Compare - f/5.6, f/6.3, f/7,1, & f/8 (4 imgs)

Started Aug 12, 2014 | Discussions thread
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brandrx Forum Pro • Posts: 28,337
Compare - f/5.6, f/6.3, f/7,1, & f/8 (4 imgs)

Hi folks,

A little bit of comparison with the K-50 + Sigma 120-400mm f/4.5~5.6 APO DG OS HSM at 400mm f/5.6, f/6.3, f/7.1, and f/8.

It appears to me that f/5.6 is just a tad soft but usable. All the other apertures through f/11 looks good to me. I stopped shooting at f/8 because the sun went behind a really dark cloud. However, from some of my previous shooting I can say that f/9, f/10 and f/11 look quite good also.

These four images were processed in the same manner. The images are 100% crops. To get the best view then click on original size.

400mm f/5.6

400mm f/6.3

400mm f/7.1

400mm f/8

See my other thread with the K-50 + Sigma 120-400mm at:

It looks like this Sigma 120-400mm f4.5~5.6 APO DG OS HSM has been discontinued. See the following link:

Discontinued Sigma Lenses



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Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

Pentax K-50
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