I got this on Ebay for about £4. I have used this, but not developed the roll as yet. It is quiten old and rickety and not something that I would probably use often as it has some issues that make it quite frustrating to use.

About

According to Camerapedia there were at least four versions of the Gevabox. My copy is the rounded metal bodied model apparently made between 1955 and 1959 for Bilora, by Gevaert Photo-Produktion N.V. Moortsel-Antwerpen. Belgium.

It shoots eight 6×9 frames on 120 film, seemingly from the eye level viewfinder on the top these are in portrait orientation. The film window is quite dark – I loaded  some Kodak film in and could not see the numbers.

Lens and focus.

It has a 105mm lens, the 35mm equivalent is 42mm, a crop factor of 0.4. This gives a field of view of ~32° x 46° You would need to stand about 2.5m away for a full body portrait. The lens is fixed focus.  Hyperfocal distance would be over about 13.47m for this lens at f/11, giving a close focus of over 6m so I think we can assume the lens does not focus to infinity.

Exposure

The lens has apertures of f/11 and 1/16, and the shutter has speeds of 1/50s, 1/100s and Bulb. I would think that as with many cameras with simple shutters like this you could approximate a shutter speed of 1/15s by using bulb mode and pressing and releasing the shutter as quickly as you can. This gives the following exposure table:

Show Exposure Table
Film Aperture Shutter EV Conditions Notes
ISO 50 F/16 1/100 16 Bright sun over sand or snow (1)
1/50 15 Sunny 16 – Bright Sun
1/15 (bulb) 13 Cloudy Bright, no shadows (2)
F/11 1/100 15 Sunny 16 – Bright Sun
1/50 14 Weak Hazy Sun
1/15 (bulb) 12 Open Shade, Heavy Overcast
ISO 100 F/16 1/100 15 Sunny 16 – Bright Sun
1/50 14 Weak Hazy Sun
1/15 (bulb) 12 Open Shade, Heavy Overcast
F/11 1/100 14 Weak Hazy Sun
1/50 13 Cloudy Bright, no shadows (3)
1/15 (bulb) 11 Sunsets. Deep Shade.
ISO 200 F/16 1/100 14 Weak Hazy Sun
1/50 13 Cloudy Bright, no shadows
1/15 (bulb) 11 Sunsets. Deep Shade.
F/11 1/100 13 Cloudy Bright, no shadows
1/50 12 Open Shade, Heavy Overcast
1/15 (bulb) 10 Landscapes immediately after sunset
ISO 400 F/16 1/100 13 Cloudy Bright, no shadows
1/50 12 Open Shade, Heavy Overcast
1/15 (bulb) 10 Landscapes immediately after sunset
F/11 1/100 12 Open Shade, Heavy Overcast
1/50 11 Sunsets. Deep Shade.
1/15 (bulb) 9 Landscapes, 10 minutes after sunset. Neon lights, spotlighted subjects.
ISO 800 F/16 1/100 12 Open Shade, Heavy Overcast 12
1/50 11 Sunsets. Deep Shade. 11
1/15 (bulb) 9 Landscapes, 10 minutes after sunset. Neon lights, spotlighted subjects. 9
F/11 1/100 11 Sunsets. Deep Shade.
1/50 10 Landscapes immediately after sunset
1/15 (bulb) 8 Bright city squares at night. Interiors with bright florescent lights.
ISO 1600 F/16 1/100 11 Sunsets. Deep Shade.
1/50 10 Landscapes immediately after sunset
1/15 (bulb) 8 Bright city squares at night. Interiors with bright florescent lights.
F/11 1/100 10 Landscapes immediately after sunset
1/50 9 Landscapes, 10 minutes after sunset. Neon lights, spotlighted subjects.
1/15 (bulb) 7 Brightly lighted streets.  Stage shows.
ISO 3200 F/16 1/100 10 Landscapes immediately after sunset
1/50 9 Landscapes, 10 minutes after sunset. Neon lights, spotlighted subjects.
1/15 (bulb) 7 Brightly lighted streets.  Stage shows.
F/11 1/100 9 Landscapes, 10 minutes after sunset. Neon lights, spotlighted subjects.
1/50 8 Bright city squares at night. Interiors with bright florescent lights.
1/15 (bulb) 6 Brightly lit home interiors. Fairs, amusement parks
Notes:

1) The figures for 1/100s and 1/50s are actually 1/3 stop lower (allowing more light), but these are a close enough estimation for any normal conditions

2) For the bulb 1/15 shots a tripod may be useful.

3) Often I have to use this instead of sunny 16 in Leeds!

Vital Statistics:

Type: Medium Format 6×9 box camera.
Construction: Metal
Lens: Fixed focus (>10′) meniscus lens;  f=105mm, f/11, stops to f/16.
Shutter: Simple Spring Leaf Shutter; 1/100s, 1/50s, Bulb.
Viewfinder: Telescope Type Eye-level
Flash: Sync socket on lens housing

Links

Online html manual

Gevabox on La Collection d’Appareils

Gevabox on Camerapedia

 

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