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I took the 80mm refractor up to 250X in the early hours of yesterday morning. Image of Jupiter wasn't crash hot. Then I left the telescope there for three quarters of an hour to get it nice and cold. The image became pretty sharp, but detail wasn't that good. I applied a polarising filter which resulted in a bit more detail being seen on the surface - but still not as much as at 200X a week ago.
Next time get a good night. I'll try 217X and 227X and see what image that delivers.
Regards,
Renato
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