Have you or would you go from Pentax to Sigma?

Started Jan 20, 2013 | Discussions thread
Twong Contributing Member • Posts: 849
Re: Have you or would you go from Pentax to Sigma?

I don't have either one but do have a Tamron 17-50. I doubt the difference in sharpness is that significant that you can see obviously. I have several fixed lenses in this range not because they are sharper but because of the larger aperture. So I recommend spending the money on fixed instead of a marginally better lens that also lacks WR.

CeeDee wrote:

I have the Pentax 16-50mm and are considering the Sigma 17-50mm instead for enhanced sharpness. Of course the weather sealing and manual override on the Pentax are very nice to have. Now I have gained sharpness and better low light focus going from K-5 to K-5 IIs, so maybe the need for lens sharpness is less important.

Have any of you made the switch and what are your impressions, also when it comes to rendering, contrast and bokeh are these two lenses close to be in the same shrank? I guess for size they are about the same, except for the enormous lens hood on the Pentax.

Best regards


 Twong's gear list:Twong's gear list
Olympus PEN E-PM2 Pentax K-3 II Pentax smc FA 50mm F1.4 Pentax smc DA* 50-135mm F2.8 ED (IF) SDM Sigma 70-200mm F2.8 EX DG OS HSM +18 more
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