Short Focal Ratio Dobs - Page 3

November 14th 03, 01:39 AM

Chuck

external usenet poster

Posts: n/a

Short Focal Ratio Dobs

Hi, what's the shortest focal length Dob that's practical? As the aperture
gets larger (greater than 20") what is the downside of making an F3 dob
rather than an F4.5 (more common). Thanks ...

Report this post as spam, offensive or inappropriate

« Previous Thread | Next Thread »

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts vB code is On Smilies are On [IMG] code is On HTML code is Off

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Hans Moravec's Original Rotovator Paper	James Bowery	Policy	0	July 6th 04 07:45 AM
Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS	[email protected] \(formerly\)	Astronomy Misc	273	December 28th 03 10:42 PM
Focal Ratio not important if you don't do astrophotography?	Excalibur	Amateur Astronomy	6	September 12th 03 01:54 AM
Focal Reducers, how do they work?	Stephen Paul	Amateur Astronomy	3	August 15th 03 10:57 AM
Newbie Eyepieces 101	BenignVanilla	Amateur Astronomy	14	July 21st 03 03:50 PM

All times are GMT +1. The time now is 01:32 AM.