Thursday, 14 November 2013

Sony 55-210 Versus Pentax 75-150 and 200

Pentax 75-150 mm M f4 versus Sony 55-210 at f8

Top left

Pentax 200 mm M f4  versus Sony 55-210 

Top left 
Top right

The Pentax lenses are sharper in the corners and don't suffer from a warm colour cast, but the Sony provides a similar level of sharpness in the centre of the frame and is less prone to chromatic aberration.

The file sizes of the JPGs produced by PS from TIFFs resulting from a Lightroom raw conversion are as follows: -

150 mm

Pentax 75-150  13913
Sony 55-210     13179

200 mm

Pentax 200     12721
Sony 55-210  12037

Suggesting that both Pentax lenses are collecting more data.        

Edit - since writing this I have discovered that my Pentax 200 mm f4 lens is not focusing to infinity. Once I get this sorted I'll do another comparison. 16-8-2015

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