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good idea to use a Bahtinov mask as Richard suggests.
also, you are pushing uphill using manual focusing at f5 - you have less than 100microns to play with if you want to get diffraction limited results. At f5, the tube length fluctuations with temperature will be significant - particularly if it is aluminium - will need regular refocus in varying temperatures.
Star testing is easy to do and will soon rule in/out any major optical problems.
You have what is likely to be a crackerjack scope - should be great when you get focusing sorted - everything else is looking good
Regards Ray
Last edited by Shiraz; 12-10-2013 at 07:25 PM.
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