Gaspard de la Nuit wrote:


There definitely is a market for this. There are people who will
spend
$30 000+ for an APO imaging setup (OTA, mount, camera, etc.) and
twice
that for an RC. There are two pieces of advice I can offer:
First, keep the final cost of the system under $10 000.
Second, you should try to make it work with F8 systems because most
off
the shelf Ritcheys are in this range. If it only woks with F10 or
longer then you will exclude most of your prime market.

Please state what APO and OTA stand for.
RC I suppose means Ritchey Chretien?

APO is short for apochromatic refractor. It is similar to a regular
refractor except it uses exotic glass types to reduce chromatic
aberration.
OTA stands for Optical Tube Assembly. In other words just the telescope
tube with the optics in it. "OTA only" is used to denote a
telescope without mount or eyepieces. Generally if you see a telescope
sold as "OTA only" it does not include a finder scope either. This
is how higher end telescopes are sold because typically when an amateur
finally decides to upgrade he or she already owns a mount and a
collection of eyepieces.

Ian Anderson
www.customopticalsystems.com