[APML] A beginners question

["I.J Jordan" <ian@sunhouse.plus.com>]

Hi All

Being a total newbie to astrophotography,and still in the process of 
getting the bits and pieces together I would appreciate some thoughts 
on something.

Apart from their being on perhaps the "slow" side:on average f8,are 
there any other inherent problems involved in using a mirror telephoto 
lens for astrophotography when piggy backed on a telescope.I feel that 
there maybe because after a look through the archives it would seem 
that although a number of people achieve some stunning results by piggy 
backing a camera and telephoto lens,I see no mention (unless I am 
looking in the wrong place) of the use pf "mirror" lenses.

My reason for asking is that my wife uses a 500mm f8 mirror lense for 
her wildlife photography,and I wonder if it would be practical for me 
to use it during the winter for astro-photography.

Looking forward to any thoughts or suggestions

Ian & Linda Jordan
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