You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Lunar Observing Previous   Index   Next   Threaded   Pages: 1 danm sage Reged: 04/27/08 Posts: 231 Loc: Northern California Too bright even with ND filter in 66mm refractor       #2459807 - 06/14/08 11:55 AM Edit   Reply   Quote Quick Reply   Hello, I'm starting out with lunar observing in a weenie AT66 refractor. Seems like this should be a great combo, but even with an AT #ND-3 neutral density Moon filter it's too bright. I have a big spot in my eye after viewing This is listed as a 50% filter, and it's with a very small aperture, what other options are there? Thanks for any suggestions! Dan -------------------- TV Ethos 13mm Oberwerk Ultra 15x70 Celestron C6 f/10 & AT Voyager Alt/Az mount 8" f/6.3 Newtonian (Dad's ATM) & AT66 red tube 12.5" f/4.1 Telekit (Dad's ATM Mirror) Post Extras:       Petewp super member Reged: 12/04/06 Posts: 185 Loc: Connecticut - central western Re: Too bright even with ND filter in 66mm refractor [Re: danm]       #2460430 - 06/14/08 06:36 PM Edit   Reply   Quote Quick Reply   Honest - just stack another filter. For me though, I just deal with the glare in my 70mm Ranger. Oh sure, theres that spot in your eye but it's altogether nonharmful. Infact i recall someone saying that through a medium sized aperture the mon presents a disc as bright as macadam [asphalt] under a noon sun. I'd just disregard it and leave it be. My fav moon filter for a really bright moon through my 8" is a neutral density [forgot the percentege] and very importatly, a WRATTEN 21 Orange. That warm orange is just fantastic and the brightest peaks seem to pop with contrast the moment i put that setup in. I love the W21. I'd get over the spot thing. Pete -------------------- SEEKING LUNAR/PLANETARY NEW ENGLAND OBSERVING NIGHT - all welcome. Contact me at tidalid@aol.com 8" F/9 Parks Reflector 70mm TeleVue Ranger Previous owner of Parks 10"F/5, Post Extras:       walt r Carpal Tunnel Reged: 02/13/07 Posts: 2421 Loc: Doylestown, PA Re: Too bright even with ND filter in 66mm refract [Re: Petewp]       #2460512 - 06/14/08 07:36 PM Edit   Reply   Quote Quick Reply   Try the Moon through my 18" Obsession without a filter. Whoo, that eye needs 10 minutes to recover so I can find my way back to the house. -------------------- Walt Obsession 18" f/4.45 #1370 AN/SC MK67 Deluxe 6" f/12 Mak-Cass, Super Polaris GEM, JMI MicroMax DSC DIY 60mm f/6 Achromat Cookbook 245 CCD Post Extras:       wirenut sage Reged: 09/21/06 Posts: 467 Loc: m'dale Pa Re: Too bright even with ND filter in 66mm refract [Re: walt r]       #2460681 - 06/14/08 09:47 PM Edit   Reply   Quote Quick Reply   varible polarizing filter might help more but the ones I just looked at only go to 40% I forget what mine is lately when I'm observing a bright moon is grab some dark shades -------------------- 8"GSO dob 8,17 mm hyperions & FT rings 21mm stratus 25,15,9 mm plossls ultima barlow Post Extras:       Tim2723 The Moon Guy Reged: 02/19/04 Posts: 5121 Loc: Northern New Jersey Re: Too bright even with ND filter in 66mm refract [Re: wirenut]       #2463163 - 06/16/08 11:15 AM Edit   Reply   Quote Quick Reply   Try the Orion Variable polarizer. In its 'closed' position it's nearly black. The effect of 'moonblindness' is inconvenient, but not harmfull, but a VP filter will increase your comfort considerably. Increasing magnification, assuming the view will tolerate it, will also dim things down. -------------------- The crwth will set you free! Post Extras:       Bill Weir scholastic sledgehammer Reged: 06/01/04 Posts: 894 Loc: Metchosin (Victoria), Canada Re: Too bright even with ND filter in 66mm refract [Re: Tim2723]       #2463210 - 06/16/08 11:44 AM Edit   Reply   Quote Quick Reply   Are you observing from home? If so, try turning on lights around you. I find that if I turn on all of the lights and as long as there isn't glare across the eyepiece I don't need any filtering at all. I have a decent variable polarizing filter but barely ever use it. This is when I use my 6" or 12.5" dob. Bill -------------------- 6'' Orion SkyQuest 12.5'' f/5 Custom Truss Dob William Optics 80mm ZenithStar II ED Doublet f/5 25" newtonian on a giant GEM, any time I want Observing sessions grand total for 2007, 171. So far in 2008, 115 Post Extras:       kfred Carpal Tunnel Reged: 11/11/03 Posts: 2005 Loc: Dayton, Ohio Re: Too bright even with ND filter in 66mm refract [Re: Bill Weir]       #2469097 - 06/19/08 04:43 AM Edit   Reply   Quote Quick Reply   Try using an 80A Blue filter; or as others have suggested stack filters. Fred -------------------- River Cam - Cambridge England Post Extras:       revans scholastic sledgehammer Reged: 09/26/05 Posts: 811 Loc: Fitchburg, MA Re: Too bright even with ND filter in 66mm refract [Re: walt r]       #2489471 - 06/29/08 10:39 AM Edit   Reply   Quote Quick Reply   I know what you mean... I once looked at the gibbous phase moon through a friend's 36 inch Obsession without a filter. Quite an experience... but the detail was just unbelievable and well worth the photonic overload )) (although next time I'd use a filter for sure). Rick -------------------- Rick Evans http://www.freewebs.com/revans_01420/ Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 1 registered and 3 anonymous users are browsing this forum. 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