Taking a hand in mirror making - seeings mine is undercorrected

[davidpretorius]

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/ngm/images/flashback/2004/large/0401.jpg


(courtesy national geographic)

[33South]

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

[davidpretorius]

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

[h0ughy]

is that a f 1.1??? or f50?

[Miaplacidus]

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

[davidpretorius]

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