>I have a 8" f/10 LX200.
....what is the maximum practical
>magnification I can expect to use and still have clean and crisp images?

'Pends on what you want to look at. Galaxies are non-crispy at all mags., so
you can push those as high as you want in order to see structural details
that
would be invisible at a mere 50 per inch. Sea gulls or insects a hundred
yards off
tend not to be seeing limited, so 500X isn't unreasonable. Planetary and
double star crispness is almost always limited by seeing, around here, to no
more than 225X.

One day last week, the seeing allowed incredibly sharp images
at 300x and I was really sorry that I sold my 4.7 mm (425x) a while
ago. It's true that such good seeing is very rare (here), so you'd think
that lack
of the 4.7 mm could be easily endured. However, when the seeing is that
good, it hurts so much not to be able to take advantage of it that the pain
on average justifies having a very seldom-used eyepiece. I just took
delivery, today, of a replacement 4.7 mm AND a 2x barlow. The seeing
tonight was the usual
200x variety, of course, but what the hey. At least I was ready for the best.

RP
Pittsburgh PA

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