12-27-2010, 03:02 PM
[quote name='BG_Home' timestamp='1293452692' post='5226']
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?
[/quote]
Yes, at Imatest measurement I eliminate curvature by the local Live View focusing.
Nikkor 10-24 is DX lens for the sensor "24 x 16". Therefore is Fhotozone test result at extreme corner much better: 920 LWPH/15,8mm/2 = 30lp/mm !!!
I consider as "reference lens" Nikon specification at Nikon web: http://imaging.nikon.com/products/imagin.../index.htm
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?
[/quote]
Yes, at Imatest measurement I eliminate curvature by the local Live View focusing.
Nikkor 10-24 is DX lens for the sensor "24 x 16". Therefore is Fhotozone test result at extreme corner much better: 920 LWPH/15,8mm/2 = 30lp/mm !!!
I consider as "reference lens" Nikon specification at Nikon web: http://imaging.nikon.com/products/imagin.../index.htm