Pentax-01 Standard Prime 8.5mm f/1.9 (Pentax Q) - Review / Lens Test - Sample Images & Verdict
Lens Reviews - Pentax Q

Sample Images

Here're some RAW-converted images taken with the Pentax Q.

Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE samples (=several megabytes) thus requiring a significant amount of bandwidth so please take care of the limited resources here.

Make PENTAX
Model PENTAX Q
ISO Speed 1000
Focal Length 8.5mm
Aperture: f/1.9
Exposure 1/60s
Make PENTAX
Model PENTAX Q
ISO Speed 125
Focal Length 8.5mm
Aperture: f/1.9
Exposure 1/2000s
Make PENTAX
Model PENTAX Q
ISO Speed 125
Focal Length 8.5mm
Aperture: f/1.9
Exposure 1/1250s
Make PENTAX
Model PENTAX Q
ISO Speed 125
Focal Length 8.5mm
Aperture: f/1.9
Exposure 1/800s
Make PENTAX
Model PENTAX Q
ISO Speed 125
Focal Length 8.5mm
Aperture: f/4.0
Exposure 1/250s
Make PENTAX
Model PENTAX Q
ISO Speed 125
Focal Length 8.5mm
Aperture: f/1.9
Exposure 1/2000s

Verdict

You may debate the tiny sensor size of the Pentax Q but Pentax has managed to release a lens that can make the most of the (limited) potential. The Pentax-01 Standard Prime 8.5mm f/1.9 is capable of exploiting the sensor to the max even at fully open aperture. The images may still look fairly soft but this is not a problem of the lens which shows an evenly high performance across the frame till about f/4. At f/5.6 there's a rather significant quality drop due to diffraction. Stopping down beyond f/5.6 should be avoided. Vignetting is not an issue. However, a rather heavy amount of barrel distortion and some visible CAs are on the negative list. The Q system is not really meant for shallow depth-of-field applications but if you can choose a very close distance to your subject you can achieve a very smooth bokeh (smoothness of the out-of-focus blur) with this lens.

The build quality is very good although subjectively it seems to lack substance due to a weight of just 36g. The AF speed is pretty good but, of course, mostly dependent on the capabilities of the camera. The AF motor is basically noiseless. The Q lens has a so-called focus-by-wire system for manual focusing so you actually drive the AF motor here. However, because of the rather coarse 4x magnification in focus assist mode it is really hard to focus accurately but this is not really a primary use-case in this system anyway. It is about size and weight and the Pentax Standard Prime is pretty brilliant in this respect.

Optical Quality:    
Mechanical Quality:
Price/Performance:
      
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