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Post by galileo on Apr 8, 2015 15:07:11 GMT -5
I'm at the collimation stage of my build and bought a laser collimator to carry this out. I'm struggling to get enough reflected light from the back of the lens to catrry out a positive adjustment. Has anyone any tips or indeed a better way to collimate?
I did have a quick look thro the scope the other night and was getting quite concentric airy discs when out of focus, maybe I should leave well alone but I now need to fit the baffles so will have to remove the lens cell again, D'oh !! |
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Post by boomboom on Apr 17, 2015 2:42:18 GMT -5
Here is what I do. Use a Glatter laser to get the focuser in the centre of the objective. The I use a Cheshire eyepiece to get the tiny disc's to line up with the push pull screws on the objective. The last bit requires a lot of back and forth from both ends of the scope. Then I get nice round stars which sounds like you have already! Might be best to leave well alone?
Anyone else?
Matt
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Post by mikey cee on Apr 17, 2015 9:17:03 GMT -5
The optical center of the lens is not always straight thru the center of the OTA optical axis. Sometimes to negate any small amount of astigmatism you must realign the optical axis of the lens for best image....therefore your Cheshire images may not appear to be in alignment. I've learned that...it's kind of like trying to chase your tail.  Mike |
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Mike