The Petri PX5F is a simple point-and-shoot camera from the 1980s. This 35mm camera was also known as the “Cosina CX5F”; both models are identical in their features. The Japanese company Cosina produced both models.
An earlier version, the Cosina CX5, offered additional options such as manual focusing and extended ISO settings.
The lens of the Petri PX5F is fixed and not interchangeable. It is labeled “COSINON 1:3.8 33mm.” The focal length is 33 mm and the maximum aperture is f/3.8.
Since the focus is fixed, there is no way to manually adjust the focus. For sharp images, the distance to the subject should be at least 90 cm.
The exposure settings are determined automatically by the camera’s electronics, which use metering cells. The camera is designed for film with a sensitivity of ISO 100 or ISO 400. The value is set using a slider on the front panel.
Aperture and shutter speed are fixed; exposure compensation is not available.
The built-in flash can be used in low-light conditions. The flash range is 0.9 to 3 meters at ISO 100, which corresponds to a guide number of 12.
The camera is powered by two AAA batteries (eBay / Amazon*), which are easily available.
A tripod thread and self-timer are missing.
Films for the Petri PX5F
Films for this camera are also readily available. The Petri PX5F uses 35mm film. There is a wide range of compatible color and black-and-white films.
For color photos, the Fujifilm Superia 400* is recommended, while for black-and-white photos, the Kodak T-Max 100* is recommended. Many other films can also be used.
Color films must be developed using the C-41 process, which can be done in any photo lab that develops 35mm film.
The negatives of the Petri PX5F are 24 mm x 36 mm in size. A standard 35mm film contains approximately 36 exposures. The film advances to the next frame manually using a thumbwheel on the back, as there is no automatic advance function. A frame counter is located on the top.
Technical datasheet
| Attribute | Specification |
|---|---|
| Type of Camera | Viewfinder camera |
| Film format | 35mm |
| Film transport | Manual |
| Film transport mechanism | Thumbwheel |
| Picture format | 24 mm x 36 mm |
| Lens name | COSINON 1:3.8 33mm |
| Focal length | 33 mm |
| Widest aperture | f/3.8 |
| Minimum focus distance | 90 cm / 2.952 ft |
| Focus | Fixed |
| Type of focus | Zone focus |
| Focus zones | 1,1 m, 2,7 m, Infinite |
| Lens design | 4 elements in 3 groups |
| Viewfinder | Illuminated frame finder with parallax compensation marks |
| Exposure times | 1/500 second to 1/30 second |
| Light meter | Yes |
| Supported film speeds | ISO 100 to 400 |
| Exposure modes | Program automatic |
| Manual exposure settings | No |
| Auto DX (Film sensitivity) | No |
| Date imprinting | No |
| Double and/or multiple exposure function | No |
| Flash | Integrated flash |
| Flash range | 0,9 to 3 Meter / 2.95 to 9.84 Feet |
| Flash recycle time | circa 7 seconds |
| Flash sync speed | 1/125 s |
| Tripod mount | No |
| Cable release thread | No |
| Self-timer | No |
| Connection for camera strap | Yes |
| Power supply | 2x AAA batteries |
| Manufacturer | Cosina |
| Country of production | Japan |
FAQ about the Petri PX5F
What kind of film does this camera use, and is it easy to find?
This camera uses standard 35mm film, which is readily available in both color and black and white options. You can find it at most camera stores or online retailers. So it is easy to find the right films for it.
Does this camera focus automatically, or do I need to do it myself? What if the object is too close?
The Petri PX5F has a fixed focus, meaning it doesn't focus automatically, and you can't adjust it manually. For the sharpest results, make sure your subject is at least 90 cm away from the camera. If the object is closer, the image may be blurry.
What does ISO mean? And how to select the ISO on the camera?
ISO refers to the film's sensitivity to light; higher ISO values are better for low-light conditions. On the Petri PX5F, you select the ISO using a slider on the front of the camera. You can choose between ISO 100 and ISO 400, depending on the lighting conditions.
Can I change the lens on this thing to get different kinds of shots?
No, the lens on this camera, also known as the 'COSINON 1:3.8 33mm', is permanently attached and cannot be removed or swapped out for a different lens. The built in lens has a focal length of 33mm.
How do I power the camera and how long will it work?
The Petri PX5F requires two AAA batteries for power. How long the batteries will last, it can depend on factors like flash use and battery quality. It is recommended to carry spare batteries.