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help with newt optics etc
Hi folks, I got myself a cheap Bintel 8' f5 recently (well ordered in May, arrived last week). I also bought the GSO 2" coma corrector.
I tried to collimate with a laser, then took this picture canon 1000d with 20mm of spacer plus M48/M42 step down ring (thin)on the coma corrector.
Now i have read various threads regarding spacing for this CC- either 75mm or 80mm or 55mm!
My question
does this pic represent
?poor collimation?
bad coma corrector spacing?
Pinched optics?
a mix of all the above?
I was guiding with a zwo mini guide scope at 0.20-0.30 RMS so hope it wasn't polar alignment, and it seemed balanced ok on the PMX.
Help please before I buy more astro bits and bobs!!
Graz
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