Pentax SMC-FA 20mm f/2.8 - Review / Test Report - Sample Images & Verdict
Lens Reviews - Pentax

Sample Images

Here're some quick'n dirty sample shots taken with the K10D and RAW-converted via ACR 3.7.

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 20.0mm
Exposure Data: f/2.8 @ 1/1600s
Size 3872x2592
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 20.0mm
Exposure Data: f/2.8 @ 1/4000s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 20.0mm
Exposure Data: f/8.0 @ 1/800s
Size 2592x3872
Make PENTAX Corporation
Model PENTAX K10D
ISO Speed 200
Focal Length 20.0mm
Exposure Data: f/8.0 @ 1/320s
Size 2531x3841

Verdict

The Pentax SMC-FA 20mm f/2.8 is a pretty good lens but the current SMC-DA 21mm f/3.2 Limited is a little better all-in-all. That said the differences aren't really pronounced enough to justify an upgrade if you own the older lens. The general performance is actually very good except at wide-open aperture where the FA 20mm f/2.8 suffers from a relatively weak border performance combined with rather low contrast and high vignetting. To be fair that's a fate it shares with many lenses in this range. From f/4 onwards the situation is much better with an excellent center quality and good to very good borders. The amount for barrel distortions is a bit too pronounced for a fix-focal lens whereas CAs are only a real problem beyond f/8. The build quality of the lens is Ok but it can't really rival the Pentax Limited series here.

Optical Quality:
Mechanical Quality:
Price/Performance:discontinued



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