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 Wes James Carpal Tunnel Reged: 04/12/06 Posts: 2519 Vixen BT80M bino collimation help needed       #1080151 - 08/06/06 11:16 AM Edit   Reply   Quote Quick Reply   I recently purchased a pair of Vixen BT80M binoculars that need a bit of touch-up on the collimation. Anybody have any assistance to offer here as to how to do it? Can it be done by a user? Searched the site, found nothing- when I Googled the subject, I came up with a couple of hits for the instruction manual for these- but nothing clicked when I tried to view it. Indicated it had downloaded a file, but it wouldn't display. I'd appreciate any help anyone has to offer on this topic. Have touched up my Oberwerk 25x100's hope it can be done as easily! Thanks! -------------------- Wes Atlantic Beach, FL Some bino’s from Miyauchi 5x32 Binon's up through Garrett 20x110 Signature's, Some telescopes from a Stellarvue 80mm NHNG up through a couple of 8” reflectors… And a wonderful 4.25" Delmarva Shiefspiegler! Some good friends, made here on C/N. Oh- several cats and a wonderful wife! Anyone want a cat???? :-O "When your work speaks for itself- Don't Interrupt" -Gamble Rogers Edited by Wes James (08/06/06 06:28 PM) Post Extras:       cota_scope sage Reged: 05/16/04 Posts: 356 Loc: sioux city ia Re: Vixen BT80M bino collimation help needed [Re: Wes James]       #1080534 - 08/06/06 04:16 PM Edit   Reply   Quote Quick Reply   try looking underneath the rubber grip around the prism assembly, there might be some collmation screws not for sure though.or there might be some tiny collimation screw around the bottom of the helical focusers, regards john Post Extras:       zx12 super member Reged: 12/29/05 Posts: 153 Loc: Rhode Island Re: Vixen BT80M bino collimation help needed [Re: Wes James]       #1080644 - 08/06/06 05:55 PM Edit   Reply   Quote Quick Reply   Hi Wes, I have a set of Vixen BT 125 binos that use interchangeable eyepieces like your BT80. The instruction sheet that is provided with it gives a simple solution to slightly mismatched images at higher magnifications. Basically, you unlock the collar and rotate either eyepiece until the images merge. Try it while viewing Jupiter as it helps to have a target that is somewhat bright and sharply defined. It works very well in my Oberwerk BT 100 as well. This should solve your problem unless you have a severe alignment issue with either the prisms or the objectives themselves. Mike -------------------- AP 160 Starfire/AP 1200GTO Stellarvue SV809D Vixen BT 125 HFT-MA Oberwerk BT 100/45 Tak 22x60 Astronomer Nikon 10x70 FMT-SX Leica 8-12x42 Duovid WO 66mm SD Post Extras:       Wes James Carpal Tunnel Reged: 04/12/06 Posts: 2519 Re: Vixen BT80M bino collimation help needed [Re: zx12]       #1080701 - 08/06/06 06:32 PM Edit   Reply   Quote Quick Reply   Thanks for the reply, John- and Mike as well. I tried rotating the eyepieces last night- and did it, as a matter of fact while looking at Jupiter! The moons provided a good target. It didn't really help- however the eyepieces I'm using are matches Sieberts... and, assuming they really are closely matched, might not make much difference being rotated- I don't know. Simply speculation on my part. However- I did find- this afternoon- instructions on these bino's online, and they have collimation instructions- so will have to have a closer look and see what they say. Should be able to correct the problem with them, thank goodness! Thanks for the replies, guys- -------------------- Wes Atlantic Beach, FL Some bino’s from Miyauchi 5x32 Binon's up through Garrett 20x110 Signature's, Some telescopes from a Stellarvue 80mm NHNG up through a couple of 8” reflectors… And a wonderful 4.25" Delmarva Shiefspiegler! Some good friends, made here on C/N. Oh- several cats and a wonderful wife! Anyone want a cat???? :-O "When your work speaks for itself- Don't Interrupt" -Gamble Rogers Post Extras:       Wayne Parrish sage Reged: 02/23/04 Posts: 442 Re: Vixen BT80M bino collimation help needed [Re: Wes James]       #1084352 - 08/08/06 07:56 PM Edit   Reply   Quote Quick Reply   Wes, What was the link to instructions on collimating the BT80.s ? If you'd rather I can send a PM. Thanks, Wayne Post Extras:       Wes James Carpal Tunnel Reged: 04/12/06 Posts: 2519 Re: Vixen BT80M bino collimation help needed [Re: Wayne Parrish]       #1084577 - 08/08/06 10:05 PM Edit   Reply   Quote Quick Reply   Hi, Wayne- The link was: http://www.buytelescopes.com/container.asp?dest=/manufacturers/vixen/vixen_product_pdf.htm Wes Post Extras:       Wayne Parrish sage Reged: 02/23/04 Posts: 442 Re: Vixen BT80M bino collimation help needed [Re: Wes James]       #1086618 - 08/09/06 10:19 PM Edit   Reply   Quote Quick Reply   Thanks Wes ! I have saved it for future use.Now that I know how to collimate them I may try another pair. Wayne Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 7 registered and 15 anonymous users are browsing this forum. 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