| Flash Photography ~ History & ILFORD Flashguns |
| Magnesium Ribbon ~ History | |
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The earliest flash photography used magnesium ribbon or powder, ignited on a tray, to provide a brief flash of bright light, for about 1/10th of a second. The technique was not without its obvious dangers and it also released a lot of smoke, smell and a fall-out of white ash. Flash pictures had to be taken by mounting the camera on a tripod, opening the shutter, igniting the ribbon or powder, and then reclosing the shutter. The advert (left) was taken from Amateur Photographer magazine for 30th November 1949, showing how the technique, albeit using flash powder (see below), was still in use up to the 1950s. The Amateur Photographer & Cinematographer magazine for November 27th 1935 contains an interesting article (p508 'Topics of the Week') entitled "Magnesium Ribbon, Age 72 Years" (meaning 1863). The article reads: |
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"Now that so many photographers can take portraits at night by the aid of artificial light, thanks mainly to improved sensitive materials and electric lighting, a correspondent recalls the fact that one day this week is the seventy-second anniversary of the introduction of magnesium ribbon or wire. In 1863 the manufacture of magnesium was commenced in Manchester, and during the last week of November of that year, at a Manchester scientific society, Professor H.E.Roscoe exhibited the light emitted by burning a piece of magnesium ribbon or wire 1mm in diameter and 10ft long. Mr.A.Brothers, who was at the meeting, secured a piece of the wire and a few days later reported some experiments he had made with it, chief of which was the copying of an engraving by the light given out by the wire. At that time the price of the wire was half-a-crown (i.e. 2s.6d; 12.5new pence) per foot, and only small quantities were obtainable. 'To-day' (1935) it is from 1s. 9d. to 2s. per ounce. Early in 1864, three photographers working together managed to get a good negative in the Blue John Mine in Derbyshire by the light from magnesium, and in May of the same year it was used to make a portrait of Dr.Faraday at the Royal Institution in London. Since these historical initial efforts, magnesium in the form of wire or powder has been widely used by photographers. The use of flash powder, based upon magnesium, continued in use to (at least) the mid-1950s, because early flash bulbs (c1930 and onwards) were prohibitively expensive for many amateurs. |
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| Flash Powder | ||
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Kevin MacDonnell, in Photography magazine for January 1981, describes using flash powder "...an explosive mixture of magnesium powder, potassium chlorate and antimony sulphide, which scared me stiff no matter how often I used it." He continued "Supplied in two bottles, the technique was to first of all pour some of the magnesium powder from its container onto a folded sheet of paper. You then replaced the cork tightly in the bottle and put it well to one side. Next you poured some of the 'igniting compound', consisting of the other two chemicals, out of their bottle onto the magnesium lying on the paper and again replaced the cork tightly. The two powders were then shaken together gently. Now came the exciting part ! You had a flashgun complete with a metal tray with a handle and some form of ignition. The one I used had a hammer like that of a shotgun which, when released, fell on a huge explosive cap, while another worked like an old wheel lock pistol, a spring driven steel wheel revolving against a flint. You cocked the flashgun, poured the contents of the folded paper onto the tray, held the gun above your head, uncapped the lens, uttered a short but devout prayer and pulled the trigger. If all went well a sheet of white flame was produced, varying in height from 6" to a foot (12" = 300mm), depending upon the amount of powder. If you were unlucky, however, one of two things could happen. In damp or humid weather, of if the bottles had not been tightly corked, the powder could 'cake' and then, instead of a flash, you got a genuine explosion like that of a small hand grenade which, if you had been generous with the amount of powder, could blow off your fingers! Alternatively, when you pressed the trigger nothing at all happened and the natural reaction was to lower the gun and look into the tray. The action would disturb the powder and it could go off as you looked at it. Everyone had some horrifying story to tell about flash powder." Paul Godfrey has sent me an extract about flash powder from an ancient edition of "The ILFORD Manual of Photography", numbered the 310,000th copy (a number which suggests it was published around the mid-1920s). The extract can be read here. ALSO, an extract from a Kodak Magazine dated November 1926 (being a complimentary copy from Wallace Heaton) that has an article about flash photograph. Paul scanned this article from a magazine owned by Jim Fisk. |
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Thanks to Brian Rees, I now have experience of using flash powder. Brian donated the 4oz tin of Johnson(s of Hendon) No.2 FlashPowder shown alongside. The original instructions for using the No.2 FlashPowder can be viewed here. An experiment to see if the powder would still produce a FLASH is described here. Paul Godfrey describes his experiences with a Johnsons flash powder 'flashlamp' (identical to the Magney Powder Flashgun shown at the top of this page) and some 'do-it-yourself' flashpowder here. Johnson's Flashpowder adverts, scanned by Paul from 1930s AP magazines can be viewed here. |
As supplied, the 3 items were all packed inside the large tin. |
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Johnsons apparently sold flash powder until the mid-1960s, evidenced by the tin (above) carrying instructions which refer to Johnsons' Solufin developer, which itself wasn't marketed until the autumn of 1964. However, adverts for flash powder are scarce after the mid-1950s. |
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With reference to the picture above, right, the smaller tin contained a white powder and the large tin contained a dark grey/purple powder. Strips of white 'touch-paper' were contained in the small brown envelope. Despite its claimed non-deliquescent properties, over the 40+years since the mixture was manufactured the grey powder (especially) had caked into a firm mass but could still be crumbled into fine particles. Johnsons supplied two types of flash powder. The No.1 was called Professional and gave a flash of very high actinic value with a minimum of smoke and dust, a combination claimed to make it more suitable for use in banquets and theatrical parties and for large groups and interiors. It was sold in 1oz, 4oz and 8oz bottles, priced 3s.9d (19p), 9s (45p) and 14s.3d (71p) respectively. The No.2 was recommended for amateur use, and in all circumstances where the smoke produced would not be judged unacceptable e.g. outdoors using a small charge of Flashpowder to augment daylight or inside factories. This flash powder was supplied in 1oz, 4oz (see above) and 8oz tins, priced 3s (15p), 7s.6d (38p) and 13s.6d (68p) respectively. |
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Flash Bulbs ~ History I understand from Brian Wilkinson (PCCGB Member) that the modern form of Flash Bulb was patented in 1925 by Dr Paul Vierkotter in Germany, though flash bulbs using magnesium ribbon date back to around 1900. Amateur Photographer magazine for 10th September 1930 contains a report (page 244) on the 'Sashalite' flashbulb (see below) and adds: "Judging from the information
given, the 'Sashalite' is strongly reminiscent of a lamp invented
about 1900 by Mr.Smith of the Platinotype Co. An improved
form, specially adapted for studio portraiture, was fully illustrated
and described in the issue of "Photography" for March
7th, 1901, page 180. The Amateur Photographer magazine
for 10th September 1930 (as referenced above) has this to say
about the 'Sashalite': Michael Langford in his book "The Story of Photography" agrees with the date of 1925 for the arrival of 'modern' flashbulbs, though Brian Coe and Paul Gates in their excellent book "The Snapshot Photograph - The rise of Popular Photography, 1888-1939" (ISBN 004069 14 1) tells us that the flashbulb was a development of the 1930s (probably referring to a time when flash bulbs became mass produced and entered general usage). Flash bulbs were relatively expensive for the first two or more decades of their mass availability. It wasn't until the introduction of small capless bulbs in 1955 that their cost became acceptable to most ordinary amateurs. Hence the continued use of flash powder into the 1950s. In the 'Readers Write' section
of Amateur Photographer magazine for 2nd February 1966, a Mr.D.S.Smith
admonishes a Mr.M.Russell for complaining that flash costs were
still high in 1966 at 9d (4p) per bulb. Mr Smith writes: A Kobold advertisement in the February 1959 edition of PhotoGuide Magazine, claimed that in 1958 ~ 10,000,000 flash bulbs were used in Britain and 800,000,000 in the USA. Various metals were used to
provide the 'flash' in flash bulbs. According to "Artificial
Light and Photography" by Riek and Verbeek (Philips Technical
Library), the light output from various metals, expressed in
lumens per milligram, are: |
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Flash Synchronisation By the late 1930s manufacturers began to incorporate flash synchronisation into their cameras. Brian Coe & Paul Gates suggest "the first mass produced camera with this facility being the Falcon Press Flash in 1939. Other early flash cameras were the Agfa Shur-Flash and the Kodak Six-20 Flash Brownie box camera, both of 1940." Brian Wilkinson adds the Kine Exakta of 1936 to this list. Post-WW2, over the next 10 years, it became the 'norm' for cameras to be equipped with flash synchronised shutters and the retro-fitting of such a facility to non-synchronised shutters was also available e.g. Wallace Heaton charged £4 in October 1952 and this cost had fallen to 'only' £2.18s (£2.90p) 'for most shutters' by December 1954. Alternatively, it was possible to fit an attachment to the cable release socket which fired the shutter and the flashgun together. However, the (subsequently universal) 3mm (1/8") coaxial plug didn't become the UK standard means of attaching a flashgun until perhaps the mid-1950s. Even then, simple box cameras continued to use proprietary plug fittings into the early 1960s. The German camera industry standardised on the 3mm coaxial plug rather earlier, no doubt influenced by the Zeiss organisation with its shares in both Gauthier & Compur shutters. The BJPA for 1953 describes a new range of Gauthier shutters, the 'Vario', 'Pronto', 'Prontor-S' and 'Prontor SV', all fitted with a 3mm coaxial flash synchronisation socket. The Synchro-Compur shutter of 1951 also featured this synchronisation connector. |
![]() It's probable that
before 1953 the Prontor and Compur had different flash connectors,
as flash leads for these two shutters in 1951 adverts are listed
separately (see below). Perhaps the earlier Gauthier (Prontor)
version was as on this pre-1950 Agfa Jsolette (Isolette) - the
camera predates the fitting of an accessory shoe. Although at
first glance it looks to be a normal 3mm coaxial, in fact it
is slightly shorter and is of larger diameter near the base.
A standard 3mm flash lead will not fit. |
By 1953 Zeiss had standardised on the
3mm coaxial connector and this became known as the 'PC' flash
connector, standing for Prontor-Compur. Here is one on a Prontor
SVS shutter fitted to a Zeiss Nettar with f4.5 Novar lens. |
| Until the mid-1950s British built flashguns (especially) were made with the flash lead interchangeable, or at least specifiable on purchase. In Amateur Photographer magazine for March 7th 1951 issue there is a Bennett advertisement for flash leads; Selfix flash lead 7s/6d (37.5p), Compur flash lead 7s/6d, Robot flash lead 12s/6d (62.5p) and Prontor flash lead 12s/6d (postage 6d extra; 2.5p). The Ilford Advocate camera was sold complete with a flash lead fitted with the appropriate 2pin male plug (to fit the 2-pin female socket on the camera itself). |
| In AP for January 31st 1951 an Agilux flashgun featured in a Sands Hunter advert is described as having a 2-pin flash connector lead. Adapters for other shutter synchronisation connectors are listed separately; for an Epsilon shutter 7s/2d (36p), for a Prontor shutter 9s/2d (46p) and a Compur shutter 9s/2d. Its probable that the adapter for an Epsilon shutter is the same as was meant by a Selfix flash lead in the Bennet advert (above) as Ensign Selfix cameras used Epsilon shutters. |
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The A.S.A bayonet was (?) as illustrated left, fitted to a Kodak Dakon shutter on a Six-20 Folding Brownie, made in Gt.Britain between 1948 and 1954. |
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Flashgun leads were also available
to wire into a flashgun circuit and so change its shutter fitting.
Leads to convert to: |
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The Ilford booklet advertising "Photographic Materials & Accessories" (around 1955) from which the advert below is taken, illustrates and describes three flashguns capable of attaching to a synchronised shutter, the Envoy 'Minor', the Envoy 'Major' and the Envoy 'Zing'. "The type of camera connection lead required i.e. Compur, B.S.S. (a 2-pin female to fit the Ilford Envoy) or Ilford (2-pin male, to fit the Ilford Advocate and Craftsman), should be stated when ordering." The Standard fitting on an Envoy Flash Gun lead was the female Envoy 2-pin (as picture, above). |
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The BJPA 1955 review (pages 228-229) of the Envoy Major
and Envoy Minor flashguns read: These two flashguns are of exactly similar outward appearance, the difference between them being simply that the Major is of the battery-capacitor type and the Minor is a straight-forward battery-powered gun. The body of the guns is a reasonably compact and rectangular black plastic moulding carrying the 5in. reflector on its front face. The size of the body is 3½ x 2¾ x 1.375in, and in the case of the Minor gun this just comfortably holds the 4½volt flat torch battery. The reflector is removable and is held in place on the front of the battery casing by a bayonet fitting. The guns are designed to accept only flashbulbs with an ASCC cap, and no bulb ejector is fitted. The camera bracket is a light-alloy strip which has turned over edges as stiffening, and three camera-fixing screw positions are provided, the farthest from the battery casing giving a separation of 3¾in. A 9in. connecting lead is fitted, and this is supplied with either a 3mm co-axial connector or a B.S.S. 2pin socket. In the case of the Minor gun sent for review, the lead is not secured to the battery casing except at the point at which it makes contact by being clamped under a brass strip. In view of the light gauge of the conductor it would seem preferable to have a more secure clamp for the connecting cable, since as it stands a very light pull is liable to pull the connecting lead away from its anchorage. An open-flash button is provided on the top of the battery casing, and the Minor may be converted into the Major gun by the addition of a capacitor unit which costs 11s. 3d. The price of the Minor gun is 15s. 0d. plus 4s. 11d. purchase tax. and the Major costs £1 1s. 0d. plus 6s. 10d. purchase tax. |
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The Envoy 'Zing' flashgun advert
specifies "A battery is not supplied, and flash leads
are extra." There are also two flashguns for 'Open Flash' photography, where the shutter is opened on B(ulb), the flash is fired and then the shutter is closed. This facilitated flash photography for those with a camera that didn't have a flash synchronised shutter. Ilford also distributed three electronic flashguns, manufactured by Clive Courtenay & Co. Ltd; of Horsham Road, Dorking, Surry. They are the 'Cub' at £15.15s.6d, batteries extra (£15.78p), the 'Litepak' at £21.6s.4d without batteries (£21.32p) and the 'Courier' Mark II, priced from £30.9s (£30.45p) to £41.19s.9d (£41.99p). By the second half of the 1950s it seems even British flashgun manufacturers conceded that the German DIN 3mm coaxial PC lead was standard and units with other connectors disappeared. |
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It comprises a black plastic
battery case, a white reflector and a diffusing cover (missing)
and cost 6s/6d (33p). The battery would have been pressed through
a hole in the base. When the terminals on the battery and bulb
touched together, the bulb fired. It used bulbs having ASCC bayonet
caps and required a GEC BA 6115 Photoflash Cell battery, price
9d (4p). The original instructions,
dating from late 1956 (date code M56) can be read as a pdf file
here. |
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Ilford brought out two flashguns contemporary with their Sportsman & Sporti camera range. The Sportslite instructions suggest March 1959 (coincident with the Style 2 Sportsman) - my thanks to Peter Williams for this date information. Both flashguns are included in Amateur Photographer's 'Lighting & Flash Guide' October 1960, which suggest they were contemporary; the advert (left) is dated 5th October 1960. Simon Cooper has e-mailed to tell me his Sportilux instruction leaflet has 'A61' as a footnote, indicating it wasn't printed until January 1961. But this might simply be that the original leaflet got reprinted. Both take 'capless' bulbs, as introduced in 1955 e.g the Philips P.F.1 (8d each =3p) and the blue (for daylight balanced colour slide film) P.F.1B (9d each =4p). |
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The Ilford Sportilux was perhaps intended to compliment the simpler Sporti camera range. It has a non-folding reflector, but nontheless has a compact shape. With its simpler construction it was of lower cost than the Sportslite, £1.2s.6d =£1.13p including a zip-fastened case. It takes a 22.5v B122 battery. For calculating the exposure, the instructions direct the user to 'the handy exposure guide printed on the flashgun carton'. |
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To insert the 22.5v B122 battery the Sportilux reflector is twisted slightly anti-clockwise so that it can be removed from the central bulb holder. The battery plus & minus contacts must then be orientated to match + / - marks moulded into the plastic beneath the capacitor. The flash connector plug is a PC (Prontor Compur) which was standard by 1960. |
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The Sportslite has an unusual folding reflector which extends out of the central 'stem' when the surround to the bulb socket is rotated. The mechanism is constructed on similar principles to a lens iris diaphragm. In October 1960 it cost £1.18s.10d = £1.94p in a zipped case (excluding the battery). This flashgun runs off a 22.5v B122 battery (see below). It has 'push-button bulb ejection' and is "supplied with 10 inches of cable with co-axial plug." A useful flash exposure guide is moulded into the cream plastic body. |
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The back of the casing clips in and gives immediate access to the battery (22½volt B122 type) and capacitor (100 mfd)-both units merely being slipped between strong spring terminals permanently marked for polarity. A 9in lead with integral co-axial plug, a moulded plastic accessory foot and a push-button bulb ejector complete the casing equipment. A table showing aperture settings at various distances for PF1 and PF5 bulbs used with Ilford FP3, HP3 and Colour F films is moulded on the back of the lid. Coming to the reflector, this
is best described by comparing it with the iris diaphragm of
a lens, with the action from the centre instead of from the perimeter.
It is made up from eight crescent-shaped stainless steel leaves
and an inner disc bearing two projections. A few degrees clockwise
turn of the disc by means of the projections opens the reflector
up to a 3¾in diameter cup of about ¾in depth; the
reverse action closes it. It would be difficult to imagine a
neater or quicker action than this, and in its closed position
the reflector is well protected by the plastic disc already mentioned. |
| Subsequent to the Sportslite and Sportilux, Ilford marketed two flashguns called the Ilfolite and the Ilfolux. The Ilfolite was introduced in December 1963 (the instruction leaflet has J63, meaning 10th month of 1963, printed on its last page - my thanks to David Muggleton for this information), while the Ilfolux instructions have a last page footnote A64, suggesting that the Ilfolux was introduced by the start of spring 1964 (my thanks to Peter Williams for this information). Both took a B154 (15v) battery which is smaller (see below) than the previous B122 (22.5v) and its likely that Ilford took advantage of the availability of the smaller B154 battery to redesign their Sportslite and Sportilux flashguns and make them physically more compact. |
The Ilfolite was of small size with a fold down 2" x 2" dimpled reflector, that gave it compact dimensions when not in use. It took both PF and AG bulbs and cost 24s/6d=£1.23p in Nov.1967; believed to increase to 35s.9d=£1.79p during the next 2years. The rear of the flashgun has an exposure calculator based upon the Guide No. principle. |
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The second picture shows the Ilfolite with the lower front cover removed, showing the smaller (than the B122) B154 15volt battery and the capacitor circuit which had become a standard feature of most all flashguns by this date. It ensured more certain firing of the flashbulb. |
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The Ilfolux was a compact capacitor circuit flashgun and included a built-in test lamp. It had a rotary exposure calculator on the rear, calibrated in ASA and DIN film speeds. The 'iris' type reflector, which opens out by a small twist of the central disc surrounding the bulb fitting, is reminiscent of the Sportslite. It opens to 3.75" (95mm) diameter. When closed, the reflector is 2.6" (66mm) diameter. The overall size of the folded unit is 3.5"x2.6"x1.3", fitting into a plastic 'zip up' case. It was priced at £1.17s.6d. (£1.88). My thanks to Peter Williams for information on the Ilfolux. |
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The Ilfolux box and instruction leaflet. On the end flap of the box it reads 'Made in Western Germany'. Ilfolux with its reflector closed, ready for packing away into its plastic zip-up case. |
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Inside the Ilfolux after the rear clip-on cover (see right) has been prised off. |
The battery is a 15Volt Ever Ready type B154 (see below). The capacitor is rated at 150µF. At the top of the enclosure, above the flashbulb socket, is a test lamp, being an ordinary torch type screw fitting bulb rated at 3.8Volt, 0.07Amp. A small white sprung press button, to the right of the bulb in the picture, closes the test circuit. A 2,000ohm resistor limits the current flow through the flash bulb during charging of the capacitor but enables the test bulb to glow visibly through the small green plastic 'dome' on top of the enclosure. When the camera shutter is fired, the full 15Volt potential is available via the capacitor to fire the flash bulb. Right is shown the flash exposure calculator on the rear of the Ilfolux. By setting the arrow to point to the film speed e.g. 100ASA, the correct aperture can be read off for a range of distances e.g f8 at 3m. The same Guide No. (approx. 24 in metres with 100ASA film) is applied to AG1, PF1 and PFB bulbs. |
Rear clip-on cover with exposure calculator. |
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to the newer AG fitting (introduced in 1959, above right, also see below) |
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PF1 capless bulbs - clear colour as
originally advised for monochrome & colour negative, PF1B
blue (as shown here) for daylight balanced reversal colour film.
Eventually, the PF1B became 'universal'.This capless design of bulb was introduced by Philips in 1955. Their size is some 16mm diameter x 45mm long, giving 7500 lumens seconds of light. Their suggested Guide Number was 130 in feet, 40 in metres, for ISO 100 film @ 1/30sec (in practice, the G.No depends upon the size & directional effect of the reflector, plus the shutter speed & its synchronisation, X or M, so the suggested figure is likely a maximum). Although really standing for PhotoFlux, Philips referred to 'PF' in their adverts as also meaning 'Perfection in Flash'. |
AG miniature capless flashbulbs, enabling
even more compact flashguns. This design of bulb was introduced
in 1959. Their size is some 12mm diameter x 34mm long. The
AG1B (blue) produced 5500 lumen seconds of light; Guide Number
of 110 in feet, 33 in metres, for ISO 100 film @ 1/30sec. This
was largely superceded by the AG3B (as the pack illustrated)
which gave out 7500 lumens seconds, the same as a blue PF1B and
the same as the original clear AG1. |
![]() The batteries used in these flashguns; B122 of 22.5volt and B154 of 15volt. The B122 is still available as an Energizer 412 from The Small Battery Company or from Vintage Cameras Ltd. The B154 is still available as an alkaline equivalent, type A220. |
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When Ilford introduced the Sportina Rapid camera range in 1965 they introduced a complimentary styled flashgun especially for this camera. |
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By the time of the October 1969 AP 'Lighting & Flash Guide', none of the above flashguns are listed. Ilford are only promoting the miniature Ilfoflash to compliment their Ilfomatic cameras, or those Ilfomatics without in-built flash facility, namely the Ilfomatic Compact and Universal 50. It was made in Macau (a Portugese colony at the time of the Ilfoflash manufacture, west of Hong Kong, but returned to Chinese rule in Dec 1999). The Ilfoflash is barely 60mm tall, including its attachment 'shoe' which has a centre electrical contact (hot shoe). The Ilfoflash width is some 40mm and its depth some 25mm. It takes AG type miniature flashbulbs. The battery is a 15v Ever Ready B154 or similar and fires bulbs via a capacitor circuit. The battery is accessible by prising off the front reflector. It cost 17s.9d (89p) in 1969 (or 13s.9d=69p in Nov.1967). The box in the photographs (left) is marked 16s.4d (81.5p). On the rear of the gun is a simple flash exposure calculator for AG1B bulbs. The black disc above the calculator table is the bulb eject button. |
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The electronic flash tube and reflector were housed in the top of the camera and the 'flash ready' light was visible in the viewfinder as well as on top of the camera. The 'quickly detachable' pistol grip housed the batteries and capacitor. The Guide Number was 60 with 50ASA colour film. The user had only to set the camera-subject distance and the correct aperture was set automatically. The lens was a Lanthar f2.8 50mm in a Prontor 250 shutter. Price in 1965, including batteries, was £57.5s.1d (£57.25p), ever ready case another £5.5s.3d (£5.26p). |
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