17-70mm lens (Pentax or Tamron advice please)

Started 3 months ago | Discussions thread
Hythloday Senior Member • Posts: 2,220
Re: Proof is in your pudding

Massao wrote:

Are you saying DA 17-70mm is not good for aperture below f/8? If so, we agree:-D

Some 14 years ago I tested the DA16-45mm qnd the Sigma 17-70mm, see:

Pentax 16-45mm vs Sigma 17-70mm: Pentax SLR Talk Forum: Digital Photography Review (dpreview.com)

The best aperture is 8. The Pentax DA16-45mm is slightly less good below that aperture, whereas the Sigma 17-70mm is really horrible, at the WA end. This is conformed by the DXOMARK test.

The Pentax DA117-70mm performs slightly better than the Pentax DA16-45mm.

 Hythloday's gear list:Hythloday's gear list
Pentax K-3 Pentax K-3 II Pentax KP Pentax smc DA 16-45mm F4 ED AL Pentax smc DA* 50-135mm F2.8 ED (IF) SDM +7 more
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