"Robin Leadbeater" wrote in message
...

"Derrick Farley" wrote in message
...

SNIP
So, whatever you call them, they are a significant improvement over the
standard SCT: the RCX scope are f 8 versions of this design whilst the
new scopes are f 10 versions of the same design. The new scopes have
the "pseudo RC" optics in the standard GPS tubes and are available in
fork mounted and OTA only versions.


It would be interesting to put one up against the Vixen VC200L which has
been around for years and has a significantly better flat field and off
axis
performance compared with the SCTs

Robin
In the F/10 version, the field curvature on these Meade 'SCT-GT' scopes,
will be poor (the RCX units, have a slightly less agressive primary
curvature, and give better field curvature performance). I must admit I am
suprised that Meade has not launched a field flattener for the scopes.
Something priced in the order of their focal reducers, that flattened the
field on the RCX, and on these newer scope, is an essential accessory for
larger CCD's and film use, which is still missing.

Best Wishes