Taking a hand in mirror making - seeings mine is undercorrected

davidpretorius · #1 13-01-2006, 11:41 AM

Mark has advised i have a undercorrected mirror, so i have decided to build one from scratch out of beach sand.

Here is my blank i knocked up last night!!!

http://magma.nationalgeographic.com/...large/0401.jpg

(courtesy national geographic)

33South (Chris) · #2 13-01-2006, 11:48 AM

Collimating is going to be a b'stard of a job.

davidpretorius · #3 13-01-2006, 11:54 AM

that is what i have a chinese cheshire from andrews for !!! - made for all sizes it says!!

h0ughy (David) · #4 13-01-2006, 01:07 PM

is that a f 1.1??? or f50?

Miaplacidus (Brian) · #5 13-01-2006, 01:10 PM

Mmmmmmmmmmmmmmm............... Donuts.........................

davidpretorius · #6 13-01-2006, 01:11 PM

regardless, you would need a lift to get to the viewer or it may be a big SCT for rumples new scope!!!