I shot several rolls with the Pellix in the mid '60's. The light loss is about 30% to the film. The internal light meter compensates for that, but not when using flash. As I found out, my flash exposures were under-exposed because of that 30% light loss. The 12% meter coverage takes some getting used to. If you use a hand-held meter don't forget to reduce the ASA by 30%! There was a slight loss of contrast because of the pellicle mirror, but sharpness was excellent because of lack of vibration and mirror slap. Also, the stationary mirror is always in perfect alignment. I had the 50mm f/1.2 lens, which was quite soft up to f/4 or 5.6.