Quote:
Originally Posted by Peter Ward
In short, if you think one of these new wunderkind devices will deliver perfectly round deep sky stars at 2500+ mm... with no guiding...it think you'd also be in for a big disappointment.
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Did you see the following example on the
website?
E.g. the attached photograph below (NGC1161) was captured by a 10 minutes' (!) long exposure using a 16" LX200R OTA (and SBIG ST-8) with 2.5m (!) reduced focal length on around 70 degrees horizon altitude without conventional autoguider and, as you can see, the shape of the stars are free of any kind of visible elongation or distortion.
Cheers
Dennis