Re: [ATM] My scope

[Dan Harriman <kc5gxl@sbcglobal.net>]

Gerald;

F-8 is usually considered a 'planetary scope' and f-6 and faster 
(richest field scope, RFT) is more of a deep sky type of scope. The 
reason for this is that the f-8 gives a smaller field of view than an 
RFT, allowing the planets to appear bigger in the eyepiece, and 
thusly see more detail. The RFT will allow a larger field of view 
(FoV) to see more of the deep sky objects, which usually cover a 
larger portion of the FoV than a planet or asteroid, etc.

Either focal length will work very nicely for an 8" mirror. An f-8 
doesn't take as long to grind as an f-6. Personal preference is the 
name of the game on smaller scopes.

Hope that helps some.

Clear and dark skies,

Dan Harriman
Orange, Texas

At 10:57 8/22/2007, you wrote:
>snip.....
>
>BTW it's an 8" mirror.  What focal length would be good for viewing 
>the planets and deep sky images?
>
>Gerald

If at first you don't succeed, maybe you shouldn't try sky diving!

dit dit 


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