Preston Lift your eyes and look to the heavens: Who created all these? He who brings out the starry host one by one, and calls them each by name. Because of His great power and mighty strength, not one of them is missing. Isaiah 40:26 Stellarvue SV115T & SV70ED Vintage: Asahi-Pentax, Celestron, Criterion, Edmund Scientific, Tasco, Unitron My Telescope Gallery
Prinz Optics 660 - 76.2x1250mm refractor Tasco 10K - 80x1200mm refractor JC Penney - 50x600mm refractor Astral 500 - 60x910mm refractor Prinz Astral 400 - 60x700mm Refractor Tasco 4VTE - 40mm refractor plus many more I cant remember the details for at the moment
DON'T PANIC!-Hitchhiker's Guide to the Galaxy Don Wyman
Cactus Patch Observatory / 14" LX200
"The four points of the compass be logic, knowledge, wisdom, and the unknown. Some do bow in that final direction. Others advance upon it. To bow before the one is to lose sight of the three."
4.5" f/10 A Jaegers Homebuilt Refractor,12"GSO f/5.3"Reflector,10"Meade LX-50 SCT, 8" Hardin f/6 reflector Yulin 5"f/9 refractor, 4.5"TASCOS Luminova,11TE-5 & 11TR Lunagrosso reflectors,Cel.100mm Reflector.3" Tasco 3TER 700mm 76mm reflector, Tasco 10TE 76mm 1200mm f/l Refractor 60mm TASCO 7TE-5 1000mm f/16.7 Refractor 60mm TASCO 9TE 700mm f/l refractor 60mm TASCO 9TE-0 710mm f/l Refractor www.vega-sky-center.com
Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schiefspiegler,60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4" f/12, 4.5" f/16 & 6" f/12 Schupmann Medial refractors, 4" Celestar, 19 Stellafane awards 9 in optics Engineering = Taking what you have and making what you need.
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:Now, how safe are the solar filters criterion sold that looked like barlow's? I've seen on of them on here a while ago.Also how do you use a hershel wedge on a newt?
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
4" f/5 refractor, 6" f/8 newtonian, Vixen 80mm f/11.4 refractor, C8 (orange), homemade 8" f/4.5 dob, 12" skywathcer autotracking with goto handset, EQ-6 mount Film cameras Nikons FM2, F-801, F4, Practika VLC3, Rolleicord IV,Celestron 5.5" & 8" schmidt cameras. Digital cameras Olympus E-401, Nikon coolpix 4500
ALL my posts should be considered as opinions shaped by MY experiences and understanding of the facts.
Quote:Dave - given that offset from the focal plane - what would be the max-size aperture that could be safely used with the Criterion S-4 barlow-filter - and for how long? Since it would be positioned in front of the diagonal on a refractor, I assume a hershel wedge would not be used here?
Ex Oriente, astrum ---------------------- From the day you are born 'til you ride in a hearse, There's nothing so bad that it couldn't be worse!
8" Criterion Dynamax 6" Homebuilt F/10 Newt 6" F/8 Jaegers 127mm F/5.5 SS Assembly Various 60 mm scopes in many states of repair 8' Dome Observitory
Quote: If you want the best in white light solar observing, you build an instrument designed exactly for it. Here is a picture of my 4.25" f/10 Solar Newt, which uses uncoated optics and a built in Herschel Wedge. - Dave
Avid reader, urban stargazer, & cigar aficionado
Quote: The little Sun filter was designed for use with a 60mm objective (or smaller) and you overloaded it with the light from a 100mm objective!Seriously ,it was subjected to 2/3rds more heat ;there really is a lot of energy in sunlight.
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:I used one of my vintage sun filters this past evening close to sunset with a 20mm Huygens eye piece in my 60mm Celestron/Vixen Cometron 910mm focal length. Nice view, green, did not view for long.
Quote:Not the first time I have pushed things too far! I'm going to set up the 60mm again today and run some further tests with additional sun filters I have.I will report back the results.
I want to do more then just look.
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
I would like to hear more about the design of the telescope you built for white-light solar obsevring, with all the built-in safety features. Can you show us pictures with lots of close ups of the features along with a detailed description? I might want to build one. Perhaps this is already documented and in that case can you just point us to that?
Quote:Hi Dave,I would like to hear more about the design of the telescope you built for white-light solar obsevering, with all the built-in safety features. Can you show us pictures with lots of close ups of the features along with a detailed description? I might want to build one. Perhaps this is already documented and in that case can you just point us to that?Thanks,jon