Ross Portable Divided – A Special Twin Lens Reflex
Lens:
f8, 7 ½”, 6″ x 5″ Rapid Symmetrical, iris diaphragm to f64 with click stops. Serial no. 50527 .
Viewing lens: similar but without iris (unused slot for Waterhouse stops). Serial no. 52147 .
Shutter:
T-P Time shutter, without speed indicator. Serial no. H8238.
Construction:
Black stitched hide covering on wood, black painted interior.
Format:
4″ x 5″ plates held in double dark-slides.
Focusing:
Bellows to 8 feet.
Attributes:
Reflex viewing through second lens. Full-size ground glass focusing screen. Eye-level mirror in hood. The lens retracts to close the door.
Movements:
Cross front.
Serial Number:
670 .
Lens:
f8, 7 ½”, 6″ x 5″ Rapid Symmetrical, iris diaphragm with external pointer to f64. Serial no. 52234 .
Viewing lens: similar but without iris (unused slot for Waterhouse stops). Serial no. 52243 .
Shutter:
T-P T & I shutter, speeded 1/15 – 1/90. Ross label. Serial no. O8295.
Construction:
De-luxe finish of brown stitched hide covering on mahogany, polished interior, aluminium fittings.
Format:
4″ x 5″ plates held in double dark-slides.
Focusing:
Bellows to 8 feet.
Attributes:
Reflex viewing through second lens. Full-size ground glass focusing screen. Eye-level mirror in hood. The lens retracts to close the door.
Movements:
Rising front.
Serial Number:
915 .
Notes:
Address label on case: Ross & Co. 111 New Bond St. London.
With:
- 6 double dark-slides (1 – 12), mahogany with aluminium fittings.; Lens cap.
- Ross focusing magnifier, screw adjustment with locking ring. Two lenses. In box.
- Extension back. Focusing with combined lens is to c 2′ 4″, with single element focusing is from infinity to 11 feet.
- Velvet hood for focusing screen with wooden eye piece panel.; Focusing cloth.; Canvas case.
The 
Portable Divided was one of several twin-lens reflex cameras put on the market in the late 1880s and early 1890s. The concept was not new, there had been models made previously but not in great numbers. At this time hand-held detective cameras were available as were folding bellows cameras, single-lens reflexes were just making an appearance. The Portable Divided appealed to the user who wanted a larger finder that showed exactly what would be in the negative and was quick to use. This was true of the Ross, which was able to be used in the hand; advertisements stressed how, with the neck strap, it could be steadied against the body and used for action shots, the image remaining visible at all times. Advertisements recommended it for yacht photography.
It is fitted with a good lens but has only a small focusing distance and limited movements. The lenses can be racked back past infinity allowing the door to close with the lens and shutter in place. A swing back was available.
These are early models of the Portable Divided with a single door, later an improved folding model with double doors was introduced. The doors of the later model when open became the sides of the camera allowing a more compact design.
The De-luxe model, finished in brown stitched hide and aluminium, dates to c.1897. The improved model, with double doors, was also sold in a de-luxe finish. The extension back with this example is a bellows unit with two side struts. It slots into the normal position for the dark-slide.
References & Notes:
BJA 1892, p. 51.; BJA 1893.; BJA 1897.; BJA 1913, p. 60.; YBP 1893, p. 15A.; BJA 1898, p. 78 (focusing hood).
Illustrations:
Christies Cat. 6/5/05 lot 317. Unusual model with polished mahogany finish.; Christie’s cat. 6/10/83 lot 332. Improved model with pigskin finish, lens no. 59216.
Contaflex TLR – A legendary
In 1935, Zeiss Ikon brought forth the most advanced – and one of the heaviest cameras – of the day: the Contaflex (860/24) twin-lens reflex that used 35mm film. Camera has been produced only to 1943. The camera boasted the first built-in selenium light meter. The Contaflex featured interchangeable lenses, a focal plane shutter and a van Albada sports viewfinder. The lenses were the same as those offered for the Contax II but in a Contaflex mount. This heavy camera was considered to be one of the greatest German engineer’s cameras ever built. Contaflex had the first built-in selenium light meter, the first chrome finish and the first interchangeable lenses on a TLR. The viewing screen accommodates views for a range of lenses with concentric frames for them plus a very useful pop-up magnifier. The focusing screen is 2x the size of a 35mm neg and gives parallax correction for the 50mm standard lenses. The viewing lens is an 80mm or 8cm f2.8, which showed the same angle of view as the 50mm or 5cm f1.5 lens, but on a larger viewing screen and with shallower depth of field. The camera had interchangeable lenses with framelines in the finder for them all (except the wide angles) which required an auxiliary finder. The shutter is similar to the that used in the prewar Contax cameras, a vertically traveling focal plane shutter made of metal slats. It is heavy, 1.5kg, about twice as much as the Contax I. The lenses are also larger and heavier than their Contax counterparts, and are difficult to mount. The view through the finder isn’t bright by today’s standards, although it’s not too bad when compared to some of the tiny viewfinders of the day. The magnifier is a necessity if you plan on focusing. Between the waist level viewing, with it’s reversed image, and the need for a magnifier, the only way you can photograph anything moving is with the Albanda finder. But in doing that, you’ve just turned your overly expensive and heavy camera into a viewfinder camera. And if you think photographing action is bad, try taking a picture in portrait format (as opposed to landscape). You must hold the camera on it’s side at eyelevel, parallel to the subject. Now, instead of everything being backwards, it is upside down! And the controls are in the most inconvenient places. This is a camera that sold in 1939 for $250 with the 50/2.8 Tessar, and $372 with the 1.5 Sonnar. With the 50/1.5, it was the tied for being the most expensive still camera in their catalog with the Contax III with it’s 50/1.5. A range of accessories were offered for it, which are rarely seen today. They included a special lens shade which clips to the body, a cut film adapter back, a microscope adapter and an special arm for the copy stand.
A Review from pacific rim camera
Contaflex TLR, shown with 50/1.5 Sonnar This is one of the most impressive cameras ever built. Introduced in 1935, it was the first camera to have a built in exposure meter, and the first available in chrome finish. This was the flagship camera of the Zeiss line at one of their proudest moments. The viewing lens is an 80/2.8, which showed the same angle of view as the 50mm normal, but on a larger viewing screen, and with shallower depth of field. The camera had interchangeable lenses, with framelines in the finder for them all, except the wide angles, which required an auxiliary finder. The shutter is similar to the shutter used in the prewar Contax cameras, a vertically traveling focal plane shutter made of metal slats.
This is a perfect example of how the German photo industry was often driven by engineers. They conceived the camera as a feat of engineering. Many of the solutions are ingenious, and the camera is truly a marvel to behold. But as a instrument for making photographs, it is miserable. It is heavy, weighing 3-1/4 lbs (1.5kg), about twice as much as the Contax I. The lenses are also larger and heavier than their Contax counterparts, and are difficult to mount.
The view through the finder isn’t bright by today’s standards, although it’s not too bad when compared to some of the tiny viewfinders of the day. The magnifier is a necessity if you plan on focusing. Between the waist level viewing, with it’s reversed image, and the need for a magnifier, the only way you can photograph anything moving is with the Albanda finder. But in doing that, you’ve just turned your overly expensive and heavy camera into a viewfinder camera. And if you think photographing action is bad, try taking a picture in portrait format (as opposed to landscape). You must hold the camera on it’s side at eyelevel, parallel to the subject. Now, instead of everything being backwards, it is upside down! And the controls are in the most inconvenient places.
This is a camera that sold in 1939 for $250 with the 50/2.8 Tessar, and $372 with the 1.5 Sonnar. With the 50/1.5, it was the tied for being the most expensive still camera in their catalog with the Contax III with it’s 50/1.5. A range of accessories were offered for it, which are rarely seen today. They included a special lens shade which clips to the body, a cut film adapter back, a microscope adapter and an special arm for the copy stand.
Contaflex TLR Lenses
35/4.5 Orthometer
35/2.8 Biogon
50/2.8 Tessar
50/2 Sonnar
50/1.5 Sonnar
85/4 Triotar
85/2 Sonnar
135/4 Sonnar
The frame lines in the finder.
A look at the lens mount. The notch connects the lens to the focus on the camera.
Four of the lenses, the 35/2.8 Biogon, the 85/2 Sonnar, the 50/1.5 Sonnar and the 50/2 Sonnar.
The 35/2.8 Biogon mounted on the camera.
The 85/2 Sonnar mounted.
The 135/4 Sonnar mounted.
The 135/4 Sonnar.
The eveready case for the Contaflex.
The front cap.
The cut film adapter back, with holder and ground glass focus screen.
The camera apart, in case you were thinking of taking one apart to see what is inside.
The camera apart, from the back showing the shutter. The curtain straps are broken on this camera
TLRgraphy 