Jim,
that sounds like a good point to design around. Long enough F# to avoid
most of the off axis aberations, short enough you do not have to climb too high
on the ladder. It will still take up a fair amount of room for
transportation though.
Do you
plan on making the mirror yourself, or have Steve build it?
John Zeigler
John
for
110" I could go for a 20" mirror with a f5.5 ratio. That might be the best
compromise.
Thanks
Jim