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03-14-2010, 04:18 PM   #1
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Sigma 400mm F5.6 TeleMacro & K7 AF?

I got hold of a mint (actually "new old stock") Sigma 400mm F5.6 APO Tele-macro MF (non-HSM) and I've taken some nice test shots with my K7 set to MF and the lens to A.

I don't want to do any damage experimenting so does anyone know if this lens is compatible with the Auto Focus of the k7? I assume that this lens doesn't have what's needed for AF to work even though the focus motor is in the K7.

If it matters I have the version that uses the 77mm filter size (I believe the 72mm were older versions and optically not as good).


Last edited by seachunk2; 03-14-2010 at 04:38 PM.
03-14-2010, 04:37 PM   #2
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Congrats! That is an excellent lens. It came in MF and AF versions. I've been looking for one for 2 years. If it is the AF version it should perform with well with the K7s AF. If it is the MF version it will not autofocus. There is a review here:

https://www.pentaxforums.com/userreviews/showproduct.php?product=486&cat=73

http://www.photozone.de/canon-eos/306-sigma-af-400mm-f56-hsm-apo-macro-test-report--review

Last edited by ivoire; 03-14-2010 at 04:47 PM.
03-14-2010, 05:09 PM   #3
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Yeah, mine is the MF version so no AF. Figured I asked. Wishful thinking but I'm still quite pleased.
03-14-2010, 05:12 PM   #4
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QuoteOriginally posted by seachunk2 Quote
Yeah, mine is the MF version so no AF. Figured I asked. Wishful thinking but I'm still quite pleased.
I owned the manual version and regret selling it. excellent performance.

03-15-2010, 09:48 AM   #5
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QuoteOriginally posted by seachunk2 Quote
I got hold of a mint (actually "new old stock") Sigma 400mm F5.6 APO Tele-macro MF (non-HSM)

If it' manual focus then I think you can safely say its non HSM


Would be interested in seeing some pics taken with it, have heard good things about the lens.
03-15-2010, 04:25 PM   #6
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I'll post some pictures as soon as I shoot some that are worthy.
Hope to get out this weekend. Weather is supposed to be nice (mid 60's!)
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