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Mat,

The lowest power you can effectively use with an 8" scope is 28x. That
magnification would yield a 7.1mm exit pupil. Any lower power would be empty
magnification, since the exit pupil diameter in the eyepiece exceeds the
size of the pupil in the human eye, 7.1mm. If you're not 18 years of age or
younger your eye is more than likely considerable smaller. But let's assume
you can effectively use 28x. If the eyepiece you use at that power has a
55-degree apparent field of view (the largest apparent field possible with
1-1/4" eyepiece at that power), the actual field would be
2-degrees. That's a whoppingly large field for a telescope, but miniscule
for binoculars. I think the moon and Mars will be more in the order of
2.25-degrees, conformably in the range of any descent binoculars or small
telescope. You might have to s-t-r-e-t-c-h the field to capture them both in
your 8". Thanks for telling us about June 19th. I'll put it on my calendar.
Of course we all know it'll be cloudy that night.

Kent Blackwell