The Corfield company started just after WWII by two brothers as a small family company, initially in their own home in Wolverhampton! Their first product was an exposure meter for photographic enlargers, the Lumimeter, followed by several other accessories. The success of these and the talent of the Corfield brothers for design and marketing let to the development of their first camera, the 35mm Periflex with Leica screw mount. This compatibility with the Leica was a genius move as it allowed people to use the many accessories that were made for that system and were easily available.
As the name indicated, the Periflex had a unique design feature: a small periscope that could be lowered in-between the focal plane shutter and the lens, and was used to focus the image. Unlike a true SLR, however, the image still needed to be composed using an additional viewfinder. Corfield also produced a 50mm lens, the Lumar, in collaboration with the British Optical Lens Co. As lens and body were made of aluminium, the camera was surprisingly light for its size. The build quality was not quite up to the Leica standard but it was a very capable and successful camera indeed.
Black-painted version of the Corfield Periflex with matching Lumar 50mm f/3.5 lens probabaly from late 1953, the year the Periflex was introduced. This is an early version with shutter speeds engraved in the top plate.
Top view of the black Periflex. By looking down the small eye piece of the periscope finder with the periscope pushed down, one would see an enlarged image of the subject on the focussing screen, allowing the lens to be properly focussed.
The earliest Periflex production had brown pigskin covering, but was soon replaced by black leather. Around 1955 the black top and bottom plates of the Periflex were replaced by silver-coloured ones, whereas the lens barrel was redesigned and received leather strips for improved grip and was renamed Lumar-X.
The benefit of the periscope focusing aid was that any lens that could be mounted onto the camera could be used and properly focussed. As the Corfield lenses had no rangefinder coupling, the reverse was not true, when using these lenses on other Leica screw mount cameras one will have to rely on the distance markings on the lens.
Camera handling was a little slower than most Leica copies. Winding the camera required two actions: the film was forwarded with the wind knob, then the shutter was cocked separately by turning the shutter speed knob. Similarly, focussing and framing the shot were done separately with the periscope and viewfinder, respectively, which required a change in position of the camera, as one would look down through the periscope, whereas the viewfinder was of course horizontal.
Last version of the first Corfield Periflex with chrome coloured top and bottom plates. It has the matching Lumar-X lens mounted, which had the same optical formula but a redesigned lens barrel as the Lumar lens on the black Periflex model.
Top view of the chrome coloured version of the first Periflex.
One of the great things about the Periflex was its ability to use, and properly focus, lenses lacking rangefinder coupling. For instance, one could mount many non-native lenses by use of a L39 adapter. Another great little lens was the Industar-69 28mm f/2.8 pancake lens. It had a 39mm screw mount but since it was made for the Chaika (a half frame camera with slightly longer register distance than the Leica screw mount), it needed a little work to be made to focus to infinity. In essence, the focussing thread inside the lens needed to be ground down by about a millimetre, but it was well worth the effort. It vignettes quite strongly but one has to keep in mind it was designed as a half-frame lens. Now I just need to find a proper 28mm viewfinder, as ironically, the multi-viewfinder which is mounted on the Periflex sticks out more than the very flat Industar lens!
In 1957 the Periflex was nearly completely redesigned and made much more user-friendly. The periscope would automatically lower when the film was advanced and lift again when the shutter was fired. The top housing was enlarged and now contained both the periscope and viewfinder windows. The camera had therefore two eyepieces at the back, so it was much easier to focus and frame the shot than with the Periflex I. In fact, there was a third eyepiece through which one could see the film speed setting, which was adjustable by means of a small dial at the front. It is a little unclear to me what the benefit is of this setup compared to a somewhere on the body of the camera. The viewfinder showed frame lines for two focus distances, infinity and another one marked Fx15 for portrait distance, F being the focal length of the lens mounted to accommodate differences in parallax. The new model had an interesting method of adjusting for different focal lengths. The viewfinder had an interchangeable front element that could be exchanged when necessary for use with different focal lengths. This was a little cumbersome as not only did one have to unscrew one lens and mount another, one had to repeat this procedure for the viewfinder. The shutter speed dial (located beneath the rewind knob) featured an extra set of numbers which indicated the Light Value for a range of different apertures, to aid the use of external light meters. The new Periflex model was called the Periflex 3 and a year later, a less well-featured version, the Periflex 2, was introduced (see below).
Corfield Periflex 3 with fast Lumax 45mm f/1.9 lens. This six-element lens breached a patent by Wray, which got Corfield into trouble (see more on that below with the Interplan-A). Note the large speed dial on the right side of the camera, which also hosted the rewind knob.
Other lenses introduced roughly around the same time were the wide-angle 35mm f/3.5 Retro-Lumax (on the left) and the 135mm f/3.5 Tele-Lumax (on the right). A slower 100m f/4 was also available. Each lens came with its own dedicated viewfinder that, like the lens, needed to be screwed into the front of the camera.
A year later, a less well-featured version of the Periflex 3 was introduced, the Periflex 2. It had a non-interchangeable viewfinder without any frame lines, a slower top shutter speed of 1/500s, and had no film speed window. It still had an interchangeable lens mount, so one needed to get separate accessory-shoe mounted viewfinders if one wanted to use a lens of a different focal length. Not much of a throwback compared to the system on the Periflex 3 really. The camera was of course cheaper than its more advanced cousin, and the story goes that it was introduced only a year after to avoid eating too much into the sales of the Periflex 3.
A Corfield Periflex 2 with Lumax 45mm f/2.8 lens.
In 1959 the Corfield factory moved to Northern Ireland and not long after an updated version of the Periflex 3, the Periflex 3a, was introduced. Most changes were cosmetic and the general layout of the camera remained the same. The main improvements were the introduced of a lever wind instead of a wind knob, and the periscope, which now featured a small split-image rangefinder, which allowed for very accurate focussing. The frame counter (integrated with the wind lever) now also featured a film speed dial, doing away with the extra viewfinder and adjustment dial present on the Periflex 3. The cosmetic changes were most noticeable for the lenses, which were now made in black with grey stripes, in line with the popular 'zebra style' at the time. The wind knobs of the camera where fashioned in a similar style and the interchangeable viewfinder front cells were now made in black.
Corfield Periflex 3a with Lumax 45mm f/1.9 lens, an updated version of the same lens as seen on the Periflex 3 above.
Corfield Periflex 3a with Lumar 95mm f/2.8 telelens and Retro-Lumax 28mm f/3.5 wide-angle lens. The latter is a very rare lens and in fact identical to the six-element Enna Ultra-Lithagon 28mm which was available in m42 and Exakta mounts. Corfield probably ordered these specialty lenses in small batches based on demand; they were easy to adapt to the m39 mount by Enna by simply adding an m39 flange, as no rangefinder coupling was needed with the Periflex system. Another example was the 85mm f/1.5 Super-Lumax, which was equivalent to the Enna Ennaston (later Lithagon) 85mm f/1.5. I've only seen a few of the Retro-Lumax 28mm, they all have serial# close to 1,500,000 (the one shown here has 1,500,005) suggesting very limited numbers. It was also available in the original polished alloy mount, which is equally rare or even rarer. Although apparently 28mm viewfinders were also available I have never seen one.
The three-element 95mm Lumar also has an Enna equivalent (Ennalyt 95/2.8) and is a little more common than the 28mm Retro-Lumax. It replaced the slower 100mm f/4 lens.
Comparison of top plates of the Periflex 2 and Periflex 3a.
A few years after the introduction of the Periflex 3a, in 1961, the Periflex 2 was also updated. This version was called the Gold Star, not 2a as one might have expected. Perhaps this was because the Gold Star was better featured than the Periflex 2 and in fact very similar to the Periflex 3a, the main difference being only its lack of the fastest shutter speeds. The Gold Star was a very successful model and probably the Periflex that is most easy to get nowadays.
Corfield Periflex Gold Star with Lumax 50mm f/2.4 lens, the standard lens for this model. Introduced around the same time was the 135mm f/2.8 Tele-Lumar lens, the fast aperture belying its comparatively small size. The patent associated with this five-element telephoto lens, which was made by Enna-Werk in Munich, Germany, can be found here.
Close-up of the periscope lowered into the body. Upon pushing the shutter release, the periscope would shoot upwards out of the way and would then trigger the focal plane shutter.
One particular benefit of the periscope finder was that it was very convenient for macro photography. Whereas rangefinders needed accessories like additional close-up rangefinders (like the Kodak Retina) or proximeters, on the Periflex one could just add an extension tube of appropriate length and shoot. Framing the shot was perhaps a little more difficult, as the periscope would only show the centre portion of the frame, but based on the magnification factor one could work out the approximate view in close-up shots
If more accuracy was needed an extra accessory was available, the focusing screen adapter. One would mount this adapter on the lens, with the latter secured by a clamp and a tripod, and the ground glass would show the exact focus and frame size. Afterwards one would replace the adapter with the camera body. This accessory is also very handy for testing Leica screw mount lenses.
Corfield went on to make several more versions of the Periflex called the Interplan, including versions for LTM (Interplan-A), m42 (Interplan-B) and Exakta (Interplan-C) lens mounts. The latter two simply had fixed LTM adapters mounted on the body. The Interplan lacked the periscope viewfinder, but the name Periflex was still used on the cameras nonetheless. They had a fastest shutter speed of 1/300 compared to 1/1000 on the Periflex 3a.
Corfield Periflex Interplan-A with Lumax 50mm f/1.9 lens, introduced around the same time as the Lumax 50mm f/2.4 lens on the Goldstar above. The lenses looked very similar, in fact the bodies appear identical. They were both made in Germany by Enna-Werk, but the f1/.9 lens had the marking 'Lic'd by Wray'. It also shows patent nr. 575076 which can be found here. It was a 1944 patent for a five-element version of the double Gauss lenses such as the Zeiss Biotar and Schneider Xenon by removing the rear element and separating and bending the rear doublet. It appears that the earlier version of the f/1.9 Lumax infringed the patent by Wray, even though it was a six-element lens, after which Corfield were forced to add the patent info to the lens and presumably pay a license fee.
The company's final camera, the Corfield 66, was introduced in 1961 and was quite a change from what it had done before, a medium format SLR camera not dissimilar to the Hasselblad 500C and Fujita 66 also around at the time. It was a well-constructed camera without any fancy features, presumably in an attempt to keep the price down (e.g., the fold-up leather viewing hood), but it put the money where it was needed. It had an instant return mirror and was flash synchronised although the synchronisation speed was a slowish 1/15s. However, in the early 60s electronic flashes were available that had very short flash times of <1/500s, so the slow synchronisation speed wasn't a real problem. A ring around the focus knob set the flash delay time for various flash types, it is not a manual frame counter as I first thought!
Unfortunately the Corfield 66 is where the story ended; increased competition in the 1960s from Japan led to camera production no longer being profitable although some unfortunate business decisions, including the move to Northern Ireland and a sell-out to Guinness (!), had also taken their toll.
A Corfield 66 with its standard four-element Lumax 95mm f/3.5 lens and dedicated lens hood. This example was in a rather poor state when I got it, with the leather peeling everywhere, shutter very sluggish, lens focus frozen and aperture ring loose, and all light seals perished and spreading disintegrated bits of foam everywhere. The peeling leather is very common on this model, it was attached with double-sided glued paper, which has lost its stickiness over time. Thankfully, due to its construction the camera was fairly straightforward to service and is ready for action once again.
The Corfield 66 could be used with an interchangeable 120 film back (shown here) or with plates for single 6x6 film sheets. Note the fold-up viewing hood of the waist-level viewfinder, made from leather instead of the more usual metal plates. A simple construction, but on this example it does not stay open very well, making framing the shot accurately difficult.
Corfield 66 with the interchangeable back removed, exposing the large focal plane cloth shutter. A blank slide needed to be inserted into the film back to avoid accidental exposure of the film. The film sheet plates produced slightly larger negatives of nearly 60x60mm than the standard 120 roll film size of 56x56mm.
The Corfield 66 came with a large leather case that could also hold a spare film back or a set of single exposure plates. Carrying all this around must have been hard work!
To finish, a detail of the Corfield 66 lens mount, which was essentially a breech lock mount, the lens being secured to the camera body by a rotating ring. Like most of Corfield's lenses, the Lumax was made by Enna Werk in Germany. Even though the lens was interchangeable, no other lenses were made for this mount, which is unfortunate, the wide 57mm throat would have been ideal for e.g., a fast portrait lens.
Corfield started out as a company by making photographic accessories before they moved into producing cameras. Their first product was an enlarger exposure meter, the Lumimeter, followed by a handheld rangefinder, the Telemeter and an extinction exposure meter. They were well-built and well-finished products, even though they may be perceived cumbersome today. The success of the accessories and the profits that came with it gave Corfield the confidence to branch out into the camera business itself.
Corfield Lumimeter II, Telemeter (with its box) and Optical Exposure meter.