I will eventually need a secondary for the f/4.5 17.5" dob I'm building. But I'm a really tight budget. So I'm thinking of trying something in the DIY category, following some instructions in an old ATM book I have.
The secondary will be a 3.5" made from plate glass.
I was wondering where in the US would be a good place to have it coated.
Clears,
Joe
PS There's a deal available on eBay for $15 (plus another $16 for S/H). It's listed as item # 280475722223
The secondary will be a 3.5" made from plate glass.
I was wondering where in the US would be a good place to have it coated.
Clears,
Joe
PS There's a deal available on eBay for $15 (plus another $16 for S/H). It's listed as item # 280475722223
In lumine tuo videbimus lumen.
8O Home-made 10” Dob / Home-made 4” refractor
EPs: Konig 32mm (1.25") / Zhumell WF 30mm (2") / Nagler 13mm T1 / Orion Sirius Plossls 25 & 10mm / Zhumell Plossl 9 mm / Meade MA 9mm
