Quote:
Originally Posted by Matty P
Thanks for your reply Ian,
I will using my C8 on a Alt-Az mount so will a 30 second exposure be enough to capture any kind of detail?
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It's an 8" , sure unless it's faint (and faint comets don't show as much more than a fuzzy blob anyway) , but unless you are precisely tracking it (guiding) , with the focal length of those things , it will trail and with long exposures there is field rotation to deal with.
An equatorial , or a wedge for your altaz would be a good investment.
I got some nice photos on film (400 ISO) of McNaught last year with exposures as short as 15s but more detail with 5 and 10 minute exposures with my telephotos. Some were even with a camera just sitting on a fixed tripod (been a long time since I did that ... they worked out better than I expected even if there was some star trailing).