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Focuser collimation on a refractor - do I have a problem?
Hi -
I have been unhappy with one corner of my Astro photos having enlongated stars when I use my sky rover 115 refractor.
To investigate, I cut a circle of paper based on the lens cover, created a centre by folding and carefully blue-tacked it onto my telescope.
When I inserted my laser collimator into the back, I see the point is not at the centre. I next tried this with the reducer/flattener in place and got the same result.
Rotating the collimator did not change the location of the point as the laser itself is well collimated.
Is this a problem?
Would this explain the slightly enlongated stars in one corner of my photos?
How do I solve this problem?
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