On 2005-05-23, Longfellow wrote:
snip

Thanks for the responses!

I conclude that mixing usages is not a good idea. Conflicting
requirements for focal length, objective size, mounting architecture,
etc, would seem to doom such things to mediocrity. And mediocrity is
rather quickly discerned and so becomes unacceptable.

I looked into amateur astronomy a few years ago, and decided that a 12
inch Yolo schiefspeigler would be an excellent instrument. IIRC the
primary is a parabola mounted slightly off axis, and the secondary is a
slightly distorted plane. Seems buildable with care and patience.

Unfortunately, terrestrial scopes need aperture to make action
photography doable, and that means expensive gear suited for the
purpose.

Another bad idea to stand down amongst the host of other such I've come
up with over the years...

Thanks again.

Longfellow