"Anton Shepelev" wrote in
message ...
Richard Knoppow:

Its pretty easy to set a lens for its exact infin-
ity focus by autocollimating
[...]

Thanks for sharing! I am reading all your posts with
invariable interest. I used to check the infinity
focus of 'normal' lenses using actual long dis-
tances, which I had to do on dark evenings in my
house's backyard with my father at the camera oper-
ating the focus ring and me some eight meters away
shouting to him: "Just half a degree back!"... It's
gonna be easier now.

Anton

Oh yes, actual infinity:-)


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Richard Knoppow
Los Angeles, CA, USA