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How image quality compares between Pentax 645: FA 45-85 f/4.5 Vs. 55 f/2.8 & 75 f/2.8

How image quality compares between Pentax 645: FA 45-85 f/4.5 Vs. 55 f/2.8 & 75 f/2.8

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?

Thanks,

Subrata
 
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