The T2 is an old style instrument with erecting image. I am not sure how to read the micrometer. It's not like the new style T2s I have played with before (and got really good results with). This is the T2 with the screw mechanism open and visible. The plummet is on the tribrach (not as easy to adjust). If the instrument has issues I wouldn't know how to adjust it; I could do the plummet with our adjusting cylinder but the rest of the instrument deserves someone who knows what they are doing.
I think I can get the T1 adjusted and working.
Part of the problem is I don't know what happened to the orange padded plastic cases. I think riding around in the truck with just the bullet case vibrates things out of adjustment.
I learned something pretty quickly.
When doing a sun shot with no solar filter you only get two pointings, no really, when reading the microscope on the T1 you can feel the sun trying to burn a hole through your cheek. I put my clipboard in front of the objective then read the angles.
Need to requisition yourself one of those padded backpack to put the bullet case in.
I've seen a lot of old T1's,including old inverted-image guns, but not one with a split-bubble. Perhaps I am not familiar, or possibly you're thinking of old T-2's. I have used those with split-bubbles.
you'll also fry the lenses coating. At least that's what i was told eons ago when we were doing sun shots....
Dave just turn the mirror a little so the sun doesn't shine directly into the instrument. Part of using the instrument is constantly moving the mirror so you can read the scales properly.
T.W.
I used a T1-A to track a solar eclipse, didn't harm the lens coating at all. It did kill the spiders that make those little cross hairs.:-D