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Well, last night i took some images and to my supprise, the optics produced round stars pointing low in the sky. First i used the Ha filter, things looked good. then i switched to the red filter and there was no change from the Ha. I think the Lum also produced round stars.
So im a little confused about whats going on here - i didn't change anything on the scope. I determined my collimation held from one horizon to the other by slightly defocusing just enough so i could see the poisson spot in the centre. this remained centre from one side of the sky to the other. that's fantastic news. see bellow. one at zenith, one at low south and one at low north. beats me why they wont all go as thumbnails?
Does anyone think it could be something to do with atmospherics? there are no buildings around me, i shoot out in the bush.
thanks
Josh
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