I've got two of those Edmund military eyepieces. If I remember, I'll post pics when I get home tonight. Very nice, especially in a rich-field application or finderscope, as the ad suggests.
Posted 06 August 2014 - 10:08 AM
Acquired this 2" 60mm Masuyama at a excellent price from a Great friend last year.
Weight wise its 1 lb 13.8 oz or 845 Grams and its as tall as a 16 oz beer can, in the second image i removed
the threaded top ring that serves as a eye placement guide, removed to show the size of the eye/field lens. Cans and Pentax 7mm for scale.
This eyepiece is the Flagship of my classics eyepiece collection
Posted 06 August 2014 - 07:59 PM
I lied, I actually have 3 of those Edmund eyepieces. All are in finderscopes. Here is the one in my 10" f/5.6.
The other 2 are not mounted at present.
The eyepiece itself. I polished the brass cell on this one. Need to turn a 2" focuser adapter for it one of these days.
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Posted 06 August 2014 - 08:08 PM
Getting organized in the shop tonight, so I took pics of the bulk of the eyepiece collection, 95% are "classics".
My current oldest eyepiece case, goes back nearly 30 years. Almost everything in there is University Optics, except the filters which are various makers. Colored filters in white boxes, LPR & narrowband filters to their right. Klee Barlow (red cap), with Orion tri-mag below it. Complete set of 1.25" Zebra Konigs, 11mm & 16mm Widescans in 1.25". 32mm Widescan in 2", 40mm 7/70 in 2", Limited Edition 55mm Plossl 2", 2x 2" Barlow, 25mm Konig 2". Also my 1.25" Erfles, 16mm, 20mm, 25mm, 32mm. Couple of flat-top old Orthos as well.
The "Everything Else" case, which I just fitted with a new foam insert today. I had a spare pistol case doing nothing, so now it has a purpose in life. Actually there are more accessories so I guess I need a third case. More diagonals, including the 2" stuff, extension tubes, etc.; they may as well go into a case too. 1.25" on the left, .965" on the right. There are 6 matched pairs in the approximate center, for the bino viewer. Still putting caps on eyepieces at this stage but it looks more impressive with most of the caps off for the photo.
I used closed-cell packaging foam, removing the egg-crate foam rubber insert but leaving the top egg crate in place. The eyepiece holes were drilled on a drill press with a Forstner bit. The foam was cut-down from a larger sheet to fit the case, using the table saw.
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Posted 07 August 2014 - 09:42 AM
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Posted 08 August 2014 - 05:44 AM
I had one of them. Edmund also sold an adapter so you could mount the eyepiece in a standard 1.25" focuser. That eyepiece gave great views with my 6" f8 refl.
Posted 08 August 2014 - 07:56 AM
With the lens specifics right there in the ad, you could probably make a decent-performing clone.
Posted 08 August 2014 - 09:01 AM
Here are my two vintage eyepieces. My one and only Televue EP, and another 31mm Erfle from the 60's. The Erfle is now my finder eyepiece.
Chuck: I had the 1/2" version of that Ramsden eyepiece you showed a few pages back. I bought it in '64 for $3.00 at the Edmund outlet in Chicago (forget the name).
Posted 08 August 2014 - 01:07 PM
I tried posting this in the 'Eyepieces" forum but I guess no one there knows anything about it. A friend of mine gave me a few eyepieces and one of them was this "Owens W15X" made in Japan. The 1.25" barrel was extremely dirty and covered with a "Liquid Nails" like residue. I decided to clean it up a little and try it out.
Jupiter was the target using an older Meade 856 8" f/6 scope. Eye relief was pretty tight. The image was fairly bright with some color fringing but there was some fair detail.
Does anyone here have any information regarding this eyepiece? I'm curious as to who made it and how old it is. Was it sold with a particular brand of telescope?
This is a microscope eyepiece and looks like many Huyghens types I've seen, incl one sold by Edmund Scientific that I bought in about 1979. The 15x indicates that it has a focal length of 250/15 = 16.7mm (not 31mm as another poster typed) since the standard for microscopes is a 250mm FL. So, a typical 10x microscope eyepiece has FL = 25, 20x = 12.5, 30x = 8.3. You don't see too many 15x like this but sometimes you see 8x = 31mm
Posted 08 August 2014 - 03:29 PM
Well...I wiggled it, and jiggled it, and removed it from it's holder. I took some photos and added more accurate dimensions. It certainly seems similar to the Edmund pieces but.. the dimensions are different. IMO this is an excellent finder/wide-field eyepiece.
Any more suggestions as to what this is?
Posted 08 August 2014 - 03:40 PM
It's longer than the Edmund eyepiece I used to have that was the exact one from the old advert in the catalog. Mine didn't have the 4 holes in the side other. Yours is just a bit bigger. Mine was just like Chucks.