Chris,
That intersection is 75 meters from where I was standing. Don't forget, the
field you are seeing with the 55mm lens is equivalent to that of a 110mm
lens on a full-frame camera.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chris Trask" <christrask@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, August 22, 2011 7:48 PM
Subject: Re: [OM] Was: mount mod; Now M42-to-4/3 Adapter Thickness
> >
>> 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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