12-27-2010, 12:24 PM
[quote name='pavol' timestamp='1293404804' post='5215']
Sharpnes at F 5,6 is only a litle better, see attachment.
I think that extreme corner resolution 15 lp/mm (MTF50) of my lens instead circa 30 lp/mm of reference lens is dramatically diference. I will be satiesfied with 25 lp/mm at F 3,5.
[/quote]
What's your reference lens? I think the lens photozone tested also only delivered 20 lp/mm (I hope my math is correct - 950 lwph, 24 mm image height, divide by two for line pairs) in the corners at 10 mm wide open.
Do you adjust for field curvature?
Sharpnes at F 5,6 is only a litle better, see attachment.
I think that extreme corner resolution 15 lp/mm (MTF50) of my lens instead circa 30 lp/mm of reference lens is dramatically diference. I will be satiesfied with 25 lp/mm at F 3,5.
[/quote]
What's your reference lens? I think the lens photozone tested also only delivered 20 lp/mm (I hope my math is correct - 950 lwph, 24 mm image height, divide by two for line pairs) in the corners at 10 mm wide open.
Do you adjust for field curvature?