Re: [photo-3d] Re: Medium format viewer

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

> Dr. T wrote:
> >What is the focal length of the lenses in your achomatic Franka
> >viewer???
> 
> 
> Darn.  I was hoping no one would ask.  Don't know how to measure it
> accurately.  I think it was 47mm.  What I can say for sure is that that the
> view through the Red Button is slightly wider than through the Franka.

Yes, but the difference is very small and this was my point.
I suspect your Franka has the 47mm Wollensak lenses.
The FL of these lenses is 47mm, vs. 44mm for the Realist
red button.  The difference is very small so I doubt that this
small difference in FL makes such a difference in viewing.

George Themelis