"If I say something in the forest and my wife isn't there to hear it, am I still wrong?"
20" homebuilt truss dob 6" watson refractor
Quote: I'm sure Dave will fix that primary!!! Don't think he'd ever let one like that get by......Mark
Quote: primary 400mm dia. r/c 2460mm f/r 3.075secondary 162mm dia r/c unknown at this moment.secondary is 490mm inside primary focusprimary-secondary spacing 740mmsecondary to final focus 1035mmAm I right that this means an amplification factor of 1035 ÷ 490 = 2.112 which makes the final f/r 6.49!!
Quote: I'm wondering what thought process was in the mind of the original maker. I have met him and I believe he does use the startest when figuring. The obvious thing is to give him a call but I'm hesitant to do that as he's very hard to talk to and would likely take offence to any questions.
Mike Lockwood - Owner, Lockwood Custom Optics. 20" F/3 MX Starmaster, 14.5" F/2.55 self-built Newt., nine self-built scopes, 4.25" to 30" http://www.Loptics.com/
If everybody is special, then nobody is special
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.
Quote:The guy did his best with what tools he had at hand.Since he isn't posting or reading the forums here, we have no way of ascertaining the validity of your remarks.Since the specifics of the scope could identify him, doesn't that bother you?Moderator please review or I'm off.Mark