Re:[APML] Film and OAG Questions

[Duncan Munro <dmunro@sfu.ca>]

Hi. Are you using a Newtonian Easy Guider or the longer SCT easy guider? I
am able to reach focus quite nicely with my NEG,a 12mm ortho EP and a short
barlow. I prefer the UO Klee 2.8x Barlow. Using a high quality barlow does
not degrade the image nor reduce the star brightness by much. Since you are
using a 10mm EP I would guess that a short 2X barlow would work well for
you. I find that I can use longer focal length EPs for guide star selection
and centering and then I can pop my barlow and 12mm EP combo in to begin the
actual guiding.

Cheers

Duncan

"Hello,
    I bought a roll of Fuji Superia 800 and was shooting with it at a
festival today.  I didn't use all 36 exposures and was wondering if this
film is any good for astrophotography.	I've forgotten what it actually said
on the film cannister itself, but on the film tube it came in it reads--Fuji
Superia CZ135-36 800 ISO.  Just wondering if it's worth my time to finish
the roll under the stars or not.
    I have a Lumicon 2" Easy Guider and the (Lumicon) recommended 3X Prism
Diagonal.  I guide with a 10mm illuminated reticle.  I'm using a 480mm f/6
80mm achromat.	My problem is not so much in finding a guidestar (although
that is a challenge at times), but having one bright enough that I can
actually see well enough to guide with, without having to use averted
vision.  Is there a reason for using a prism instead of a star diagonal?  I
realize having a 3X magnification is going to make the guiding easier and
more accurate, but would I get brighter guide stars by using a star diagonal
and 2X barlow?	Would I be able to focus the guidestar with this set-up? 
The sky here is socked in or I would try it out.  I'd appreciate any
thoughts or knowledge anyone might bestow upon me."
 
Gary 



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