lens star test on 645z
645 DFA 55/2.8
Borderline OK for astrophotography, and definitely not excellent. It only becomes barely acceptable after stopping down to F4.5.
645 FA 35/3.5
Incredibly sharp in the center but has strong coma even when stopped down to F5.0.
67 90/2.8
There is a sign of misaligned elements, as stars in the lower-right and upper-left corners are softer than the other corners. It is acceptable at F4.0, and fairly good at F4.5. The center is a little bit softer than the 645 55/2.8, but the corners are much better.
67 165mm/F2.8
It's acceptable at F4, and quite decent at F4.5.
F2.8:
F3.5:
F4.0:
F4.5:
Borderline OK for astrophotography, and definitely not excellent. It only becomes barely acceptable after stopping down to F4.5.
645 FA 35/3.5
F4.0:
F5.0:
67 90/2.8
F2.8:
F4.0:
F4.5:
There is a sign of misaligned elements, as stars in the lower-right and upper-left corners are softer than the other corners. It is acceptable at F4.0, and fairly good at F4.5. The center is a little bit softer than the 645 55/2.8, but the corners are much better.
67 165mm/F2.8
F2.8:
F4.0:
F4.5:
It's acceptable at F4, and quite decent at F4.5.
posted by ALOHA at 12:41 AM
0 comments
