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Pages: 1 hokkaido53 member Reged: 05/07/12 Transit of Venus       #5211004 - 05/07/12 08:49 PM Edit   Reply   Quote Quick Reply   Is it possible to view the transit of Venus with a pair of 10x50 binoculars? If not, what is the minimum magnification required? I'm assuming the binos will be used with an adequate solar filter. Thanks, in advance, Roy Post Extras:       Tom and Beth Carpal Tunnel Reged: 01/08/07 Loc: Tucson, AZ Re: Transit of Venus [Re: hokkaido53]       #5211370 - 05/08/12 01:00 AM Edit   Reply   Quote Quick Reply   That's about what a properly filtered finder would show, and a 50MM will resolve to about 2 arc seconds. So yes, it WILL show Venus, but it will be very tiny at the 10X you are viewing with. The Sun will also be small. If you are traveling and space is at a premium, can you fit something like the 72MM Apo as sold by AT and WO? Post Extras:       brianb11213 Postmaster Reged: 02/25/09 Loc: 55.215N 6.554W Re: Transit of Venus [Re: Tom and Beth]       #5211474 - 05/08/12 05:21 AM Edit   Reply   Quote Quick Reply   Should be visible with the naked eye (shielded with eclipse glasses). Of course the more magnification you can get the better the view will be. You need about x100 to show solar surface granulation which is the sort of level of detail which the atmosphere will usually allow you to see, some of the time. Post Extras:       REC Carpal Tunnel Reged: 10/20/10 Loc: NC Re: Transit of Venus [Re: brianb11213]       #5212493 - 05/08/12 05:22 PM Edit   Reply   Quote Quick Reply   I'm getting pretty good size of the Sun at 45x and the Sunspots are very clear. The current set of spots are bigger than Venus will be I think. Post Extras:       PhilCo126 Carpal Tunnel Reged: 01/14/05 Loc: coastline of Belgium Re: Transit of Venus [Re: REC]       #5214094 - 05/09/12 04:02 PM Edit   Reply   Quote Quick Reply   Of course but protect your eyes and equipment with a good solar filter. If You use a filter in front of the telescope, make sure it's good attached! Basically there're two filter versions: visual (ND 5) or photographical (ND 3.8) version. The latter one has 10x more transmission and allows short exposure times. Post Extras:       great lesson sage Reged: 04/04/10 Loc: Canada Re: Transit of Venus [Re: hokkaido53]       #5218607 - 05/12/12 11:52 AM Edit   Reply   Quote Quick Reply   I went to a lecture last night on the transit of venus. The Prof explained that a good indication to whether you can see the transit is to take a look at the sunspot 1476 right now. Venus will be around the same size when the transit occurs. Granted you need the proper equipment -filters, solar glasses, binos, or what ever Post Extras:       Snickersnee member Reged: 08/29/08 Loc: California Re: Transit of Venus [Re: great lesson]       #5218946 - 05/12/12 04:16 PM Edit   Reply   Quote Quick Reply   Right now if you can see spot group 1476 filtered with your naked eye you have an excellent chance of seeing Venus the same way on June 5. I've seen it easily several times in the past week. I saw the Transit in '04 thought mists in Baltimore. It dimmed the sun enough that I did not need any filter. I'm confident I'll be able to see it through my sun goggles this time. Post Extras:       john gabriel sage Reged: 12/13/11 Loc: Southern California Re: Transit of Venus [Re: Snickersnee]       #5219187 - 05/12/12 07:10 PM Edit   Reply   Quote Quick Reply   If I use a projetion screen (as originally provided with Edmund 6" reflector in 1970), do I need any filter at all? Post Extras:       Snickersnee member Reged: 08/29/08 Loc: California Re: Transit of Venus [Re: john gabriel]       #5219193 - 05/12/12 07:20 PM Edit   Reply   Quote Quick Reply   Nope. Just be sure to use an air-spaced simple eyepiece like a Ramsden or Huygens or else you may cook its cemented elements. Post Extras:       azure1961p Postmaster Reged: 01/17/09 Loc: USA Re: Transit of Venus [Re: john gabriel]       #5219781 - 05/13/12 07:47 AM Edit   Reply   Quote Quick Reply   Quote: If I use a projetion screen (as originally provided with Edmund 6" reflector in 1970), do I need any filter at all? Im not familiar enough to say yes to it - if Im wrong - well you know... But - If this is the kind of screen that the eyepiece projects onto like a miniature movie screen yes its safe. Its amazing just how much detail can show when projecting the sun in such a manner. Even my 4 1/4" Edmund reflectir as a kid revealed granualtion quite amazingly. It never harmed the Edmund barlow or kellner eyepiece. I think thats the only real hazard - a cracked lens. Ive never done the projection thing with any scope now strictly for that concern. Pete Post Extras:       Rick Woods Postmaster Reged: 01/27/05 Loc: Inner Solar System Re: Transit of Venus [Re: azure1961p]       #5221071 - 05/13/12 10:44 PM Edit   Reply   Quote Quick Reply   I watched the transit of Mercury in - 2008, was it? - through 11x80 binoculars, with the sun's image projected on to a sheet of paper. Mercury was very clearly seen that way; so you should have no trouble seeing Venus. Post Extras:       Snickersnee member Reged: 08/29/08 Loc: California Re: Transit of Venus [Re: Rick Woods]       #5221113 - 05/13/12 11:27 PM Edit   Reply   Quote Quick Reply   Mercury in 2006 was much more difficult a target for any optical system than Venus will be in 2012. Post Extras:       hokkaido53 member Reged: 05/07/12 Re: Transit of Venus [Re: Rick Woods]       #5292887 - 06/28/12 09:12 AM Attachment (38 downloads) Edit   Reply   Quote Quick Reply   I was able to view the transit, thanks to the local astronomy club in downtown Victoria, BC. One of the members had constructed a scope from a plastic pipe and some lenses, and then projected the solar image onto some stiff cardboard. I photographed that projection with my Kodak Z950 camera. Post Extras:       400years member Reged: 02/15/09 Loc: Cape Cod, Ma. Re: Transit of Venus [Re: hokkaido53]       #5292890 - 06/28/12 09:15 AM Edit   Reply   Quote Quick Reply   Hokkaido, that is a great picture!!!! I'm going to copy it. Post Extras:       Snickersnee member Reged: 08/29/08 Loc: California Re: Transit of Venus [Re: 400years]       #5322746 - 07/17/12 09:58 PM Edit   Reply   Quote Quick Reply   Postscript: I watched the TOV in 5 and 8 inch scopes for St George UT. During my session, a man walks up with a 10x50 pair of $20 binos, an equally cheap tripod and a box and a piece of white butcher paper. The Black Dot was clearly evident. Post Extras:       Pages: 1

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