I'd hoped this lens, which seems to have a similar optical layout to the greatly respected P67 55-100 lens, would be as sharp. Wide open, the lens is very soft in the outer 1/3 of the frame. Not until stopped down to f8 is most of the frame sharp and contrasty. By f11, the whole frame is sharp.

• +

  small and convenient

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  not sharp until f8-f11; req large 82mm filters

This is based on one sample on one 645z body. Comments refer to the central area of the lens only, as for my images I don't much care if the corners go soft. I also don't concern myself much with distortion, as it's so easy to correct. Most all of my images are in good light at base ISO.

• +

  Relatively light and compact

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  Feels cheap it's so light, 82 mm filters are expensive