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Originally Posted by RAJAH235
Matt is spot on as usual...ummm, with all your 'supplied accessories' in use, you are definitely overpowering the t'scope. Even in good conditions I & (most I would say), never go anywhere near their max theoretical mag. eg; 10" dob = 500 x = no way Jose.
I normally view at about 120/180 x .....with good seeing conditions can go to 250/300 x, maybe a tad more...  L. |
Ahh sorry I did not make my self clear I appreciate that on a very good day (and not many are) a max of 225(50/inch)- ooh at a real pinch 270 (60/inch) is the best. If it is a 700mm fl then this is 3.1-2.59, if 900 then 4mm-3.33mm.
I have actually tried to use the X3 barlow (black plastic ) with the 4mm Sr on the moon and I could possibly have made out a crater or it could have been a water drop or midge.
I have since acquired a 9.7 meade and 25mm GSO plossel and bintel x2 bino which all work much better with a couple of filters. I did also try the 4mm SR with its woefull fov and tiny eyepiece in the x2 bintel barlow and the moon looked rather spectacular although focus was diffficult (x450-350). and the moon moves fast! Not really practicable generally though.
I um and arrgh betwen an Vixen LV 2.5/4mm, one of the Orion Stratus/Hyperion 3.5mm clones, or an Epic ED-2/clone 3.7mm.
cheers
Wol