Re: [photo-3d] Re: Kodaslide II

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

>I have a Brumberger (good starter), a sterling, (Made in wide format) 
>and the Kodaslide II and the Kodaslide II looks the best to me.

Considering that the other two viewers have either single
element lenses or (the Sterling possibly) two airspaced
single lenses, the Kodaslide II has the best optical system.

It would be more fair to compare the Kodaslide II with 
other viewers with achromatic lenses like the Realist
red and green button, Revere, Wollensak, TDC Deluxe.

>I have now added lenses to the Kodaslide II and converted it to 35MM
>for my ortho use.  I now know why 35 MM viewers weren't made readily 
>available in the 50s.  It is much easier to see defects in the 
>slides, harder to focus, and the 3d effect is not as much as with the 
>longer FLs.  

While what you are saying is basically correct, the
reason that 35mm viewers are not readily available
(not in the 50s, today too!) has to do with the
difficulty in designing a good lens with such a short
FL and decent size to cover the format.  If you search
the Edmund Scientific catalog you will not find any
achromatic lens with these specifications.

This is not a problem with larger than 35mm film formats.

>Most people probably would not want it but it works for 
>my needs.

Can you tell us what your needs are?

George