Mamiya 7: Replacing the Frame Finder Window with 7II Style Glass
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
This Mamiya 7 had a broken frame finder illumination window. The second photo shows the replacement window in place. In this case, I replaced the window with the improved Mamiya 7II style window that gives better contrast to the frame lines. If your Mamiya 7 frame finder window needs replacing, I’d recommend having the 7II window installed rather than the original Mamiya 7 style.
Since I have an interest in light measurement, photo three shows the new style window being measured for the frequency of light that it passes and photo four shows the spectrometer software reading the frequency of 575nm (yellow) being passed and other frequencies being attenuated.
