The Pentax FA 31mm has an average review score of 89.3%

Score (%):
Pentax SMC-FA 31mm f/1.8 AL Limited
The Pentax SMC-FA 31mm f/1.8 AL Limited is an excellent lens. It is already sharp at f/1.8 and razor sharp at medium apertures. Distortions and CAs are very well controlled. On the downside it vignettes quite a bit at f/1.8 so the ultra-large max. aperture takes its toll here.
Read the full review...


SMC Pentax-FA 31mm f/1.8 AL Limited Lens Review
Here we have a very fine lens indeed. It is an ideal fast standard for DSLRs, but then so is the 35mm f2.4 and that is offered at a fraction of the price. The less expensive lens is also excellent, but not quite as good as this 31mm.
Read the full review...


Pentax 31mm f/1.8 AL Limited SMC P-FA
'm really impressed by the construction and quality of this lens. It is all metal construction, very solid, and is sharp and has an excellent "feel" to it. This serves as an excellent normal lens for the digital sensors. The multicoating is incredable. It was expensive, but I got my money's worth!!
Read the full review...