K-3 v's K-5 with SDM lenses

Started 3 months ago | Discussions thread
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seans1969
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K-3 v's K-5 with SDM lenses
3 months ago

This is a question for all the K-3 owners who have also used a K-5 and 50-135mm F2.8 SDM and 16-50mm F2.8 SDM lenses.

I find the combination of a K-5 with the 50-135mm F2.8 SDM lens hopelessly slow for fast action photography even in good light.  When I use this combination to photograph dogs running at me and the like I'm lucky if I get one in thirty shots sharply focused on what the focus indicator said was in focus.

Is the K-3 any quicker to focus or more reliable with this lens when used for this type of photography?

 seans1969's gear list:seans1969's gear list
G1 X II Sony Alpha DSLR-A900 Panasonic Lumix DMC-GF1 Leica M9 Pentax K-5 +25 more
Pentax K-3 Pentax K-5
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