Actually one thing I forgot to mention is that a mirror lock up is
very useful when performing eyepiece projection or prime focus
photography and that is vibration. The movement of the mirror can send
vibrations through a telescope which can take up to 3 seconds to die
down (on a really poorly damped scope). It is obvious how this can cause
problems, especially with high magnification images. One way of
overcoming it without using a mirror lock up is the hat method (or a bit
of black card!). Seems to have worked well for me every time.
The only problem I can think of with using a mirror lock up is that
when you activate the lock up you could knock the scope off the object
you are tracking and not know about it until the exposures are
developed. I suppose an off axis guider would help here, but that's more
expense!!!
All the best,
Gareth.
--
Gareth.J.Martin
Research Postgraduate
School of Geographical Sciences
University of Bristol
University Road
Bristol
BS8 1SS
g.j.martin@xxxxxxxxxxxxx
attackwarningred@xxxxxxxxxxx
eclipsing.binary@xxxxxxxxxxxxx
NE NLCOG - The amateur NLC observing group:
http://freespace.virgin.net/eclipsing.binary
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is to venture a little way past them into the impossible."
Arthur C. Clarke's Second Law.
"There is hopeful symbolism in the fact that flags do not
wave in a vacuum."
Arthur C. Clarke
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