The Gakkenflex, a plastic camera that takes pictures in 35mm TLR format, was first published in the Japanese magazine “Otona no Kagaku” published by Gakken. The camera, with the name “Gakkenflex” on the front, was included in issue #25 of October 30, 2009 and was designed as a kit.
Although the original magazine may be difficult to obtain, replicas such as the “Recesky TLR” and the “Fotodiox TLR” are available online.
The kit’s accompanying papers describe the camera’s specifications: a fixed aperture of f/11 and a shutter speed of 1/125 second. If one component is omitted, the camera becomes slightly faster.
The lens consists of a simple plastic lens with a meniscus shape. Focusing is done simultaneously for the recording and viewfinder lenses via external gears, similar to the way the Ricohflex with gear lens or the Lubitel works.
The simple lens construction produces images with a strong sharpness gradient, reminiscent of the tilt-shift effect. The camera is essentially a toy model.
No batteries are required to operate the camera.
Films for the Gakkenflex
What film is recommended for the Gakkenflex? The camera is designed for use with 35mm film. A large selection of color and black and white films is still available for this format.
Easily available online and suitable for the Gakkenflex are, for example, the Ilford XP2 Super* for attractive black and white shots and the Kodak Portra 400* for bright color photos. Experience reports and tests prove that both films are suitable for different subjects.
Color films are developed using the C-41 process. This process is offered by all photo labs that develop 35mm films.
The camera’s image size is 24 mm x 36 mm. With this exposure area, 36 images can usually be taken on a standard film (135-36). Since the camera does not have an automatic film transport, the film must be wound manually.
Technical datasheet
| Attribute | Specification |
|---|---|
| Type of Camera | Twin-lens reflex camera |
| Film format | 35mm |
| Film transport | Manual |
| Film transport mechanism | Rotary knob |
| Picture format | 24 mm x 36 mm |
| Focal length | 50 mm |
| Widest aperture | f/11 |
| Minimum focus distance | 50 cm / 1.64 ft |
| Focus | Fixed |
| Exposure times | 1/125 second |
| Date imprinting | No |
| Double and/or multiple exposure function | Yes |
| Built-in flash | No |
| Tripod mount | No |
| Cable release thread | No |
| Self-timer | No |
| Connection for camera strap | Yes |
| Power supply | Not necessary |
FAQ about the Gakkenflex
What kind of film does this plastic camera use?
It uses standard 35mm film, readily available in both color and black and white varieties. Popular choices include Kodak Portra 400 and Ilford XP2 Super.
How is the focus adjusted on the Gakkenflex?
Focusing is achieved through external gear rings that simultaneously adjust both the taking and viewfinder lenses, similar to a Ricohflex or Lubitel.
Does the Gakkenflex require batteries to operate?
No, this simple camera doesn't require any batteries for operation. It's purely mechanical.
What is the image format and size produced by the plastic 35mm TLR?
The camera produces 24mm x 36mm images on standard 35mm film (135-36), allowing for 36 exposures per roll. Manual film advance is necessary.
Where can I find this build-it-yourself camera kit, if the original magazine is unavailable?
While the original kit from the magazine is hard to find, similar DIY kits like the Recesky TLR or Fotodiox TLR are available online.