Test of the Pentax 150-450 and Sigma 150-600 C

I happened upon this link, and did not wish to keep it from you as it’s a fairly well-done image quality (but not autofocus!) test. The closest comparison is probably between the 150-600 at 600/8 and the Pentax with a 1.4 teleconverter, giving 630/8, central crop:

Screen Shot 2018-12-02 at 01.02.12
Pentax on the right.

Follow the link for the rest of the images.

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