"nytecam" wrote in message
...

It works at f/10 and looks like a regular LX200 so is it more than a
wide-field RC corrector plate? Intregued! See
www.telescopehouse.co.uk/

Nytecam 51N 0.1W


--
nytecam

Meade don't say an awfull lot about the RC design. A search dug this up
though. Thought it might be worth sharing?

http://www.astronomy.com/asy/default.aspx?c=ss&id=9

Ritchey-Chrétien
This telescope design was developed jointly by American optician George
Willis Ritchey (1864 - 1945) and French optical designer Henri Chrétien
(1879 - 1956) in the first decade of the 20th century. These two telescope
designers found that the lower the amplification factor of the secondary
mirror, the flatter the field. The Ritchey-Chrétien system has a secondary
mirror that magnifies 2.7x, whereas the Schmidt-Cassegrain design has a 5x
secondary. The Ritchey-Chrétien design is coma-free, whereas the
Schmidt-Cassegrain is not. Ritchey-Chrétien telescopes have hyperbolic
primaries and secondaries that correct for coma; production-type
Schmidt-Cassegrains use a spherical primary and secondary and do not correct
for coma. Finally, the Ritchey-Chrétien design has two optical surfaces. All
Schmidt-Cassegrains have four. Why are Schmidt-Cassegrain telescopes more
popular (by far) than Ritchey-Chrétiens? One word: price. A Ritchey-Chrétien
telescope is quite costly to produce and, therefore, expensive to buy.

Regards


Chris