Sigma HSM compatability


Link Posted 29/06/2013 - 10:03
Has anyone heard or had experience of the compatability of earlier Sigma HSM lenses with the K5-ll/lls? I bought a non OS 120-400mm which works perfectly on my K-30 but will sometimes refuse to lock focus on my K5-lls. It's rather as if you've put a tcon onto a slow lens - the af just goes from one end to the other without locking. The screen also seems to look a bit dimmer through the viewfinder. I've done all the usual cleaning of terminals etc. It's odd that it will sometimes seem to work and sometimes not. All other lenses work perfectly on the K5-lls including a very old Sigma non HSM.


Link Posted 29/06/2013 - 10:43
I've not had any problems with the latest 150-500mm on a
K-5 even with a Jessops (clone/type) 1.7x TC.
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Last Edited by Algernon on 29/06/2013 - 10:43
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