View Full Version : Sigma 50mm F1.4 EX DG HSM for Pentax K200?

03-06-2011, 3:19pm
Hi all. I have a query I've so far been unable to find a definitive answer to, so I'm helping the kind and knowledgeable souls on this forum can shed some light for me!

I'm looking into buying the Sigma 50mm F1.4 EX DG HSM lens, but I noted in a review that 'it unfortunately comes at a cost to users of older Pentax DSLRs, as the effective 'KAF-3' lens mount specification means AF won't work on models which don't support SSM.' (http://www.dpreview.com/lensreviews/sigma_50_1p4_c16/)

I'm not entirely certain what they mean by older DSLRs. I have a K200 with a KAF-2 mount, but it's by no means 'old' - it was released the same year as this lens. So my question is - does anyone know if the auto-focus will work on my antiquated little beast?

04-06-2011, 7:29am
Yes as far as I can see it will work.
I have a sigma ex that works fine but not a 50mm.....

04-06-2011, 1:51pm
yes auto focus will work

the K200d has auto-foucs that supports SDM (pentax) or HSM (sigma)

the sigma 50mm gets good reviews, see pentax forums

23-06-2011, 10:00am

I have a K20D and I just removed its lens. If you do the same and look at the opening at about 5 o'clock if there are two recessed contacts they are for the HSM.
I have a Sigma lens catalogue and that is what it also says.
Give CR Kennedy a call at Hamilton on 07 38626222 as they are both the Pentax and Sigma dealers.