I bit the bullet and clicked "buy" last week on the much discussed Rokinon 85mm 1.4. Aperture talks to the K20D, but focus is manual only.
I found that when I hit the focus perfectly, the results were astoundingly sharp. However, the margin for error is much more slim than my Pentax SMC-M 50mm 1.4.
Samples:
1/125 - approx. f/4 - ISO 1600
1/125 - approx. f/4 - ISO 1600
1/350 - approx. f/4 - ISO 100
Does anyone else have this lens (or its cousins Bower / Samyang)? Suggestions for maxing its potential?