Friends. In aquiring a 5" refractor, two barlows(minus the optics) are used to extend the focus far enough back that the eyepieces will focus. This arrangement is too wobbly. Can you help with a dealer who sells a solid extension tube, if that is even what it is called? Thanks.
Extension tube needed
Started by khking, 04/10/2003 03:02PM
Posted 04/10/2003 03:02PM
Opening Post
Posted 04/10/2003 03:20PM
#1
Not sure how long you need it to be, but Moonlight has a 1.5" extension tube at http://www.focuser.com/cgi-bin/dstore.cgi?category=Focuser+Accessories
Anacortes has a TeleVue 2" extension tube with brass compression ring at http://www.buytelescopes.com/product.asp?t=&pid=4305&m=3
and 3" ones at http://www.buytelescopes.com/product.asp?t=&pid=1139&m=3
and http://www.buytelescopes.com/product.asp?t=&pid=4306&m=3
Hope this helps!
Doug
Midway, FL
Anacortes has a TeleVue 2" extension tube with brass compression ring at http://www.buytelescopes.com/product.asp?t=&pid=4305&m=3
and 3" ones at http://www.buytelescopes.com/product.asp?t=&pid=1139&m=3
and http://www.buytelescopes.com/product.asp?t=&pid=4306&m=3
Hope this helps!
Doug
Midway, FL
Posted 04/10/2003 09:25PM
#2
Kurt, Contact Ken's Rings & Telescope Accessories at their link on Astromart. Ken might be able to fabricate you something long enough & solid. If you contact him, tell him I made the recommendation.:-) He's a friend of mine. DR
Darian R.
Posted 04/11/2003 02:08AM
#3
Orion Telescopes sells them in 1.25 and 2.0 sizes, 2.5 to 3 inches in extension length. Last item under accessories I believe.
Walt
Walt
Posted 04/11/2003 03:36AM
#4
Thanks for all the help & sites. I checked Orion first thing but maybe I missed the tubes. I don't know the manufacture of this all black 5" refractor. It uses the 2 barlow tubes + a diagonal. Did I mention this lens is perfect when tested under collimation. With the extension tube + one of the violet filters ,this will be a nice scope.
Thanks again all.
Thanks again all.
Funding Member
