Hi!

I am thinking (as in: considering, contemplating) about getting myself a standard SDM zoom lens. Presently the options are:

1. Pentax SMC DA* 16-50/2.8 (and some more letters)
2. Sigma EX DC 18-50/2.8 HSM (and some more letters)
3. Sigma EX DC OS 17-50/2.8 HSM (and yet more letters)

#2 is discontinued. I checked the local prices of #1 and #3 and #3 is about 25% cheaper. The company that offers Sigma (similar to Karat playing the role of Pentax Israel) seems to be pretty good. They also offer 2 years warranty on the lens.

#1 has weather sealing, #2 and #3 seem unprotected.

Now, I wonder if anyone on the list is using Sigma HSM lenses with their K-5/K-7 bodies in general and these two in particular. If so, I'd like to hear your opinion.

I am leaning towards #3 but it is all extremely preliminary.

Boris

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