB-22, but one Manual, four Auto and TTL modes.
SB-23	20	6v	Basic, fixed head. One Manual and TTL modes.
SB-24 SB-25 SB-26	42	6v	Relatively modern and well featured units with LCD panel, detailed differences between them. Tilt, swivel, and zoom head. Modes : Manual variable over seven stops, Auto with aperture choice, and TTL.
SB-27	34	5v	Relatively modern with LCD control panel. Tilt head. Modes : five Manual, four Auto, and TTL modes.
SB-28	42	4v	Relatively modern with LCD control panel. Tilt, swivel, and zoom head. Modes : Seven Manual, Auto with aperture choice, and TTL. DX version for Nikon digital cameras.
SB-29	11	?v	Pseudo-ring flash. Four* manual, and TTL modes. *Has two small diagonally opposite flash tubes so not a true ring flash. Two of the four manual powers are by selecting one rather than both tubes firing.
SB-30	16	5v	Low power. Tilt head. Three Manual, four Auto, and TTL modes.
SB-50DX	26?	6v	Relatively modern, with LCD screen. Tilt and zoom head.
SB-80DX	36 (est)	5v	Relatively modern with LCD screen. Tilt, swivel and zoom head.
SB-400	?	4v	Relatively modern, "steamline" look. Fixed head.
SB-600 SB-700 SB-800 SB-900 & 910	?	<5v	Relatively modern with LCD screen. Tilt, swivel and zoom head. These models have different powers?

Nissin
Company still in business. The only remaining maker of hammerhead units.
Model	Guide No. (metres)	Trigger Voltage	Comments
28TX	28	8v	One Manual and two Auto modes.
280XP	28?	9v	One Manual, two Auto, and TTL modes. Uses camera brand dedicated module.
360TW	36	12v	Three Manual and three Auto modes.
4000GW, 4500GT, 4800GT	Various	< 5v	Hammerheads. Guide No.is first two digits in name. Manual, Auto, and TTL modes. Use camera brand dedicated module on camera hotshoe.

Olympus
The original Olympus company made cameras from 1936 but sold their camera division to JIP in 2020. JIP trades its photo products as OM Digital Solutions, but has been allowed to use the Olympus name on their products for the time being.
Model	Guide No. (metres)	Trigger Voltage	Comments
PS200	14	185v	Ancient low power basic fixed head cuboid with one manual mode.
Quick Auto 310	34	225v	Two manual, three Auto and TTL modes. Pioneer TTL flashgun, common in the used market, but its unique foot contact layout needs a special adaptor for the TTL to work even on the OM-2 camera for which it was designed. Needs retiring to a place of honour in a museum, seriously.
T20	20	8v	Low power fixed head. One manual, two Auto and TTL modes.
T32	32	12v	Tilt head. Two manual, three Auto and TTL modes.
T45	45	?v	Powerful hammerhead. Tilt and swivel head. Six manual, three Auto and film-era TTL modes.
FL40	26	3v	Late film era unit. Tilt and swivel head. One manual, two Auto and film-era TTL modes.

Pentax
Pentax have sold flash units to complement their range of cameras up to the present day. Top end units are aimed at the professional market, and entry level ones are of a reasonable standard, with some exceptions like weak battery door catches. Any model prior to the ones with "AF" in the name are likely to have a high trigger voltage.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
Aurorobo	24	?v	Pre-AF series. One Manual and two Auto modes. Probably high voltage
AF080C	8	?v	Ring flash with Auto, Manual and Pentax film era TTL	PF
AF-100P	10	?v	Low power, fixed head. One Auto mode. Made for the Pentax Auto 110 camera, with a unique foot that fits nothing else.
AF-130P	13	?v	Low power (slightly more than the AF 100P), fixed head. One Auto mode. Made for the Pentax Auto 110 camera, with a unique foot that fits nothing else.
AF-16 & AF160	16	4v	Basic low power unit, one Manual and two Auto modes	PF
AF200S	20	8v	Basic low power unit, one Manual and two Auto modes	PF
AF200SA	20	8v	Like the AF200S but also works with film era Pentax program modes	PF
AF200T	20	8v	Four Manual, two Auto, and Pentax film era TTL	PF
AF220T	20	?v	Pentax film era TTL and no other mode. Useless on other cameras.
AF240Z	24	?v	Designed for Pentax film era program mode
AF240FT	24	?v	Two Manual and Pentax film era TTL modes	PF
AF280T	28	8v	Tilt and swivel head. Two Manual, two Auto, and Pentax film era TTL	PF
AF400T	40	?v	Hammerhead unit. Four Manual, three Auto, and Pentax film era TTL	PF

Philips
Major electrical manufacturer who no longer make photo flash guns
Model	Guide No. (metres)	Trigger Voltage	Comments
32GCT	32	300v!	Hammerhead. Three Manual and three Auto modes.
36CTL	36	6v	Five Manual and five Auto modes.
P536TCL-X	36	?v	Five Manual and three Auto modes. Uses camera brand dedication modules and a generic module was also offered.

Prinz
Another budget brand associated with Dixons, a former UK high street chain selling hobby tech. Not highly valued in the used market.
Model	Guide No. (metres)	Trigger Voltage	Comments
All	Various	See comment ->	All Prinz flash units seem to have trigger voltages > 100v.
Jupiter 177	16	High	Very basic. One low-power manual mode, fixed head. Common in used market, probably the cheapest flashgun you could buy around 1975.
Jupiter 677TCB	20	260v	One manual and two Auto modes. Tilt head.
770C	20	Probably high	One manual and one Auto mode. Fixed head.

Rollei
Maker of quality medium format cameras until they went downhill from 1975-80. Because of the kudos of the name, the flash units are over-priced and made by contractors anyway.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
All	Various	See comment ->	All Rollei flash units seem to have trigger voltages > 100v.
128BC	28	>100v?	One Manual mode. Basic fixed head cuboid.	YT

Starblitz
Mid-range brand of flash units. Some designs are obviously shared with other brands in this part of the market.
Model	Guide No. (metres)	Trigger Voltage	Comments
250 BAZ	20	7v	One Manual, two Auto modes. Zoom head
2000 BTZ	20	250v	One Manual, two Auto modes. Zoom head
3300 DTS	30	12v	One Manual, two Auto modes. Zoom head
3600 DS	36	5v	One Manual, two Auto, and TTL modes. Uses camera brand dedication modules. Zoom head
1000 Macrolite	5	5v	Ring flash. Same as Centon MR20, Cobra Macroflash, and Vivitar Macroflash.

Sunpak
Sunpak have made good quality flash units (and a few other photo accessories) from the early days of electronic flash. The larger units have been aimed at the professional market in which Sunpak were for long the main rival to Metz among independents. The table below covers only some of the units Sunpak have made, omitting most of the early high voltage ones. Some later models (mostly with "DX" in the name and around the 1990s) offered camera dedication with plug-in modules. Sunpak model names are confusing. They re-used some names for different models, and also used different names for the same model. Most names began with the word "Auto" but I have not consistently included it here.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
7R	?	Probably high	Ancient ring flash.
DC3	16	Probably high	Ancient, very basic, low power, one Manual mode only.
Softlite 1400M	14	Probably high	Basic, low power, one Manual mode only. Called "Softlite" because the head tilts.
Softlite 1600M	16	Probably high	Basic, low power, one Manual mode only. Called "Softlite" because the head tilts.
Softlite 2000A	16	210v	One Manual, two Auto modes. Called "Softlite" because the head tilts. Seems with the Softlites "M" meant manual only and "A" meant Manual plus Auto.
MX Series 114 - 134	Various	~ 200v	MX114, MX118 and MX122 are basic cuboid units with fixed heads. MX124, MX130 and MX134 had tilt and swivel heads in a weird Rubic cube style. All have a single manual mode, except MX134 has two. Last two digits in the name are the Guide Number. Numerous in the used market.
Auto Series 114 - 134	Various	~ 200v	Like the preceding MX series of the same numbers, but with the addition of two Auto modes, except the Auto 114 had only one and the Auto 134 had three. Last two digits in the name are the Guide Number	PF
Auto Series 17SR & 20SR	Various	~ 200v	Like the preceding Auto 114 -134 series but with thyristor citcuitry, then a novelty. The number in the name is the Guide Number
Auto Zoom Series 2400 - 5000	Various	> 200v	These did not zoom - maybe it meant the manual power level could be varied. The Autozoom 2400 and 3000 were Rubic cubes like the MX114-134, and the 3075G, 3600, 4000 and 5000 were hammerheads. All had several Auto modes and thyristor circuitry. First two digits in the name are the Guide Number.
Auto Zoom 3600 (& 522?)	36	200v	A hammerhead of the above series. Seven Manual modes and continuous Auto within 4 stop range. Has rotary dials on side of head. Does not zoom. Common in the used market.
GT Series GT8 - GT32	Various	Probably high	There was a GT9, GT11, GT20, GT22, GT32 and a hammerhead GT Pro 4011. The Guide Number is in the name. They seem to have been even earlier than the GX series and had only manual modes.
GX Series GX14 - GX33	Various	~ 200v	Basic cuboid units with a single manual mode. The digits in the name are the Guide Number. Numerous in the used market.
GX8R	8	?v	Ring flash. There has been a report of about 7v for its trigger voltage but treat that with caution as it would be out of line with the others of the GX series.
SP140 - SP240	Various	180v	Very basic fixed head cuboid. Single manual mode only. The digits in the name are the Guide Number. Common in used market.
Auto 140 - Auto 170	Various	172v	Basic fixed head cuboid. One manual and one auto mode. Seem to be the auto equivalents of the SP series. First two digits in the name are the Guide Number. Common in used market.
Auto 200 - Auto 240	Various	205v	Basic fixed head cuboid. One manual and two auto modes. Seem to be the auto equivalents of the SP series. First two digits in the name are the Guide Number. Common in used market.
Auto 222	22	6v	Two manual and two auto modes.
244D	24	8v	One manual, two auto, and TTL modes. Has switch for camera dedication.
266D	24	6v	Like the 244D but with a zoom head.
Auto 26SR	26	6v	Equivalent to a 26DX. Not part of the older Auto 17SR - 134 series above.
331D & 333D	30	5v	333D appears identical to the 30DX below, but without TTL. 331D similar but has only one Manual mode.
383	36	8v	Five manual, three auto, no dedication.
422D	30	12v	Appears identical to the 30DX below
433D	36	8v	Five manual, three auto, and TTL modes. Hard wired camera dedication?
444D & B3600DX	36	12v	Appears identical to the 36DX below
511	30	Probably High	Hammerhead with fixed head. Later generations were better. Seven Manual modes and continuous Auto within 4 stop range.
611	48	Probably High	Hammerhead with fixed head. More powerful version of 511. Eight Manual modes and continuous Auto within 4 stop range.
4205G & 544	42	7v	Large hammerhead. Seven Manual modes and continuous Auto within 4 stop range. Like a larger AutoZoom 3600 but with a low voltage. Shared some accessories with G4500DX below.
G4500 & 455	45	7v	Large hammerhead. One Manual and three Auto modes. Similar to G4500DX below (often confused) but lacking module, TTL or dedication, and should be much cheaper.
DX Series (Below)	Various	Read comment ->	DX Series units were made 1985-2005 and used a plug-in camera dedication module. A generic module was also offered. All except the 24DX and the ring units had swivel and tilt heads. Many had equivalent non-dedicated models. The trigger voltage can depend on the module as well as the flashgun to which it is fitted. As far as I have been able to ascertain, the voltage is the same for all modules on any given flashgun except with a Pentax module in which case it is 5 volts on any DX flashgun. Having said that I have no data for Canon, Hasselblad, Konica or Olympus modules. Link to separate page on Sunpak DX units in the next column -->	Lucan
24DX	24	12v*	Fixed head medium power, two Manual, two Auto, and TTL modes.
26DX	26	6v*	Five Manual, three Auto, and TTL modes. Zoom attachment supplied. Has some features dissimilar from other DX units, including lower trigger voltage
30DX	30	12v*	Five Manual, three Auto, and TTL modes. Optional zoom attachment.
36DX	36	16v*	Five Manual, three Auto, and TTL modes.
DX8R	8	7v*	Ring flash. Five Manual, one Auto, and TTL modes.
DX12R	12	7v*	Ring flash. Five Manual, and TTL modes. The only DX unit with no Auto mode.
G4500DX & 555	45	7v*	Large versatile hammerhead. Seven Manual, seven Auto, and TTL modes. Optional zoom attachments. Sold as G4500DX and 555 in different markets. Not to be confused with the G4500. Special sync lead connected the unit to a dedication module in the camera hotshoe, same module as used by the DX series. There was an alternative non-dedicated sync lead.
622 Pro System	50	8v*	Large versatile system hammerhead. Eight Manual, Auto within a continuous(?) seven stop range, and TTL. Numerous optional plug-in heads, battery pods, power supplies and chargers. Uses the same sync lead arrangements as the G4500DX.
622 Super Pro System	60	8v*	A higher powered version of the 622 Pro System.
Auto Pro 120J TTL	45	12v**	Unusual bare bulb unit. Five Manual, three Auto, and TTL modes. Uses same modules as the DX series.
		* 5v with Pentax module. ** Pro 120J seems to use same body as the 30DX, so probably 5v with Pentax module, but no data.

Vivitar
Vivitar were (until purchase of the brand by Sakar in 2008) a photographic import and marketing company which used contract manufacturers. Some of their equipment was identical except in name to that of other mid-range brands such as Starblitz and Kiron. Vivitar's higher end units aimed at rivalling Metz and Sunpak. Many Vivitar units offer only full power in their manual mode - or need an optional plug-in module for fractional levels.
Model	Guide No. (metres)	Trigger Voltage	Comments	External Reviews ‡
100, 161, 252, 253, 255, 272, 273, Auto215	Various	All > 200v	Old designs. The 283 and 285 of this series survived into later years and are dealt with below.	PF
283	36	600v! 350v or 10v	Long comment because these were the most numerous flash units ever made, partly because they were made for 21 years. It was also revived later (was on sale in 2000) but with poorer quality. Powerful for the price when new and one of the earliest of its type, gaining a cult following despite better later designs. Some are still recommending it in 2022 but if you must have one don't pay much more for it than the postage. Had a reputation for reliability except the feet tend to break. Earlier models had a very high trigger voltage and people have received significant shocks from them; voltage was later reduced with no name change. Tilt but no swivel. One manual and four Auto modes. Fractional manual control requires a different control module to be plugged in. Unless you are expert at serial numbers, best avoided in case you get an earlier high voltage one or later low quality one.	PF YT YT
285	36	350v	An improved version of the 283: zoom head and eliminates the need for separate Auto and Manual controllers. But lacks the 283's external power supply socket.
285HV	36	12v	A further improved version of the 283/285: this restored the external power supply socket and reduced the trigger voltage. "HV" refers to the optional external power supply, not that it has a high trigger voltage. Like the 283, the later versions were of poorer quality.	PF YT
365	48	48v	Hammerhead. Uses sensor on camera hotshoe. Several Auto modes but only one manual unless you fit an extra control module - like the 283.
28FD & 550FD	24	10v	One Manual, two Auto, and TTL modes. Different versions for different camera brands.	PF
1900, 2000, 2600, 2800	Various	All > 100v	Old designs. Vivitar seem to have started reducing their voltages a bit from their 200 series, perhaps because of people getting belted by the previous > 200v.	PF YT
2800-D & 28-D	24	> 100v ?	Tilt head. One Manual and two Auto modes. Has different dedication versions.	PF
628AF	28	< 7v	Late film era unit, seem to be TTL only (which Vivitar call Auto); must have been relatively cheap to make. Controlled from the camera, hard-wired for brand dedication. A third letter indicates the camera brand, eg 628AFC means Canon
728AF, 730AF, 736AF	Various	< 7v	Late film era units. Seem to be TTL only (which Vivitar call Auto) so relatively cheap to make. Controlled from the camera, hard-wired for brand dedication. A third letter indicates the camera brand, eg 728AFC means Canon
Series 1 600	36	9v	Zoom head. One Manual, two Auto and TTL. Switch for camera dedication. Vivitar Series 1 units were all late film era so all are likely to have low trigger voltages.
3500	24	10v	One manual, three Auto and TTL modes, using camera dedication modules.
4600	30	20v	One manual, three Auto and TTL modes, using camera dedication modules.
5200	30	20v	Four manual, [some] Auto and TTL modes, using camera dedication modules. LCD panel.
Macroflash 5000	5	5v	Ring flash. Same as Centon MR20, Cobra Macroflash, and Starblitz Macrolite.	PF

Yashica
Yashica made a variety of cameras and flashguns until 2005. From 1974 they had an alliance with the Contax brand and shared lens mount and flashgun connections. In 2008 the name was sold by its parent company to another that marketed electronic items, and this then produced a cheap and poor quality "Yashica Y35" digital camera which bears no relation to the original Yashica cameras.
Model	Guide No. (metres)	Trigger Voltage	Comments
CS-10, CS-12, CS-14 CS-15, CS-20	As in name	>200v	All fixed head.
CS-110 AF Auto	11	?v	Fixed head
CS-140	14	5v	Fixed head
CS-200 AF Auto	20	?v	Fixed head
CS-201 Auto	20	12v	Fixed head
CS-202 Auto	20	11v	Fixed head
CS-203 Auto	20	12v	Fixed head
CS-204 Auto	20	11v	Tilt head
CS-220 Auto	22	11v	Tilt head
CS-220W Super	22	9v	Tilt and swivel head
CS-221 Auto	22	5v	Tilt head
CS-240 Auto	24	8v	Tilt and swivel head. TTL mode.
CS-250 AF	32	5v	Tilt, swivel and zoom head. TTL mode.

‡ External reviews open in a new tab. Some abbreviations are used including YT (YouTube), PF (Pentax Forums - which has many reviews including of non-Pentax acessories), and Ind (independent).