Sigma strikes again.

George Lazarette
Posted 12/01/2007 - 00:37 Link
From the PDML:

> Finally got My K10D today YAH!!!!!!!!!!!!
>
> but my Sigma 24-70 zoom won't work with it. Won't auto focus, won't auto
> anything,
> Yet same lens works perfictaly on my MZ7.

G
Keywords: Charming, polite, and generally agreeable.
Pwynnej
Posted 12/01/2007 - 08:35 Link
he doesn't say whether it's the cheap one or the EX 2.8 lens

I have a stack of EX lenses.....
spirit_of_will
Posted 12/01/2007 - 14:36 Link
My Sigma's are all working fine on the K10D - they are all EX's

24-70 f/2.8
12-24
70-200
17-35
105 Macro
plus 2x and 1.4x converters

No complaints or issues at all....................

Will
Spirit_of_will

Fan and user of quality Pentax Shiny Kit

WEBSITE www.willbartonphotography.com & www.inspiredlightimages.com

Will Barton Photography: Landscapes, Cityscapes
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fatspider
Posted 12/01/2007 - 15:26 Link
Could this be a similar problem to the one I had with my extension tubes?

see thread https://www.pentaxuser.com/forum/viewtopic.php?t=2720

Read Peters solution (third post from bottom)
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
fatspider
Posted 12/01/2007 - 15:27 Link
DANG! I hate it when the links dont work.....

try again,https://www.pentaxuser.com/forum/viewtopic.php?t=2720


if that didnt work you can cut and paste.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
Mongoose
Posted 12/01/2007 - 16:03 Link
I have a Sigma 28-200 (cheapo one) and a Zeiss branded 75-300 which I'm pretty sure is an early Sigma APO. Both work fine.
Ammonyte
Posted 13/01/2007 - 12:31 Link
No problems at all with my Sigma 12-24mm 1:4.5-5.6 DG EX or 70-300mm 1:4.5-5.6 APO DG
Tim the Ammonyte
--------------
K10D & sundry toys
http://www.ammonyte.com/photos.html
George Lazarette
Posted 13/01/2007 - 13:03 Link
Quote:
No problems at all with my Sigma 12-24mm 1:4.5-5.6 DG EX or 70-300mm 1:4.5-5.6 APO DG
Indeed, I have a Sigma lens which works fine on a Z1-P, but doesn't work at all on an SF-X. There is no consistency. What works on one camera doesn't necessarily work on another.

G
Keywords: Charming, polite, and generally agreeable.
bretbysteve
Posted 13/01/2007 - 15:12 Link
Hi,

I have read this Sigma issue several times before, but never seen the same issue with Tamron lenses. One of the 'joys' of AF cameras and 3rd party lenses, just one of the reasons I avoid both. I also believe John only buys Pentax lenses...

cheers Steve.M.
johnriley
Posted 13/01/2007 - 17:58 Link
In the distant past I have bought all sorts of lenses, but for a long time it has been "Pentax only" and that has been a very good decision.
Best regards, John

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