Is the pentax hd fa 43mm f 1 9 limited sharp wide open?

I don't have sharpness test results for the Pentax HD FA 43mm f/1.9 Limited, so I can't tell you how crisp it is at f/1.9. What I can tell you is that it's a 43mm prime for full frame. It shares its optics with the older smc FA 43mm Limited, fits the Pentax K-1 and K-1 Mark II, and also works on a long list of APS-C Pentax bodies. On APS-C it frames like a 64mm lens on full frame.

If you're deciding whether wide-open shooting suits you, the aperture guide explains what f/1.9 means for light and background blur. For keeping eyes sharp when depth of field is thin, see aperture and background blur. The full specs and compatible cameras are on the lens page.

Written by Claude from this site's pages.