I am new here. Someone in a different board mentioned this place as the one I should go to for help.
A day before yesterday I picked up a nice early telescope in an antique shop. It is well used, very nice condition for t's age, marked "Dolland London" in cursiv leters. The only problem with it is a missing (broken?) front element of the achromatic lens. The second element is there, ratling in the holder. I took it off and held a slightly bigger acromat from another telescope on it's place -- was able to get a picture right away, so I'm positive that's the only problem, as far as optics go.
So, the question is, how do I go about fixing this? Are there good places that sel 1 5/8" (~40-41mm) replacement acromatic 2 element lensed for such telescope? Someone mentioned www.surplusshed.com. They have some 40mm acromats, but what focal length shoul I pick? The highest they go is 465mm. Specs of the telescope are:
36-3/4" fully extended, w/o shade;
41" with shade.
The barrel is 2-1/2" at the thickest place.
Focal length is 927-930mm, measured from front to rear element in a fully extended state.
I would also like very much to learn more about the telescope. I searched the internet and found several similar telescopes made by Dolland, but they all looked newer, with the letters stamped, not etched cursive. Which Dolland is it (I understand, there were several) and what's the approximate date?
Sorry for so many questions -- I'm new to this. I''ve been collecting clocks for years, but was secretly allways interested in antique optics. The samples I saw before were way too expensive. This one was an odd ball for the antique dealer, so he gave it to me for $150. Could not pass that up.
I'm posting some pictures of the telescope. I put some shrinkwrap on one end to prevent the weaved cloth covering from deteriorating -- it is loose there.
Anyway, any help on this will be highly appreciated.