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Firstly, a 20mm EP with your scope only gives around 125x mag, which
will give a fairly small image of Jupiter. You need to use at least a 15mm,[166x] ,
and when the seeing is good, go to shorter ones such as 10mm [250x] or 8mm.[312x].
Silly question, but you haven't got a reducer in your optical train, have you?
Regarding your small photo images, hard to know, as I don't know if
you are using prime focus or EP projection, or what else.
raymo
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