Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Coma Corrector Info For RFT's

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Tom Soden/">Tom Soden on June 24, 1999 23:22:02 UTC

: Hello : Televue makes a richfield corrector for fast newtonians I have 2 : one for visual and one for prime focus astro photo. you might find a 2" big barlow : and the paracore will work fine, my newt is f3.8 and with the paracor visual is very nice : minor coma like that of an f7 exists at prime focus photo. : Hi,

: I am planning on putting together a 12.5" F2.92 RFT : (primary is a C/Cass mirror)and was wondering what can I do about the coma? would a Celestron CC work? or do I need a special CC to cover a full 45mm dia. circle of illumination which is the diagonal of a 24 x 36mm 35mm frame. Any help guys? Secondary is 3.1".


: Jim

Follow Ups:

    Login to Post
    Additional Information
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
    Forum posts are Copyright their authors as specified in the heading above the post.
    "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
    are trademarks of John Huggins