Re: [APML] Epsilon 160 and 210 informations.

[KGKIRKLEY@aol.com]

Concerning the Epsilon 210 and 6x7 Format:

Something to consider.
Although the Epsilon 210 has a 57mm circle of coverage, one might assume you 
can't use a 6x7 cm format with it, but you can. The 6x7 cm format is 60 x 
70mm to the outside of the film edge. The actual live image area is slightly 
less. So if an image with the Epsilon 210 was placed on a 6x7 cm frame it 
would be a circular image 57mm in diameter, going from frame edge to frame 
edge in the short dimension and about 5-6mm short on each side of the long 
dimension. All optical systems produce circular images which get cropped by 
the mechanical film gates of the particular cameras. Depending on the optics, 
the complete circular image may be very usable and even interesting.

This is the case with my Schmidt camera when using the Vehrenberg film 
holder, which produces a 10 degree circular sky image.

Although we are enculturated to see photographs as rectangles, I think 
circular astronomical images are neat.

Kent Kirkley
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