Originally Posted by Peter Ward
I'll take a wild guess.... 130mm f6.....hmmm about 780mm perhaps?
BTW I have a 1993 version of the same scope... Provided its been looked after you'd be mad let an opportunity like this to slip by
Thanks for the math and comments. I gotta ask.. I haven't received an offer from you as yet, sooo.... does that make you mad as well?
Im not sure if your scope is the same, I did some tests since placing this ad. I read that the NASA glass Christen triplets has a slight yellowish tinge to the objective and sure enough it has a slight tinge of yellow. The previous owner assured me it was NASA glass, but I tend to take such statements with a grain of salt, but the test seems to indicate it is. Your later model, from what I have read of late, was not the nasa glass. Not that that is a bad thing. Its just that the NASA glass ap scopes are a piece of history.
I want to highlight some issues with the scope:
Firstly: some bloke called Roland graffitied and dated on the side of the objective as shown in the photo.
Secondly: There is 2 holes where it looks like somebody has mounted a finder to the tube shown in photo. They came free with the scope! When I originally got the scope it had some bolts in it, I removed them as they were shiny and caused reflections and covered the holes with tape. They can easily be covered with the mounting rings, I didn't as I had dec balance issues.
Thirdly: I think it may have had the tube shortened. I didn't mind as it meant that I could run an imaging train longer that most peoples arm without running out of back focus (and I did! Without focuser sag too). If your into visual then you can run binoviewers easily without barlows etc.
Looking at offers around 5k.