Quote:
Originally Posted by casstony
Probably best not to test at the limits of seeing - drop the magnification back a little so you've got a more stable image to assess.
The star test on my TSA120 is the nearest to perfect I've seen on any scope, with the symmetry on either side of focus holding all the way down to the last ring as focus is approached and no false color, though colour can be seen at times due to atmospheric conditions.
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Exactly how I would describe my experience/tests with my TSA120
In order of decreasing probabilities I would say,
Observing conditions (including system acclimatisation)
Eyepiece
Fault with that particular TSA120