Vintage and Classic Binoculars discussions
Posted 21 October 2009 - 11:12 PM
Posted 21 October 2009 - 11:44 PM
Enjoy your new EWA!
Posted 22 October 2009 - 08:59 AM
is a binocular in which I'd like to put the eye
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.
Posted 22 October 2009 - 11:26 AM
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.
Posted 23 October 2009 - 01:01 AM
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.
Posted 23 October 2009 - 04:34 AM
Posted 23 October 2009 - 10:21 AM
another nice find!
Bensi, presto possederete tutto il binocolo restante pubblicato all'esercito tedesco imperiale in WW1!
un altro ritrovamento piacevole!
Posted 23 October 2009 - 10:36 AM
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?
Posted 23 October 2009 - 03:10 PM
Beautiful specimen and should not be difficult to reconstruct the hood of the eye.
Great purchase and I would rather rare ...
Posted 24 October 2009 - 12:29 AM
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 qualitÃ Ã¨ eccellente sia otticamente che nella costruzione. Non sono sicuro come otterrÃ² faccio un nuovo eyecup (cappuccio)â€¦ che io ha esaminato ottenente una certa abitudine girata prima che ma il costo sia stato molto alto!
Posted 24 October 2009 - 02:35 PM
Posted 24 October 2009 - 02:49 PM
Posted 24 October 2009 - 09:24 PM
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.
Posted 25 October 2009 - 02:06 AM
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.
Posted 26 October 2009 - 11:21 AM
Posted 26 October 2009 - 01:20 PM
Posted 27 October 2009 - 08:18 AM
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.
Posted 27 October 2009 - 09:42 AM
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.