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Hi I have bought a skywatcher MN190 recently as the collimation appears a little off yhink need to collminate, assumed that there would be locking and adjustment screws on the primary but theee are are only 3 assumed adjustment stews, though there are 3 screw holes for locking??? is this correct??? or should there be 3 locking Screws and 3 adjustments? the included ‘manual’ is useless no information on this. cant find much useful info on doing this on MN’s assumed Colimation would be more less same as Newtonian- is that correct?
Hi, can I please ask for some help/advice on imaging DSOs with a webcam and laptop? Last night was the first night for quite a while that I have been able to get out and use my new 'scope. I used it about a month ago to look at the Ring Nebula (M57), Dumbell Nebula (M27), The Great Globular Cluster (M13) in Hercules amongst others and was waiting for the chance to do some imaging. Well, last night I got my chance and set the 'scope up, let it cool down, did an alignment with an additional 3 calibration stars. I then got the mount to swing to M57, got it right in the middle of the eyepiece and then swapped to the webcam (Philips SPC900NC) and...nothing. I tried again and again swapping between the eyepiece and the webcam, adjusting the focus, changing the gain, exposure, brightness and the other one which I can't remember at the moment and...nothing. I even focused the webcam on Vega and then swung to M57 so I at least knew that the focus should be right, but then I couldn't tell if the 'scope had swung dead on to the nebula! PLEASE...what am I doing wrong? Or am I just expecting too much from my set-up. Will I never see a DSO on a laptop screen due to their low light levels? If that is the case how do you know that you have got your subject in view? It was really frustrating and probably caused me to pack up sooner than I would otherwise have done as it was reasonably good seeing and nice and warm with no dew build up. Any comments, suggestions would be greatly appreciated as I am intending on going out again tonight.