Originally posted by jumbleview Recently I become an owner of Pentax 645 camera and 645-A 55mm lens. Medium format is completely new for me.
what about picture quality of 80-160 in the range 135-155? Is it comparable to prime or far behind?
Are you shooting film or digital 645?
As the 80-160mm is only a 2x zoom, the quality is above average throughout. However, at f/4.5, it is slower than the 150mm f/3.5 prime, making for less potential bokeh and a bit darker viewfinder.
It is neither comparable to the prime nor "far behind" and much of your results will depend on
The 645 is already a fairly heavy non-studio type camera, so anything that helps lighten the load, is preferable.
I am not a fan of adapters. If you really care about quality, I would use modern lenses on modern tech.