Re: Kohler illumination question...

bobmarable@xxxxxxxxxxxxx wrote:
> I agree with Dr. Resnick. I've read in several publications (all
> forgotten!) that true Kholer illumination requires a clear light path
> from the light source onward, to achieve maximum performance from the
> filament's light rays. The frosted filter is a compromise to the
> somewhat tedious task (say some) of setting up true Kohler
> illumination. Some very good information on Kohler illumination can be
> found in the most recent edition of Kodak's "Photography Through the
> Microscope", written/revised by John Gustov Delly.
>
> Bob Marable
>
I have a Nachet 300 microscope that will do true Kohler illumination using a bulb with a flat filament. If it does better than a Leitz Ortholux or Zeiss Standard its not by very much.


Gordon
Gordon Couger

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