wombat661

Joined on Sep 21, 2013

wombat661's recent activity

  • Do you know the light transmission of this diffraction lens? Glass lens is over 90%. Mirror for telescope is about 80%. You may end up with a bigger lens if light transmission is low.

  • My last generation Nikon Sigma 85mm f1.4 do focus differently in different lighting condition. Notice the same thing with screw drive Nikon lens as well. Deduce that Nikon has algorithm inside the...

  • What does mirror alignment has to do with focus under different light. Incandescent is more yellow, so you will get a different focus than sunlight. Think that is just physics of the lens rather...

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