ST80 Objective Lense Cells

[Nortilus]

Hi,
Just had to clean mine and I had a distraction (children) and came back and totally forgot how the 2 lense cells came out. Found this image on a site and i put it back together like this and it seems ok. I get focus with a 25mm EP so I'm guessing ok...can someone confirm this is how the cells go back in please?

[bojan]

This looks like an ordinary doublet (the light comes in from the left side)

[Nortilus]

yeah...it is...so if i used that image as a guide you would say i got it back together ok...

[bojan]

Yep.
However, proof of a pudding.. is the image in the eyepiece.
If this is OK, then no worries.
I am assuming the doublet is air spaced? The distance between elements is also critical, I assume you have the spacer in place as well.

[Nortilus]

Yeah. I put the spacer back in. And i didnt over tighten the locking screw either, just enough to hold them in place firmly. I got focus with an eyepiece and it looked ok.

[bojan]

So, all is good :thumbsup: