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Vintage and Classic Binoculars discussions

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#51 harbinjer

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Posted 21 October 2009 - 11:12 PM

And another view. The objective lenses have a nice purple coating, but I think its a single coating, like the "Fully coated" marking suggests. The eyepieces seem to have an amber coating.
 

#52 harbinjer

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Posted 21 October 2009 - 11:14 PM

Here it is

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#53 pcad

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Posted 21 October 2009 - 11:44 PM

Looks like it has huge eye lenses too. As the wolf said to red, "the better to see you with..".

Enjoy your new EWA!
 

#54 Bensi

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Posted 22 October 2009 - 08:59 AM

Truly beautiful and spectacular.
is a binocular in which I'd like to put the eye

Compliments
 

#55 Erik D

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Posted 22 October 2009 - 09:44 AM

I just got a Swift Admiral Mk1 10x50. It has huge prisms. Like something to fit Klingon hands. I don't think it has quite the advertised FOV, however.


I can't see the FOV figures from your photo. Does it say 420 ft/1000 yds?

From the eye piece end I see a kinship with the Celectron Nova 10X50 listed on Fan Tao's web page: http://fantao.home.a.../cnov10x50f.jpg

Link to Fan Tao article: http://fantao.home.att.net/celnova.htm


I have a Celestron Nova in 7X50 from 1985. I recall at the time Swift had a model of nearly identical appearance and the same 10 deg FOV. I placed an order with a Swift dealer. It was back ordered for months. Called Astronomics and they had the Celestron Nova in stock. Still has that pair today. Excellent mechanical construction but severe edge distortion.

ERik D
 

#56 harbinjer

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Posted 22 October 2009 - 11:26 AM

It says 420ft. I think that I could see from Vega to Sheliak, but not any more. I haven't looked up yet what that separation is.
This is probably not multi-coated, and definitely BK-7. Also I measured it's effective aperture(via Glenn's test), which came up 47-48mm.
 

#57 Bensi

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Posted 23 October 2009 - 01:01 AM

Here's the near final version of my refurbishing of E.KRAUSS 6x25 of 1WW with graticule (sx eye).
After arriving home I noticed that,
while looking pretty good, the hood of the eyepieces were mounted an incline.
I had to dismount with great difficulty as they had bonded with adhesive to attach them and even better had the wire wrapped around the cotton thread.

I even disassembled, cleaned well and collimate front lenses .

Now it is a pleasure to look inside.

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#58 Robert A.

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Posted 23 October 2009 - 04:34 AM

A courageous task! It is interesting to hear your ability to overcome some serious problems! Thanks for writing!
 

#59 potts34

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Posted 23 October 2009 - 10:21 AM

Bensi, soon you will own all the remaining binoculars issued to the Imperial German army in WW1 !

another nice find!

Bensi, presto possederete tutto il binocolo restante pubblicato all'esercito tedesco imperiale in WW1!
un altro ritrovamento piacevole!
 

#60 potts34

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Posted 23 October 2009 - 10:36 AM

OK! latest find a pair of Hunsicker & Alexis of Paris from WW1, they have the M.G markings as well as another G below this and the double broad arrows on the bottom plates.
These were very dirty and out of collimation mainly due to an objective being slightly cross threaded, this was easily sorted with no damage fortunately.
They are a bit tatty cosmetically and there is some light dust inside mainly from the usual French plaster of paris that secures the very large prisms.
The view through them is extremely good, well up to a Zeiss of the day and to be honest until decent coatings became available.
The image has a VERY good 3 dimensional effect with no 'pincushioning' at all and quite a decent fov.

There is a reticle in the right hand ocular, also they have I believe the original strap, cloth/leathertte covering is coming loose but should glue back down.

I really like these though I need an eyepiece or failing that a pair from a Zeiss Silvarem c1914 as the thread is the same measuring approximately 23mm in diameter.
Does anyone know how the oculars split on this model?

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#61 potts34

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Posted 23 October 2009 - 10:37 AM

another pic,

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#62 potts34

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Posted 23 October 2009 - 10:38 AM

and another,

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#63 potts34

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Posted 23 October 2009 - 10:40 AM

and another picture,

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#64 potts34

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Posted 23 October 2009 - 10:41 AM

and last one for now,

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#65 Bensi

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Posted 23 October 2009 - 03:10 PM

From the symbolism that you see engraved on the binoculars, was included in the English army 1WW.

Beautiful specimen and should not be difficult to reconstruct the hood of the eye.

Congratulations!
Great purchase and I would rather rare ...
 

#66 potts34

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Posted 24 October 2009 - 12:29 AM

thanks Bensi,
I think rare also, I have never seen any more from this maker.
Quality is excellent both optically and in construction.
I am not sure how I will get/ make a new eyecup (hood)...I
looked at getting some custom turned before but the cost was very high!

ringraziamenti Bensi, Penso raro inoltre, io mai non ho veduto altro da questo creatore. La qualità è eccellente sia otticamente che nella costruzione. Non sono sicuro come otterrò faccio un nuovo eyecup (cappuccio)… che io ha esaminato ottenente una certa abitudine girata prima che ma il costo sia stato molto alto!
 

#67 Simon S

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Posted 24 October 2009 - 02:35 PM

Thanks to a tip off from potts, I now own a pair of Busch Ultralux 6x24's. They arrived in a fairly clean condition, suggesting they had received a service in the last few decades. The view has respectable with good sharpness although contrast was very dull. I decided to remove the prisms and clean a fine haze from them spending the next hour trying to secure the prism clips in there correct positions. The end result is a surprising improvement considering when I first looked through them the wrong way they looked clean and clear. A bright sharp little binocular with very short eye relief, well made.

Posted Image
 

#68 potts34

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Posted 24 October 2009 - 02:49 PM

My pair were pretty much the same as your Simon with light dust inside that once cleaned brightened up the image far more then I thought it should, also the clips on one side of my pair needed the two 'tangs' spreading to re secure them back into place.
 

#69 GlennLeDrew

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Posted 24 October 2009 - 09:24 PM

Harbinjer,
Those Swift Admiral MkI 10X50's do indeed have many features in common with the Celestron Nova. If similar to the Nova, the prisms are not what one would call 'huge', but rather 'large.' The Nova's prism aperture is 24.5mm, which is certainly larger than the now much more common 21-22mm. But this is dwarfed by the 27mm apertures found in such beasties as the Tasco Model 124 7X50 (needed because of the 29mm eyepiece field stop diameter.) Even so, 24.5mm is perfectly adequate because the eyepiece field stop is just about exactly equal, and hence edge-of-field vignetting will be well under control (discounting any inherent limitations imposed by the eyepiece design itself.)

I'll take this opportunity to remind all and sundry that prism aperture by itself has *absolutely* nothing to do with illumination in the (more important) central parts of the field. (Recall my first post here on CN, 'Prism aperture - the myth', or some similar title.) The prism aperture's primary determinant is eyepiece field stop diameter, where a too-small prism aperture will result in image darkening toward the field edge; it will *NOT* cause on-axis dimming.
 

#70 Bensi

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Posted 25 October 2009 - 02:06 AM

Very small and lightweight binocular that impresses for its quality but also for the extreme compactness.

It is half the size of 6x30 binoculars classical(in photo Goerz Marine Trieder 1914) era but do not remove the neck even after hours of use.

I show You in honor of Goerz company who built it in 1905 but my bino is made in 1912, the serial number 241370.

Bye

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#71 Bensi

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Posted 26 October 2009 - 11:21 AM

One shoot between eyepiece with phone photo camera.

Pagor 8x15 Goerz 1912

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#72 FrankL

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Posted 26 October 2009 - 01:20 PM

Recently, I acquired a Ross Stepsun 12X50 serial #18961 with coated optics and the older Ross trademark. I estimate manufacture in the mid-1950's. Although there was some minor surface wear, the optics upon careful examination were absolutely pristine - no scratches, rub marks, haze, fungus or internal debris. Optical performance was also superb except for a stray light problem which many Ross Porro II's seem to have. I haven't been able to evaluate it against my Leitz Mardocit 12X60, but this should be an interesting exercise. Anyway, yesterday while removing it from the case, I dropped it on the floor knocking it hard on the right eyepiece. Thankfully, no permanent damage occurred, but some small debris particles became evident on the right prism. Although I love to open up, examine and repair binoculars, this one showed no signs of ever having been opened and I didn't want to be the first to do it, but those particles were driving me mad so this morning I removed the ocular assembly and prism plate and blew them out. The operation was a complete success - no scratches, no marred screws, no smudged glass and clean optics again. But ... after removing the prism plate, I was surprised to discover that my Porro II was not really a Porro II! On other Porro II's (Stepmur 10X50, Steplux 7X50, BinoPrism 7X50)the two prisms are cemented together (which, I understand is the defining characteristic of a Porro II) and the ocular field lens is cemented to the prism cluster. I have read that in later production Ross discontinued cementing the field lens to the prism assembly because the introduction of coated optics made this unnecessary. So although I was not surprised to discover no field lens cemented to the prisms, I was surprised to discover that the two prisms were not cemented together either. They were held in place by the usual prism clamp, and there was a 1 - 2 mm space between the prism faces thereby creating two air glass surfaces which would reflect light. Technically, I believe this design is not a Porro II configuration. I still love the binoculars and although I'm a little disappointed to see Ross resorting to this sort of cost-saving measure, I'm not surprised having found numerous other sorts of cost-savings on Ross post-war binoculars. My knowledge of Ross binoculars has increased and the Ross brand still holds a lot of interest for me.
 

#73 Simon S

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Posted 26 October 2009 - 02:27 PM

As found also in the Stepmur

Air spaced porro 2
 

#74 harbinjer

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Posted 27 October 2009 - 08:18 AM

Glenn,
Thanks for the comments. Is there anyway to measure the prism without taking it apart? I don't have a lot of basis for comparison, as I've never seen the Tasco 124. The Admirals just felt much bigger in my hands than other hand held binos.
 

#75 Robert A.

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Posted 27 October 2009 - 09:42 AM

Frank, How is that Leitz Mardocit 12X60? I see them for sale 3, maybe 4 times a year. Does it work just fine? Is it almost to the level of modern binoculars?
Thanks for some details on this old binoculars--!

I wonder how it fits next to the Apogee unibody 12x60, or the russian 12x50 bagish. It couldn't be up to par with a nikon Action Extreme 12x50.

Sincerely,
Rob.
 


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