The Porst CM auto 135 is a viewfinder camera. The 35mm camera was sold by Photo Porst and built by Cosina. It is identical to the Cosina CX-2.
The lens of the Porst CM auto 135 is fixed. The lens is called “Color-Spezial 1:2,8 35mm”. The focal length is 35 mm. The largest aperture is f/2.8. The lens is focused by hand in zones. The model does not have an autofocus function. The closest focusing distance for this lens is 90 cm.
For shooting, the Porst CM auto 135 has a CdS light meter. It is designed for an ISO range of 25 to 400. The exposure settings are set automatically by the camera. Via hot shoe, an external flash can be used with the 35mm camera.
The camera weighs 225 grams. The dimensions are 10.3 x 6.6 x 4.2 cm. The power source of the Porst CM auto 135 is two SR44/LR44 (eBay / Amazon*).
Films for the Porst CM auto 135
What kind of films are needed for the Porst CM auto 135? You have to buy 35mm films for the camera. These films are still manufactured and can be specified at almost any supplier of development work. A color film for the 35mm camera would be the Kodak Ultramax 400*. A possible film for black and white images is the Ilford Delta 400*.
The black and white film must be developed in a black and white developer to get the images. For this you have to buy a suitable developer if you don’t send it to a photo lab.
The color film is processed in the C-41 process, this process is standardized. This is offered by almost every photo lab. The pure development costs at a profile lab are usually between 2.5 and 7 euros.
The photographer must wind the film manually. However, there is also an automatic winder.
The 35mm camera is only available second-hand, as production has ended. Depending on its condition, the cost of the Porst CM auto 135 varies.
Technical datasheet
| Attribute | Specification |
|---|---|
| Type of Camera | Viewfinder camera |
| Film format | 35mm |
| Film transport | Manual |
| Focal length | 35 mm |
| Widest aperture | f/2.8 |
| Minimum focus distance | 90 cm / 2.952 ft |
| Focus | Manual |
| Exposure times | 1/500 second to 2 seconds |
| Light meter | Yes |
| Supported film speeds | ISO 25 to 400 |
| Exposure modes | Program automatic |
| Manual exposure settings | No |
| Auto DX (Film sensitivity) | No |
| Date imprinting | No |
| Built-in flash | No |
| Flash Connection | Hot Shoe |
| Self-timer | No |
| Power supply | 2x LR44 batteries |
| Size | 10,3 x 6,6 x 4,2 cm |
| Dimensions in inches | 4.06 x 2.60 x 1.65 inches |
| Weight | 225 Grams |
| Company name of the brand | Photo Porst |
| Manufacturer | Cosina |
| Country of production | Japan |
FAQ about the Porst CM auto 135
Is the lens on this camera fixed, or can I change it?
The Porst CM auto 135 has a fixed 35mm lens. It's a Color-Spezial 1:2.8 35mm, meaning you can't swap it for a different one. This is common for simpler cameras.
How does the camera focus?
It uses manual zone focusing. There's no autofocus. You adjust the focus ring to a certain distance range appropriate for your subject.
What kind of film does the small camera use?
This is a 35mm film camera, so you'll need standard 35mm rolls. Both color and black and white films work well.
Does the camera have a light meter?
Yes, it has a CdS light meter to help determine the correct exposure. It automatically sets the exposure based on the light meter's readings for ISO 25-400.
Where can I buy this camera now?
Since production has ended, you'll have to find a used Porst CM auto 135. Online marketplaces and camera shops specializing in used equipment are good places to look.