[APML] Coma corrected SCT

[Duncan Munro <dmunro@sfu.ca>]

I tried out my Lumicon Coma Corrector tonight. I'm using it with a NEG 
and a 10" F6.3 SCT OTA. I can say that visually, the CC does work with 
an SCT as the off axis stars in the guider prism are much tighter and do 
not exhibit the typical coma flare. The on axis sharpness does not 
appear to be affected. I did some test expoures on Fuji 400 with my 
Nikon F2. I should have some rough results tomorrow.  If this set up 
works I should have a nice rig for film. In theory it should also work 
with an f10 OTA as well. The CC will not help the field curvature but 
the F6.3 OTA has a flatter field than an F10 setup.

I am still working the kinks out of my autoguider setup as my 208xt 
requires about .8 mm more in-travel than the NEG will permit. Time for a 
trip to the machine shop... It's kind of frustrating as I'm waiting for 
a Star2000 module to arrive in the mail so I can use my MX516 an an 
autoguider as I know it will focus with the NEG.


cheers

Duncan
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