>
> I started with a sheet of 80 grit laid flat on the top of my table saw,
then
> finished up with 400 grit. The result is an adapter that is approximately
> 6.9mm in thickness. The only down side is that the lens screwed into the
> adapter approximately 45deg further than before, so the lens index,
formerly
> at the top, is now down on the left side. No big deal.
>
> Here are some representative photos, with f stops. Just as a reminder,
you
> can't use exact f stops in a title. I had to use dashes instead of
periods.
>
> Although I shot at all marked stops, from 1.8 to 22, I only posted four
> images as examples. The sun was getting lower as the f stops got higher,
so
> the light does change somewhat.
>
> http://gallery.leica-users.org/v/OldNick/Takumar+55+at+f1-8.jpg.html
>
In this photo the centre of your field of focus appears to be right at
the intersection, and I'm going to hazard a guess that it's around 12m
distance. Looking at the near and far fuzzies the total depth is about
3-4m. Going to my depth of focus charts that appears to be just about right
for f/1.8 at 12-13m distance.
Chris
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