Sigma AF 17-70mm f/2.8-4.5 DC (Pentax K) - Review / Test Report - Sample Images & Verdict
Lens Reviews - Pentax

Sample Images

Here're a few sample images taken with the K10D and RAW-converted via CaptureOne LE.

Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE (=several megabytes) which requires quite some bandwidth for downloading so please don't waste the limited resources here.

Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 70.0mm
Exposure Data: f/4.5 @ 1/100s
Size 3872x2592
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 70.0mm
Exposure Data: f/4.5 @ 1/160s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 70.0mm
Exposure Data: f/4.5 @ 1/500s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 17.0mm
Exposure Data: f/8.0 @ 1/400s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 48.0mm
Exposure Data: f/4.0 @ 1/1250s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 70.0mm
Exposure Data: f/4.5 @ 1/1000s
Size 3872x2592
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 34.0mm
Exposure Data: f/8.0 @ 1/125s
Size 3872x2592
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 34.0mm
Exposure Data: f/8.0 @ 1/400s
Size 2592x3872

Verdict

The Sigma AF 17-70mm f/2.8-4.5 DC is a very good standard zoom and a viable alternative to the Pentax offerings in this range. Generally it is capable to produce very sharp results although the corner performance leaves a bit to be desired at 17mm at large aperture settings. The vignetting level could also be a bit better here but most competitors don't offer a f/2.8 settings anyway and from f/4 it follows the mainstream. The level of distortions is about typical for a standard zoom whereas chromatic aberrations (color shadows) are comparatively low. The build quality is very fine for a lens in this price league.

Optical Quality:
Mechanical Quality:
Price/Performance:



© by photozone.de