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05-28-2013, 11:57 AM   #1
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SMC Pentax-M 20mm f/4 lens test

Thought I'd separate this from the 'examples' thread?

Shot on a crop-sensor (K5) - 2s mirror up, tripod, remote release, SR off.

I realise this test is far from perfect - please don't critique the technique - and I hope the results are useful to someone.\

All are click for full-size.

Overall images:
F4



F5.6



F8



F11



F16



Centre 100% crops:
F4



F5.6



F8



F11



F16




Edge 100% crops:
F4



F5.6



F8



F11



F16



Conclusion:
Sharp in the centre from wide-open, best aperture f/8.

05-28-2013, 12:01 PM   #2
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I'll agree with your conclusion after looking at the images full size.
05-28-2013, 12:17 PM   #3
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Rob

a thread for this lens already exists in the archive.
https://www.pentaxforums.com/forums/lens-sample-photo-archive/178504-super-mu...m-20mm-f4.html

Please consult the archive listings before starting a new thread.I will add this but comment duplicate entry do not use, behind it in the listing
https://www.pentaxforums.com/forums/lens-sample-photo-archive/210462-index-lenses-section.html

thanks Lowell
05-28-2013, 12:28 PM   #4
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Original Poster
Lowell, please can you delete this thread then?

I'll post the entire tests in the already existing threads - was just trying to not clog up example photos with boring test shots.

Thanks,

Rob


Last edited by rob1234; 05-28-2013 at 12:50 PM.
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