The Mamiya Sekor 528 TL is a 35mm format SLR camera. It was introduced in 1967. The camera was also sold by Photo Porst under the name “Porst Autoflex TL“. Sears offered it as Sears Auto 35TL.
Functions
The camera lens of the Mamiya Sekor 528 TL is permanently installed and cannot be replaced. It is called “Sekor 1:2.8 f=48mm”, with a focal length of 48mm and a maximum aperture of f/2.8. Focusing is done manually, with the shortest distance to the subject being 80 cm.
This camera has an integrated CdS light meter. Although the aperture and exposure time can be adjusted automatically by the camera, it is also possible to determine these individually.
Bulb mode allows for long exposures, leaving the shutter open for as long as desired. This is particularly useful for night shots. Should additional light be required, an external flash unit can be connected via either the hot shoe or the PC flash port. The camera body measures 14 x 9 x 8 cm and weighs 680 grams.
Films
As for the films for the Mamiya Sekor 528 TL: It requires 35mm films. Currently available options are e.g. the Kodak Ektar 100* for color images and the Kodak T-Max 100* for black and white images. Both films deliver solid results with the camera. Of course there are other manufacturers of suitable film material.
Color film is processed using the C-41 process, a process available in most photo labs. Black and white films require special photochemistry for their development. Although you can send the film to a lab, it’s best to do the processing yourself for best results.
Nowadays, the Mamiya Sekor 528 TL is only available used. Their price and value will vary depending on their condition and functionality. For a used copy you currently have to put about [camera_used price] on the table.
Technical datasheet
| Attribute | Specification |
|---|---|
| Type of Camera | Single lens reflex camera |
| Film format | 35mm |
| Film transport | Manual |
| Picture format | 24 mm x 36 mm |
| Focal length | 48 mm |
| Widest aperture | f/2.8 |
| Minimum focus distance | 80 cm / 2.624 ft |
| Focus | Manual |
| Filter thread | 52 mm |
| Lens design | 3 elements in 3 groups |
| Exposure times | 1/500 second to 1/15 second, Bulb |
| Bulb mode | Yes |
| Light meter | Yes |
| Supported film speeds | ISO 10 to 400 |
| Exposure modes | Shutter priority, Manual mode |
| Auto DX (Film sensitivity) | No |
| Date imprinting | No |
| Built-in flash | No |
| Flash Connection | Hot Shoe, PC-Flash |
| Tripod mount | Yes |
| Cable release thread | Yes |
| Self-timer | No |
| Power supply | 1x S76 battery |
| Size | 14 x 9 x 8 cm |
| Dimensions in inches | 5.51 x 3.54 x 3.15 inches |
| Weight | 680 Grams |
| Country of production | Japan |
| Estimated value / Used price | 56,25 Euro Estimate based on used prices of 7 offers (possibly with different scope of delivery and/or condition). As of June 15, 2026 |
| Average used price in the year 2023 | 35,35 Euro (37.88 US-Dollar) |
| Average used price in the year 2024 | 41,85 Euro (44.38 US-Dollar) |
| Average used price in the year 2025 | 56,42 Euro (60.61 US-Dollar) |
FAQ about the Mamiya Sekor 528 TL
Is the lens on the Mamiya Sekor 528 TL interchangeable, or is it fixed?
The lens is fixed; it's a non-interchangeable 48mm Sekor 1:2.8. This means you can't swap it out for different lenses. It's a feature of this particular camera design.
How do I focus the camera?
The Mamiya Sekor 528 TL uses manual focus. You'll need to adjust the focus ring on the lens until your subject is sharp. The minimum focusing distance is 80 cm.
What kind of film does this camera use?
This rangefinder camera takes standard 35mm film. You can use both color and black and white film. Many brands are compatible.
Does the camera have a light meter?
Yes, the camera has a built-in CdS light meter to help determine the correct exposure. You can also manually adjust the aperture and shutter speed if you wish.
Can I use a flash with the camera?
Yes, you can attach an external flash using either the hot shoe or the PC flash connection. This is useful for low-light situations or to add more light to your photos.