Merlin66
30-03-2016, 05:05 PM
I bought this lens last year for the spectroheliograph project.
It's an absolutely great lens BUT my current design really needs a shorter focal length solution.
Ideally I need a doublet achromat around 60-80mm diameter and a focal length of 700-800mm.
A swap would be good or can negotiate a buy....
Let me know if you have something available.
Ken
It's an absolutely great lens BUT my current design really needs a shorter focal length solution.
Ideally I need a doublet achromat around 60-80mm diameter and a focal length of 700-800mm.
A swap would be good or can negotiate a buy....
Let me know if you have something available.
Ken