Re: [APML] Optimal 35mm/CCD SCT imaging setup

[Duncan Munro <dmunro@sfu.ca>]

I guess it would help to give the URL:

www.sfu.ca/~dmunro

Duncan Munro wrote:

> I am in the process of  preparing my new web page. In the meantime I 
> have prepared a couple of photo essays on creating minimum length ( to 
> minimize EFL, EFR, vignetting, and balance problems ) 35mm 
> astrophotography  setups.
>
>
> The opening page illustrates the use of an custom eyeopener style 
> visual back and a Lumicon NEG. It also demonstrates the use of the NEG 
> with a 2" barrel adapter for use on C-8/9.25 size SCTs.
> The second page illustrates the use of a NGF-SE and a F6.3 focal 
> reducer. The reducer is used as the SCT rear cell adapter to minimize 
> the length of the imaging train and so keep the focal plane at the 
> correct distance from the SCT rear cell and from the rear of the focal 
> reducer assembly. This arrangement will also minimize balance problems 
> as well. I suspect that megapixel CCD cameras would particularly 
> benefit  from this arrangement.
>
> clear skies
>
> Duncan Munro
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>
>


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo