5" F/9 1st-gen "blue" AP StarFire on Dobbins GEM Mount 6" F/15 J.W.Fecker Refractor on - I'm not sure yet 5" Classic Orange C-5 - with lots of old stuff 10" Meade DS-10 - w/LEATHER end caps 12" LightBridge - extensively moded Jason 60mm Discoverer Model 313 Meade ETX-90EC with Autostar Way too many other 60 mm's Fujinon 6x30 FMTR-SX bino 8' Exploradome with Bay 1st Gen Smoothies - All 5
Quote:OK. I won't. I promise.
Quote:In case its of interest, I videoed the "testing" of one of these filters earlier this year; I put the result on YouTube:http://www.youtube.com/watch?v=G5xb3b-vRd4
What some may view as an argument I view as a different perspective.
Orange Tube C8, Tasco 7te-5, 4" Criterion Dynascope, Jason/Towa 313
Nikon Action Extreme & Pentax WPii Binoculars
At my club, everything one could want up to 18"
Quote:Now to play devils advocate: the solar filter instructions I have seen state they are not for use with an objective over 60mm
Quote:The above test is with a much larger objective lens I believe.
Quote:There's one more safe use. I just held a vintage eyepiece solar filter up to my eye (no telescope) to see the Venus transit - works like a charm! Perhaps they'd fine ... on the objective end of a telescope !
I want to do more then just look.
Old brass and old glass
Gregg 10" f8 Newtonian 12.5" F 4.5 Cave Astrola Unitron 114 w unihex , Unitron 128, Tasco 7te, Tasco 7te-5,Criterion 4000
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:With so many safe and inexpensive Glass and Mylar Solar filters available today why take ANY chance with these on your eyesight? The BAADER AstroSolar film is my personal favorite.
Quote:If you want to observe Sunspots and have no "Safe" filter available, then eyepiece projection (solar image projected onto a white paper) is really the only safe alternative..
I ache, therefore I am
Quote:Personally I would not risk my eye sight with such things and would strongly encourage you all to do the same.Clear skies, not blind eyes!