Quote:I put this post in the reflectors forum a while back. Note the part about the view of jupiter.Someone here pointed out that the best high end planetary eyepiece is two cheap eyepieces in a binoviewer.
Quote: Someone here pointed out that the best high end planetary eyepiece is two cheap eyepieces in a binoviewer.
Quote: Of course my primary advice is that if you want to see more on planets, start with a big telescope.
Quote:I still think that the more meaningful difference is to be found with a better telescope.
Quote:.... I just couldn't in my own mind put together a more cost effective package for $1500 when it comes to looking at the planets AND deep sky...
7x35 and 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, 10" f/11 R30 Istar refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957), 4.25" f/14.8 tasco 20te.http://cleardarksky.com/c/OmahaNEkey.html
Quote:Quote:.... I just couldn't in my own mind put together a more cost effective package for $1500 when it comes to looking at the planets AND deep sky... I'll take that challenge and answer it with this: Two 8" F6 primary mirrors from Discovery (1/20th wave or better - Discovery being the sweet spot between quality and cost), 2 curved spiders with secondaries, 2 2" focusers, 2 sonotubes, 2 2" diagonals, and a doublewide dob base. Let the entire sonotube rotate for IPD adjustment or build rotating secondary cages a la killdabudha. Build it yourself of have one of the custom makers build it for you. Advantages: accepts 2" EP's, no 2x corrector needed to reach focus, more light grasp than a 10", higher quality optics than GSO, true low power widefield capable, seperate focus for each eye.... I came to the conclusion a while back that just in terms of cost, it would be better to have twin OTA's on a custom platform at apertures of 12.5" and under. Once you pass 12.5" the cost of that second (premium) mirror is more than the cost of a binoviewer.....Of course you could go with a couple of used 12" GSO dobs at about $450 each, cobble together a double base for them, add a couple of 2" diagonals, and be binoviewing with around 16inches equivalent light grasp at about your $1500 price point...
Quote:... Build it yourself of have one of the custom makers build it for you. .....Of course you could go with a couple of used 12" GSO dobs.......
Quote:Quote:... Build it yourself of have one of the custom makers build it for you. .....Of course you could go with a couple of used 12" GSO dobs....... Let me clarify where I was headed: It would difficult to purchase (not build) a new (not used) set up for $1500 that would surpass, in my opinion, the arrangement that I mentioned above.My problem with DIY is one of time and skill. I'd rather pay to have it done because for me, pretty much everytime I have done DIY projects the same thing happens, I get it done, it costs more than I originally thought in parts, and, it just doesn't work as well as the "store bought" version. This has happened to me with electronic drums, astronomy equipment, and DIY TV antennas (and I still don't stop trying). In the end, I would rather spend the time looking through the telescope rather than building it. (I have three little children at home and I barely have time to use my telescopes, let alone build them.)As for used, that opens up an entirely different discussion, such as, how much is a used 10" GSO dob and used bino's? If one limits the discussion to new, manufactured (not DIY) items, JMI's 6" bino telescope is 3K and doesn't offer the aperture of a single 10" scope. I am also surprised that you know of a custom builder who would agree to put together an 8" bino scope with rotating cages for under $1500 including parts and labor.Having sufficiently defended my original premise, I admire your enthusiasm and agree 1000% that an 8" binoscope would offer a tremendous improvement over a bino'd single 10" scope in light grasp, field of view, and general awesomeness, (although portability and ease of use would be better with the single 10".)I also would LOVE to look through an 8" binoscope, and your buy two GSO dobsonians and join them scenario almost lured me into the DIY morass in the past, but again, I knew I simply didn't have the time to do it justice.Good luck on your project and enjoy!Peter T.