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07-28-2011, 06:08 PM   #1
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K-5 with Canon lens?

Hey all,

I have wanted to get one of the FA* 600mm Pentax lenses, but we all know that's not going to happen.
Has anybody had any success using a Canon 600mm f4 with a Canon to Pentax lens adapter? I was thinking of trying it. I have the adapter, but I don't want to pay out for a big lens until I know it will work.

07-28-2011, 06:44 PM   #2
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It really can't be done due to Canon's registration distance is shorter than the Pentax. Here is a discussion on the topic...

07-28-2011, 07:39 PM   #3
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If you can afford a Canon 600/4, then tossing in a 60D dedicated to that lens should be no problem. Beats adaptors.
07-29-2011, 12:42 AM   #4
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yep, if you want big tele lenses, get a canon body and superglue it to that lens. Thinking about that very thing.

07-29-2011, 03:13 AM   #5
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Good stuff.

Huh, I never thought I would get a "buy a Canon" recommendation on this forum.
07-29-2011, 03:40 AM   #6
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If you want pro tele lenses Sigma is more or less your only option unless you go looking for used lenses. Definitely not as nice as the canon lens, but worth considering:
Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF 184109

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