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|Focal Length||150 mm|
|Camera Mount||Pentax 645|
|Angle of View @ Infinity||21°|
|Minimum Focus Distance||3.94' (1.2 m)|
|Maximum Reproduction Ratio||1:6.7|
|Filter Thread||67 mm|
|Weight||1.10 lb (.5 kg)|
|Dimensions||Approx. 2.93 x 3.78" (74.5 x 96 mm)|
I purchased this lens for a 645z. I know it is not the current generation class of lenses for the z, but it does have the proper coverage for the image. It has a manual aperture ring with an auto lock button on it (A); works fine in both modes.
I don't buy lenses very often. I use a select number of primes for specific purposes and so far the 55mm/2.8 and the 90mm/2.8 macro have been excellent for all my studio shooting. But I decided that I needed to get tighter framed shots, portrait closeups usually, so I bought the 150mm/2.8.
I bought this lens because my 90mm 2.8 lens is a little bit short for headshots... The 150mm is much cheaper but offers excellent sharpness, and a beautiful bokeh... An additional advantage of the lens is that the AF works also with my 645N film camera...
I have had a chance to use this lens in the field and it is super! Fast, very sharp and compact. The only small annoying thing about these serries of Pentax lenses is the way you can slip in and out of auto focus very easily. The barrell can slip into manual mode without much presure.