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Subject: Re: [M]: RE: 1220 Field De-rotater v Wedge
From: Bill Arnett
Reply To: mapug@shore.net
Date: Mon Mar 24 01:36:03 1997

At 8:01 AM -0800 3/23/97, Gary Campbell wrote:
>At 12:53 AM 3/23/97 -0800, you wrote:
>
>>>Wouldn't the Lumicon Giant Easy Guider be incompatible with the Meade
>>>Field Derotater?
>>
>>Clearly the GEG is to be first (closest to the telescope). IIRC, the FDR
>
>I'd have thought the order would be:
>FDR
>off-axis guider
>main camera
>?

The main point of the *Giant* Easy Guider is that it has a larger opening
that attaches to the back of the scope instead of the visual back (I
believe this works only with the 10" and larger scopes). This permits the
use of a larger focal reducing lens and reduces vignetting. So obviously
the GEG must be first. A "normal" off-axis guider would be in either order.

---
Bill Arnett              billa@znet.com           http://www.seds.org/billa/

  "I know that I am mortal and the creature of a day; but when I search
   out the massed wheeling circles of the stars, my feet no longer touch
   the earth, but, side by side with Zeus himself, I take my fill of
   ambrosia, the food of the gods." -- Claudius Ptolemaeus (Ptolemy)