Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Binoculars Previous   Index   Next   Threaded   Pages: 1 xcy super member Reged: 05/15/06 Posts: 102 Loc: Europe Light interference problem?       #1256547 - 11/17/06 03:34 PM Edit   Reply   Quote Quick Reply   I own two old Japanese-made binoculars that have a similar problem. When viewing through either of the two binoculars the image has what i could best describe as glare near the centre of the view. At first I tried cleaning the lenses, but after taking both binoculars apart and inspecting all lenses and prisms I realized that the source of the problem should be something else. After doing some investigation I found that some binoculars have light interference problems caused by either prism leaks or by light that is trapped inside the barrels when the optics are poorly coated or uncoated. I was wondering if such a problem could be fixed. Post Extras:       Mark9473 Carpal Tunnel Reged: 07/21/05 Posts: 2695 Loc: 51°N 4°E Re: Light interference problem? [Re: xcy]       #1256551 - 11/17/06 03:39 PM Edit   Reply   Quote Quick Reply   Don't know if this is the same, but I have an old pair that has what I would describe as a halo around bright objects. I believe this to be due to some sort of haze on the prisms, possibly from some moisture having seeped in over the years. It's worse in cold weather. The glare you're seeing, is it always located in the same position relative to the light source, and does it mimic its shape? -------------------- Mark Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63 WO Megrez II 80 FD + Baader 90° T2 Amici Post Extras:       xcy super member Reged: 05/15/06 Posts: 102 Loc: Europe Re: Light interference problem? [Re: Mark9473]       #1256580 - 11/17/06 03:57 PM Edit   Reply   Quote Quick Reply   The problem is visible in daylight when observing any source not just a bright object, but it is also visible when viewing the Moon. I did check the prisms and could not see any visible moisture. I also tried blowing some hot air inside the barrels, but with no success. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 11 registered and 23 anonymous users are browsing this forum. Moderator:  EdZ  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 184 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

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