FA 77 is not a difficult lens but a difficult focal on APS-C sensor cameras.
In fact, FA 77 is in the line of those three legendary Limiteds, designed for 35mm film cameras:
- the perfect normal : 43mm (an not 50mm)
- the perfect wide angle : 31mm (and not 35mm)
- the perfect portrait lens : 77mm (and not 85mm)
I constantly work this lens on my LX and I am completely satisfied of its FOV: an ideal lens for portraiture and more.
On KxxD cameras they are all cropped and give a false mutilated FoV.
When Pentax launch the FF camera, we'll have back the real FA Limiteds as they were conceived.