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Pages: 1 redlinedb16a member Reged: 10/17/10 Mirror Alignment and other questions       #5186062 - 04/23/12 09:48 AM Edit   Reply   Quote Quick Reply   Got my lx200 10" emc mirrors recoated by Spectrum Coatings,the Max-R coatings Mirrors are installed and alignment is near perfect with a star test But how do I get it better. I used a Meade 8-24mm zoom ep on the star test(Sirius ) and I've played with it several times.i feel it's close but not perfect yet. Is using the zoom ep not good for high power star test What causes defraction spikes?they were bad lastnight but I readjusted and they seem gone Saturn looks awesome thru the scope,I see 5 moons and Cassini easily On great Orion nebula the stars are always just out of focus,never sharp Mars I can barely see the ice cap,barely detail M3 looks beautiful The maxr coating pulls in a lot more color and light,the coating is nice My factory coating seen better detail on mars but less detail and moons on Saturn Should I be using a one size ep like a 4mm to star test rather than a zoom I'd have to borrow an ep Post Extras:       Chris Erickson Carpal Tunnel Reged: 05/08/06 Loc: Waikoloa Village, Hawaii Re: Mirror Alignment and other questions [Re: redlinedb16a]       #5195054 - 04/28/12 02:29 PM Edit   Reply   Quote Quick Reply   For collimation, just about any quality eyepiece should allow you to perform good star tests. Zooms have moving parts and more elements in them than an equivalent fixed-FL eyepiece, so they wouldn't be my first choice for star testing. Ortho's would be the sharpest for star testing but they have very narrow fields of view. Post Extras:       Pages: 1

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