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next PZ lens test report: Pentax DA 18-135mm f/3.5-5.6 WR
[quote name='yesman`' timestamp='1303212906' post='7760']

Hi Klaus

The edge performance of the sample on the pentax web site test of the 18-135 seems better compared to the 18-55 @18. Also the comparison to the DA* at 135 is better than your test result would indicate.

You can pull up the comparison of the two here:


While this is not a quantified comparison, it is a good visual comparison of the performance. Perhaps sample variation is the root cause?


Maybe I don't get it but what exactly does this sharpness test tell us ?

I'm seeing a -------> square shaped <----------- Siemens star there. Consequently it ignores / masks all border and corner aspects. Our review already indicates that the center performance is no problem at all. We're criticizing the border/corners as well as the high field curvature at 18mm.

And again - our tested sample has been checked by Pentax. The posted sample images at the extreme ends look simply bad to me in the border/corner region.


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next PZ lens test report: Pentax DA 18-135mm f/3.5-5.6 WR - by Klaus - 04-19-2011, 12:48 PM

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