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Gary, welcome to the world of off axis pain
and suffering. I use a 2x barlow for my visual guiding, 3x is too much and
makes the stars much too faint. Just remember to calculate your maxium
guiding tolerance and be able to see it clearly in the guiding eyepiece is the
key. so if your tolerance is 5 arcsec, know what that looks like by
spliting doubles in the guiding eyepeice. Try epsilon lyra for
example.
Chris
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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