Any one has experience with all of these 3 Pentax 645 lenses?
1) Pentax-D FA 645 55mm f/2.8 AL[IF] SDM AW
2) Pentax smc FA 75mm f/2.8
3) Pentax smc FA 645 45-85mm f/4.5
How sharpness, aberrations, colors and contrast of 45-85mm compares with 55mm & 75mm @ f/8 - f/11?