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Siberian Tigers at the Toronto Zoo
Posted By: johnsherwood, 07-25-2008, 04:43 PM

My first photo post........( finally the light went on and I figured out how to!

Looking for C&C re: Should I be happy with the sharpness from my Sigma 70-300 APO DG and K20D combination here? Not exactly National Geographic cover material, but I'm concerned about the spread of AF adjustment from lens to lens with the K20?

ISO 400 240mm f9.5 1/1000 AV
Name:  Retouched-4094.jpg
Views: 689
Size:  251.2 KB

same 1/500 AV
Name:  Retouched-4144.jpg
Views: 777
Size:  409.7 KB

120mm f2250 AV 1/250
Name:  Retouched-4147.jpg
Views: 787
Size:  472.9 KB

Thanks in advance for any feedback

Views: 2,782
07-26-2008, 02:14 AM   #2
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Nice shots and clear

07-26-2008, 05:04 AM   #3
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The shots look good to me. I'd want to see bigger versions to offer more C&C on the sharpness. I would suggest you might have increased the f stop some. 1/250th is plenty fast with SR and a steady hand. You might have been able to increase the DOF with some slower shutter speeds since they don't appear to be moving much.

A true test of lens sharpness has to be done on a tripod without SR and using the 2 second MLU or a cable release.
07-26-2008, 05:34 AM   #4
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Don't see anything obviously bad here - nice sharp shots.

07-26-2008, 05:34 AM   #5
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Thanks for the tips Peter...........much appreciated.
07-26-2008, 05:49 AM   #6
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Thanks too for your feedback Daacon! I am consistently amazed at what a great community this is...........I don't IM or facebook or even use other forums, but I'm fast adding a PentaxForums addiction to my LBA!!


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