Polaroid 55 Instant Film Test - Homemade SINAR Handy 4x5 Camera

This test was done to test the coverage of the Mamiya-Sekor 50mm lens that mates with the Mamiya Press Series of Medium Format Rangefinder Cameras.  The acceptable image would have been properly focused at infinity and covered the entire film area.

Focal Length...I missed
Coverage...I missed
Exposure:  I sure miss Polaroid 55!

Setup:

SINAR Handy -

• SINAR 4x5 Carrier Frame
• SINAR Grip and frame adapter
• SINAR 12mm Extended #3 Lens Board (Atmos)
• SINAR 4x5 Graflok Back and Ground Glass

Lens Assembly -

• Mamiya-Sekor 50mm ƒ/6.3, (for Universal Press)
• Synchro-Compur-P #0 Shutter (for Xenar 135mm ƒ/4.7)
• Schneider 65mm Helicoid

Back -

• Polaroid 545i Film Holder
• Polaroid Type 55 4x5 Instant Film (Dated: Jan 2009)

Well, I still believe that the Mamiya-Sekor 50mm Lens will cover the 4x5 format, or at least 6x12.  In short, I think I had too many simultaneous tests going on.  However, it is always nice to see a Polaroid 55 exposure.

Somehow, I need to find infinity for this lens, and then create a dedicated adapter/lens cone.  Then, I can try employing shims between the elements.  A different shutter, one achieving an opening of 2.27 mm and smaller is also needed to achieve ƒ/22.  Also, in this aperture/speed range, a film that may be exposed for a longer time than Polaroid 55 (less reciprocity failure?) would be useful as well.