OK, here we go:
DN04 for your finderscope objective lens
DN02 for your 1.25" eyepieces
DN03 for your 2" eyepieces
As I said, I cannot imagine using a band heater for the secondary. Best is a heater that is attached to the back of the mirror. Check out:
http://www.kendrickastro.com/astro/newtonian.htmlThose split ones look useful?
Read this thread?
http://www.cloudynights.com/ubbthrea...2/Main/3809289