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Forums > Back > Updated review: Tamron SP AF 60mm /f2.0 Di II (Nikon DX)
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[quote name='Brightcolours' timestamp='1294071231' post='5321']

We can see here that it is NOT the optical design... so it must be that the aperture is not correct. Have you checked exposure durations?

[/quote]



That was my idea, too. In fact, the aperture not fully closing is the only reason that seems to make sense. However, I checked durations and "unfortunately" they are flawless:



f/5.6: 1/40s

f/8.0: 1/20

f/11: 1/10

f/16: 1/5

f/22: 1/2.5



The resulting files show no shift in exposure (f/22 files aren't any brighter).



Honestly, I'm absolutely clueless about the reason for the high f/22 resolution. Will be interesting to see if the lens shows the same behaviour on the D7000.



-- Markus
Editor
opticallimits.com

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Updated review: Tamron SP AF 60mm /f2.0 Di II (Nikon DX) - by mst - 01-03-2011, 05:44 PM

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