Archived posting to the Leica Users Group, 2001/01/31

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Subject: Re: [Leica] Re: "R" Mirror-Lens
From: Martin Howard <howard.390@osu.edu>
Date: Wed, 31 Jan 2001 16:21:12 -0500

Wolfgang Oehms jotted down the following:

> does anyone knows the DOF of the mirror lens 8/500?
> 5m,10m, 20m, 40m (meters)??

     5m:  4.98m -  5.02m  (DoF:   4cm)
    10m:  9.91m - 10.09m  (DoF:  18cm)
    20m: 19.63m - 20.38m  (DoF:  75cm)
    40m: 38.54m - 41.58m  (DoF: 304cm)

...for a circle-of-confusion size of 0.030mm.  All according to:

    http://bobatkins.com/photography/technical/dofcalc.html#calc

M.

- -- 
Martin Howard                     | "Why don't they make gravestones
Visiting Scholar, CSEL, OSU       |  cheerier?"
email: howard.390@osu.edu         |                  -- Nigel Tufnel
www: http://mvhoward.i.am/        +---------------------------------------