asimov
09-09-2005, 04:41 PM
I was visiting the neighbours 2 nights ago, when he dragged some lens out for me to have a look at. He's had em' for years, & would not have a clue what their for.
Naturally I borrowed them off him to see if they would work in a telescope or not. One (not pictured) gives a weird view if U stick your eye to it...I reckon it's a panoramic lens for a camera or something.
The other one (in the pic) it says on the box 'projector lens' meaning just that I spose..a lens for an old over-head projector. On it is written: 'Kowa' super-prominar 16 1 : 1.3/50 made in japan. Obviously 50mm FL. The eyelens dia: 38mm. Looks like a big telescope EP...got a field stop in it as well.
The other night I tried it in the 12.5" newt. The barrel dia. is 43mm so it wouldn't fit in the focuser in anyway. I took the 1.25" adapter out of the 2" focuser & just held it up to the focuser While I had the scope pointed at the lagoon nebula.
The result was: I had to move back from the focuser a good 4 inches to get it to focus. The view was pretty damn good! Lovely wide field! I'm gonna see if he wants to sell it or something! If he does, I can get the engineering place to spin up an adapter on the lathe..:D
Naturally I borrowed them off him to see if they would work in a telescope or not. One (not pictured) gives a weird view if U stick your eye to it...I reckon it's a panoramic lens for a camera or something.
The other one (in the pic) it says on the box 'projector lens' meaning just that I spose..a lens for an old over-head projector. On it is written: 'Kowa' super-prominar 16 1 : 1.3/50 made in japan. Obviously 50mm FL. The eyelens dia: 38mm. Looks like a big telescope EP...got a field stop in it as well.
The other night I tried it in the 12.5" newt. The barrel dia. is 43mm so it wouldn't fit in the focuser in anyway. I took the 1.25" adapter out of the 2" focuser & just held it up to the focuser While I had the scope pointed at the lagoon nebula.
The result was: I had to move back from the focuser a good 4 inches to get it to focus. The view was pretty damn good! Lovely wide field! I'm gonna see if he wants to sell it or something! If he does, I can get the engineering place to spin up an adapter on the lathe..:D