Guiding and Magnification?

From: Davoud (star_at_sky.net)
Date: 03/28/05 

Date: Mon, 28 Mar 2005 14:57:56 -0500

Conventional wisdom once held that the guide 'scope should have a
greater magnification than the imaging 'scope/lens by a factor of
(something or other.) With the advent of cameras that contain both
imaging and guiding chips, or that image and guide using the same chip,
this notion seems to have fallen by the wayside, and I haven't seen
this "old rule" mentioned in some time.

This is not an issue if I am imaging with my little Tele Vue 76
(particularly with the reducer/flatener is in place) while guiding with
my Meade 8". But what about the opposite situation -- won't it be
necessary to put a TV "Powermate" or a Barlow in front of the ST-4 when
it is mounted on the TV 76 and I am imaging with the Meade?

TIA

Davoud

(I don't actually expect to have the opportunity to *use* any knowledge
that I may gain in response to this post; I have just guaranteed
another six weeks of clouds in the Mid-Atlantic by taking delivery of
an ST-4 autoguider that I bought from a gentleman who advertised it on
AstroMart. Today's weather: flash-flood warning. Tomorrow: worse.) 

-- 
usenet *at* davidillig dawt com

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