Image of the day

Captured by
Byron Davies

Sh2-86 (NGC-6820)

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Diagonal size

Started by fblue, 02/13/2005 01:14AM
Post Reply
Posted 02/13/2005 01:14AM Opening Post
Floyd Blue
View public profile Send a private message to Floyd Blue Find more posts by Floyd Blue Find threads started by Floyd Blue
Forum Member
fblue's avatar

Join Date: Mar 2003

Location: Bakersfield CA, US

Posts: 4913

If you were going to make a 10" f/6 planetary scope, what size secondary would you use?
Quote
[SIZE="Large"][/SIZE][COLOR="Blue"][/COLOR] Floyd Blue grin
Amateur Imager
Posted 02/13/2005 02:19AM | Edited 02/13/2005 02:19AM #1
Ed York
View public profile Send a private message to Ed York Find more posts by Ed York Find threads started by Ed York
Forum Member

Join Date: Feb 2004

Location: Houston TX, US

Posts: 211

If you are really focused on planets, 1.52".

If you want both planets and DSO, 1.83" (a little more field in the 100%) and it still only has 18% obstruction.

Newt seems to say you can get away with 1.34" but your 100% is tiny.

Of course you will get 1/24 pv or better quartz Antares to go with that beautiful primary.

Ed
Quote
Post Reply

Funding Member

Sponsors


View all sponsors

Search