P3D Re: PHOTO-3D digest 2932

[michaelk@xxxxxxxxxxx (Michael Kersenbrock)]

> Actually, it does assume that the sun is fairly high up in the sky, thus
> the often quoted "10 am to 3 pm" or its variants, but if you're way up
> north or down south, or if it is winter, you'll need to open the lens a
> bit to compensate, even at mid day  (also note that in a world where
> politicians tell you how to set your clock, solar "noon" can be 2:00 pm
> or even later).

The "calculators" on the Viewmaster Personal and TDC vivid reinforces
what you say by having a compensation setting for "summer" and "winter" 
(where one sets the film speed).

Mike K.


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