On Wed, Aug 14, 2013 at 10:28 AM, Darren Addy <[email protected]> wrote:

> http://www.addicted2light.com/2013/07/08/battle-of-the-50s-an-update-on-the-pentax-takumar-war/

I don't understand how such a difference in depth of field can occur
due to differences in the optical configuration. I think it far more
likely that they are focused differently, and/or the 8-element is
stopping down more than the 7-element (e.g. due to a mechanical
problem).

Do you own these lenses? I would be curious whether the result can be
reproduced.

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