Quote:The wire is crossed in to dimensions. Will this be strong enough to keep if vibrating?
Quote:About which I'd have to ask, how often will you need to rotate the secondary and how far? Best, Mark
Refractors Reflectors Two Cats A few eyepieces
Quote: I've been looking a lot on your design, but in the end I was to nervous about the initial setup in your design.
Jeff Morgan - Wile E. Coyote School of Telescope Making
Working on a 12" f4.25 single pole hybrid dob.
Quote:...Secondary holder:As the renderings shows I use a hinge and therefore only the angel can be adjusted, no tilt/3 axes as we normally see. I can’t fully figure out if it is enough with that together with the rotation of the secondary. Any thoughts?...
Celestron 8SE Dobstuff 13.1": Swayze refigured Coulter mirror, 6 pt mirror cell (2 pt edge support) and CF focuser board made by me StarBlast 4.5 ST80/PortaMount II Zhumell 20x80/Oberwerk 15x70 on a Seronik-style tripod boom mount Hubble Optics 18 inch F/4 mirror.
Quote:Yes. You only need to be able to make the last few tiny tweaks with the adjustments on the spider, the rest is taken out during installation with a jig.Best,Mark
Quote:Is it *really* worth the effort to go with wire? Does a thinner material truly amount to a change in diffraction intensity of any note?
Quote:Has anyone made a text rig having differing obstructor widths?
Equatorial Newtonians, 20" and 14" "The purpose of life is to be defeated by ever greater things." - Rielke
Quote:Has anyone tried making a spider out of thin, tape-like material, for example videotape?...
Quote:Personally, I agree with the previous post that questioned whether it is really worth all the effort to build an ultra-thin spider.
Ed Jones ........... The best data is an interferogram, the best analysis is from an honest optician.
Quote: ... Exotic materials are not required, though I did experiment with Vectran yarn (too fluffy, like all polyamarids).
Quote:I believe the wires will probably not be line up on top of each other and thus will double their small diffraction.