Re: [APML] Coma corrected SCT

[Duncan Munro <dmunro@sfu.ca>]

My test shots weren't tracked well enough to give any concrete results. 
I can say that nothing bad seems to be happening and that I'm getting 
reasonable illumination across the frame.

cheers

Duncan

Duncan Munro wrote:

> 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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>


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