Astronomy educator/Sidewalk astronomer
Owner of Astronomy Delight franchise
18 inch f4.42 Dob on eq platform w ST120 f/5 finder
12 inch Zhumell Dob
8 inch f/6.9 home made Dob with Seevers optics
William Optics red 10th Anniversary 80mm FD
C8 XLT on Vixen GPDX
26lb eyepiece box
Cernan Space Center astronomer
Member of Northwest Suburban Astronomers
Enjoy the sky,
"A craftsman relies on science when knowledge allows it, tradition and experience when it does not, and makes art whenever he can." 14 built scopes from 4.25 to 18" and a 24" in (perpetual) progress. 15 ATM awards. Co-mounted CPC 1100 EdgeHD/TAK FS-102/Orion ED80T on a trash-cart for when I'm feeling lazy. "Simple minds discuss people. Good minds discuss events. Great minds discuss telescopes." http://stardazed.com/
Celestron C8 Registry
"If you want to succeed in the world, you don't have to be much cleverer than other people. You just have to be one day earlier.” -- Leo Szilard
Clear skies, Erik
Visual astronomer since 1978.
Matthias Wirth 16" f/5
Takahashi FS-102 NSV on EM-10
Celestron 1983 C5
Zeiss, TeleVue and Celestron eyepieces
Nikon 18x70 IF-WP Zeiss Victory FL 7x42 Zeiss Victory FL 10x32
Quote:Thanks but I wonder why is there a spring in the light baffle tube? What is that all about?? Wouldn't it interfere with the light path?
Friends call me Duane. Compustar C14, Leo Henzl's Custom C8, 6" Refractor Adv. GT mount, 6" F5 Omni XLT Newt., LXD-75 F4 Imaging SN8, Meade 8" F6 Newtonian, EX Dynamax DX6, RV-6 ETX-90 Astro, Meade 2045 4" SCT, B&L 4000 Vixen/Celestron 80mm F11 JC Penny 60mm AZ/ALT Refractor Binos 25x100
• Celestron Ultima 8, f/10 • Zhumell Z12, f/4.9 • Intes MK-67, f/12 • Celestron C5 Orange Tube, f/10 • WO 80mm Fluorite APO, f/6.9 • Carton 60mm ATM, f/16.7 • a few Plössls, a few Orthos, a few Königs, an Erfle or two, a few SWA, a few UWA, a couple SUWA... • CG-5 ASGT, CG-5, & AT Voyager "It's amazing what you can see if you look... " Yogi Berra
Quote:Can it split doubles?
Darren in Bakersfield
Happy owner of--
A Mag 1, 12.5 inch Porta Ball
A Dual Axis Equatorial Platform
A PST Double Stack
Old German proverb: "We grow too soon old and too late smart."
I'm still waiting for the smart.
Orion 8-inch f/4.9 Newt
Orion Apex 90 Mak
An iOptron MiniTower to put 'em on
And a bunch o' goodies to go with 'em.
Alanoodle's Model Portfolio
Quote:The spring inside the baffle tube serves as a series of baffle rings. (On my Questar, the inside of the baffle tube and the spring are blackened, as well as the outside of the end of the baffle tube.) It works very well. Pointing the scope directly at a light bulb and looking through the baffle tube from the back, there are no stray reflections.
Quote:and inside the Brandon eyepiece....
Quote:That tube below the eyepiece is the finder with the lenses built which is reflecting at 90 degrees from a small mirror below it.
Quote:The spring is there obviously to eliminate mirror shift but its dual use as a baffle is ingenious. Celestron and Meade could pick up this trick.
--------------------- --------------------- "Nothing exists but atoms and empty space. Everything else is opinion." Titus Lucretius Carus 99-55 B.C.