SMC Pentax-FA 645 45-85mm f ... of lenses is not as vast as the 35mm-format and smaller formats. The quality may be a bit superfluous when pitted against getting the shot with super telephoto ...
Central sharpness is excellent from f/4.5 to f/11, very good at f/16 ... Bokeh is expected to be smooth with long telephoto lenses and this is no exception. Out-of-focus areas show good gradation ...
f/4 is the sweet spot ... but there are more affordable MFT telephoto lenses available if your budget does not stretch this far. To soften the blow, however, the lens does include a 1.4x ...