Pentax Super Takumar 55mm f2

     There is much speculation about the quality of this lens compared to the superb 55mm f1.8 SMC Takumar.  Some assume that it will produce the same results from f2 onward due to its  identical design.   In quick preliminary testing, I found it to be slightly softer and more prone to bokeh fringing in strong light.  This could be due to a slight difference in lens coatings or it could be my particular test lens.   Having said that, it is still a Takumar and it performs like a Takumar.  From f2.8 it is tack sharp.    Luminance and contrast  are excellent.  Colors are very accurate.  Focus ring dampening is superb.  Shadow detail is excellent.   Fringing in backlit/overexposed scenes is very low.   Blown out areas become white.   Diffraction is not noticeable at f16 and vignetting, if at all present, is not visible at any aperture.

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f4 - 50% crop

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f2.8 - 50% crop

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f2 - 100% crop - bokeh fringing

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f2.8 - 100% crop