From: "Mel Bartels" 
To: "ATM" 
Reply-To: "Mel Bartels" 


>>>
provided one can figure a nice 32" f/3 parabola. Is it possible to
make a coma corrector optimized for visual use that entends the focal
length to let's say
f/5 at the same time? This way reasonable magnifications would be possible
and the eyepiece would not have such a hard job to deliver good images.
<<<

Buchroeder at the Bellingham conference said that even f/2.5 with corrector
would be 'easy' 'straightforward' - if I recall properly he said you will
need a two glass corrector spaced a few inches in front of the image plane
for easiest designing.

Mel Bartels

--- BBBS/NT v4.00 MP