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Hi Bojan,
I purchased my f5 and never looked to see what the coma presented.
In reflection I wish I had worked with non coma corrected so I had something to look at the improvement.
I would try without which may tell you certain things.
In any event within software there is probably a tool that would enable a reasonable correction...You could see it as a chalenge to fix coma via softeware maybe.
And if you know what you are working with and know what will work for you. ..you woll know what to look for as a good buy in the classifieds.
I have not even colrrrminated this ...well was new...8 inch f5...but my thing has been to take something..the cube is working a treat..its warmer for a start and pack up a zip...and this is allowing me to get auto guiding sortted...so much to do...
Stick the scope on the mount and see what you are working wiuth ..crop and twiddle and post a resultalex
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