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Patrik Iver
sage
Reged: 07/29/03
Posts: 259
Loc: Kaarina, Finland
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Hello, everyone!
I have in front of me my latest toy – a pair of “Russia”-brand “25x60” binoculars.
The recent thread about true aperture holds a lot of data that shows that many binoculars have a true aperture somewhat less than specified, but generally I would expect the actual objective lens size to be at least close to the advertised size. Not in these. The objectives measure to 48 mm, and the flashlight test gives an aperture of perhaps 42:ish mm.
The true magnification? Around 7x, I’d say, based on comparing image size to some of the other binoculars in the house.
The aroma? Such a bad chemical smell that my eyes are literally watering a bit from it, and I soon will have to place them in their bag and put them away somewhere where they can do no harm.
The objective lenses are ruby coated, and they have “Made in Russia” written on the insides of the actual lenses around the circumference. You can actually see parts of the text in the exit pupil. That is when you strain enough to actually see the exit pupil, as also the eyepiece outer lenses are ruby coated so they mostly reflect all light rigth back at you…
BK7 or other low index glass in the prisms, of couse…
Collimation? Nope… Severe vertical miscollimation comes standard.
There is a reticle of some kind in the right EP, but it rotates with the eyepiece.
Body construction appears to be all plastic – so atleast they are lightweight…
Nice touches are the model number “2010” on the prism housings (must be next years model), the buit in compass (works relative well when the needle does not snag on its point) and the very Swarovskiesque eagle/osprey shown on the tethered objective covers!
Obviously they are not Russian, but rather Chinese. Still, shows that Russian optics even today have a good reputation in some parts of the world, as someone decided to mislable them “Made in Russia.
Why on earth anyone would go through the trouble of producing such a horrible piece of trash escapes me, but I guess someone somewhere must make atleast some money out of it…
I googled “25x60 binoculars” and found this link to some pictures of a similar pair: http://www.flickr.com/photos/jarno_suni/sets/72157622642127506/detail/
And why on earth did I end up with a pair?
Here is what happened:
Yesterday I spent some time with my youngest child at the playground by the beach close to our house. Naturally I had a pair of binoculars with me. Coming home, pushing my son in his stroller, I had my (“embarrassingly expensive”, as Ron Harper recently called them in the “100 Her at 8x” -thread) 7x42’s around my neck. My neighbour was out in his yard doing some late autumn gardening, and spotted my binoculars. We chatted for a while, and he said he had a present for me. For a millisecond or two I had an overly optimistic inner vision that he might donate a pristine pair of 40 year old Leitz or similar to me, but he came with the “25x60’s”… He had bought them as a charity gesture from some guy in the street for 10 Euros (some poor souls from the somewhere in the south-east corner of the EU apparently have no other way of making a living than coming here to peddle various cheap goods).
Now the question is what to do with them… They were a present (even if clearly given as a joke), so I can’t really “do the right thing” and just put them out of their misery… And they smell so toxic that I would never risk having children handle them even as a sandbox toy…
Perhaps they could be useful as a discouraging example of what really bad “optics” can be like?
Any other suggestions?
-------------------- Best regards,
Patrik Iver
60°N, 22°E
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Mark9473
Post Laureate
   
Reged: 07/21/05
Posts: 3211
Loc: 51°N 4°E
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I hope you don't mind, but...
-------------------- Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63; Docter 15x60
WO Megrez II 80 FD + Baader 90° T2 Amici
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brentwood
Pooh-Bah
Reged: 11/04/05
Posts: 1109
Loc: BC Canada
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It's as if some of these Chinese companies have NO idea what the numbers on binoculars mean. I have seen those Ruby lensed horrors at flea markets that look to be about 7x35 marked as 90x90! I remember going into a pawn shop in a very bad area of Vancouver. There was quite an array of older but uninteresting binoculars there. The owner came up & asked if I was interested in something with a bit more quality, as he had them hidden away in the back! Just like Patrik above, I thought he'd bring out some Leitz or Zeiss. But no, he looked around and slyly passed me some plastic, ruby lensed horror. I then foolishly told him that ALL of the old binoculars were of a higher quality than these. He then THREW me out and told me not to come back! So now I am unofficially banned from the worst looking pawnshop in Vancouver as well as most of the pawnshops in Idaho (where I told them that Bush-Nell were not the best binoculars ever made)
-------------------- Big telescope.Small telescopes.
Ridiculous binocular collection
I've cut it twice and it's still too short.
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monchito
journeyman
Reged: 06/02/09
Posts: 5
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well i would have liked something like that lol i i already own a good pair or real russian kronos 20x60 which buy the way are decent.. just looking at that red coating spelled cheap binos......
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RichD
professor emeritus
Reged: 11/08/07
Posts: 564
Loc: Derbyshire, UK
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"So now I am unofficially banned from the worst looking pawnshop in Vancouver as well as most of the pawnshops in Idaho (where I told them that Bush-Nell were not the best binoculars ever made) "
-------------------- Clear skies
Rich
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KennyJ
   
Reged: 04/27/03
Posts: 12901
Loc: Lancashire UK
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Patrik ,
Are you sure the prisms are made of GLASS and not plastic ?
I've been studying this topic for a few years and have come to the conclusion that with regard to magnification , certain hidden regions of China must have their own numerical system , based around pi .
Thus , what the rest of the civilised world would regard as being 7x magnification is expressed ( to the nearest whole number ) as ( Standard Magnification x pi ) + pi.
So in this example , we have ( 7 x 3.142 ) + 3.142
This would equate to 21.994 + 3.142 = 25.136x magnification
Just as confusingly , diameters of circles are expressed not in millimetres , but in units known locally as what sounds like the word " chintz " , one chintz being approximately equal to 1.42 millimetres , the constant factor of 1.42 being derived at by moving the decimel point in pi along one place to the right , then dropping the 3 that originally preceded it .
Thus , 42mm becomes 42 x 1.42 = 59.64 chintz
So rather than print 25.136 x 59.64 on the prism housing ( which after all , wouldn't really fit very well without the numbers being very small ) 25 x 60 is used for simplicity .
It is also a considerably more accurate representation of the true specification ( in chintz ) than the data plates show on MOST binoculars made in China , when expressed in standard magnification and millimetre units .
The only exception to this pattern seems to be with 7 x 35mm binoculars .
One can only presume that in that region , the number 35 is considered very unlucky , but only when and if preceded by the number 7 , because when multiplied by 5 , 7 becomes 35 , and multiples of 5x are also considered unlucky ( 5 being exactly half of 10 ).
When two " unlucky " numbers , such as 5 and 35 can be so readily mathematically linked , one way of avoiding any likely curse is to add the two numbers together ( 5 + 35 = 40 ) then multiply it by the ACTUAL TRUE magnification , which in Brent's case in Vancouver , must have been 7.0695x
40 x 7.0695 = 282.78
Now divide 282.75 by pi ( 3.142 ) and we get 90 !
note also the 7.0695x divided by pi
7.0695 divided by 3.142 = 2.25
Now , going back to our 40 ( 35 + 5 ) ------
---- we get 40 x 2.25 = 90
So the 7 x 35 binoculars become 90 x 90 .
It's as simple as that , really !
Kenny
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brentwood
Pooh-Bah
Reged: 11/04/05
Posts: 1109
Loc: BC Canada
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Kenny, thanks for those calculations. I think I'm going to write them down and use them the next time I get into a binocular argument in 'Gus's Gun Emporium & Pawn' in Idaho.
-------------------- Big telescope.Small telescopes.
Ridiculous binocular collection
I've cut it twice and it's still too short.
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RichD
professor emeritus
Reged: 11/08/07
Posts: 564
Loc: Derbyshire, UK
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lol
-------------------- Clear skies
Rich
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Patrik Iver
sage
Reged: 07/29/03
Posts: 259
Loc: Kaarina, Finland
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Quote:
well i would have liked something like that lol i i already own a good pair or real russian kronos 20x60 which buy the way are decent.. just looking at that red coating spelled cheap binos......
I've also got a pair of Kronos 26x70 binoculars which are quite decent except for very short eye relief and a tad deficient stray light control. Made in Russia.
And a pair of Russian "real" 7x50's made during the existence of a country called the Soviet Union (marked "CCCP" or "USSR", can't recall which, and can't check as they are out on extended loan). My first pair of binoculars, actually - must have gotten them about 25 tears ago. Also quite good. High index prisms, very sharp, but with a bit yellowish colour cast to the image. Hard eyecups. Made by the factory that later made the "Kronos" brand, as the logo is identical, and the prism housings also.
-------------------- Best regards,
Patrik Iver
60°N, 22°E
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Patrik Iver
sage
Reged: 07/29/03
Posts: 259
Loc: Kaarina, Finland
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First of all I would like to say that you, Kenny, must be a genious, and also in general highly cultured and knowledgable! That was probably the best and most logical explanation for anything mathematical I've read in ages - it is indeed a priviledge to learn from you, Sir! 
But to business:
You wrote:
Quote:
Are you sure the prisms are made of GLASS and not plastic ?
Yes I am. I unscrewed one objective tube (barrel) in order to remove an objective lens just to check if it was a doublet or perhaps even made of plastic. This exposed the prisms, and they are indeed glass, but with the ruoughest unpolished faces I've ever seen in any optic (or in this particular case "optic").
The objective lenses: Regrettably I was not able to unscrew the retaining ring with the tools at hand. Based on weight I'd guess the lenses are glass, but they do look awfully thin to be a doublet. Must be though, as a singlet would/should be immediately obvious by giving a image even worse than what these now give, wouldn't it?
Looking around in the prism housings, I see no provision for collimation. No possibility to adjust the prisms, just rough plastic prism retaining tabs. And there certainly are no excentric rings at the objectives. On the prisms there is, however, some of that grey glue that Gordon has taught us to appreciate. So either the binoculars are not even intended to be collimated, or then they are "collimated" like Steiner did it in that video on youtube, i.e. push prism until in correct position, measure with laser, lock in place using glue. Somehow I believe the first alternative is more likely in this particular case...
-------------------- Best regards,
Patrik Iver
60°N, 22°E
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Patrik Iver
sage
Reged: 07/29/03
Posts: 259
Loc: Kaarina, Finland
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Quote:
And a pair of Russian "real" 7x50's made during the existence of a country called the Soviet Union (marked "CCCP" or "USSR", can't recall which, and can't check as they are out on extended loan).
Marked with both "USSR" and "CCCP", actually. Googled "Kronos 7x50" and found this picture of a similar pair: http://cdn1.ioffer.com/img/item/946/043/76/gJOmG4ExyJh08Lk.jpg
The Internet is amazing!
-------------------- Best regards,
Patrik Iver
60°N, 22°E
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dave132mm
super member
Reged: 12/28/06
Posts: 126
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This is fantastic. Are these readily available. I do like this new math.
Dave
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