First, I wanted to try my medium-format lenses on the NONS SL 42(II) - without the NFE, of course. These lenses have a Pentacon-6 (B) mount, so I found a Pentacon-6-Canon EF adapter.
The adapter is called the Pixco P60-EF and is relatively inexpensive. The flange focal distance is correct, but the Canon EF mount has a lot of play.
1/250 f/19:
1/250 f/16:
1/250 f/22:
1/250 f/22:
3. Mir-26B 45/3.5
1/250 f/22:
1/125 (switched by mistake) f/16:
Results:
1. The small "throat size" of the leaf shutter leads to very significant vignetting. A lens must be very specific in order to work properly with this camera without NFE (NONS Format Extender). I don't know of any such lens. This is the reason why later NONS models (SL660 for Instax Square, SL645 for Instax Mini) have a built-in (non-removable) NFE.
2. Instax film has a rather small exposure latitude. Exposure parameters must be precise. Overexposure ruins colors and details. Underexposure makes a photo too dark to see.
3. As I mentioned earlier, Instax film has a native speed of ISO 800, which is rather high, and the fastest shutter speed is 1/250, which is rather slow. In sunny conditions, a very slow aperture (up to f/32) is necessary.
See also related notes:
- Mir-26B 45/3.5: Samples [1] - FF - f/3.5 (2025-09-13)
- NONS SL42 (II): NFE, Pentax K lenses (2025-08-25)
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