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Having trouble focusing the binoculars

Praktica A25-125x80 Super Zoom Binoculars
Bought these off a guy recently on EBAY, they seem to look ok ( new or near new ) and i've bought a new tripod ( Velbon Sherba 450R ) for them to go on, but i can't get a clear stable image ( out of focus, double image) , Any suggestions from you on how to set them up or what could be wrong would be appreciated.
I also own a pair of Inpro Grossfield 20 x 60 IR Binoculars ( not Zoom ) which i can set up on the tripod with no problems at all.
Thanking you for your time

Steve Dent

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I see double image unless I take the lens as close as the binoculars can go


thats how binoculars are. Yours in this case is really strong. the closer you are to something, looking at it, the more magiflyed you going to be. try view things far a distance, really far away. no more double right?
Everything you need to know to become an expert:
on this website: http://www.chuckhawks.com/binocular_basics.htm
It is surprising how many people do not know how to focus binoculars correctly. There are two common focusing systems used in binoculars.
The first is individual eyepiece focus. This system is simple to understand, and easy to manufacture. It also lends itself well to sealed optical tubes, and thus is usually the focusing system used for waterproof binoculars. Individual eyepiece focus means that to focus the binoculars to your eyes, you simply focus the left eyepiece to your left eye and the right eyepiece to your right eye. There is no centrally located focusing mechanism. It is done like this. Look at something in the distance. Close the right eye (or cover the front of the right binocular), and focus the left eyepiece to your left eye. Close the left eye (or cover the front of the left binocular), and focus the right eyepiece to your right eye. You are finished, until you need to look at something at a different distance, in which case you need to repeat the process.
Because individual eyepiece focus is time-consuming, center focus is more common. Unfortunately, very few people understand how to correctly use center focus binoculars. Here is how it is done. Aim your binoculars at something in the distance. Close the right eye (or cover the front of the right tube), and focus the left side of the binocular to your left eye using the center focus control, which is concentric with the pivot shaft between the binoculars. (Note: the left eyepiece itself does not focus on center focus binoculars.) Next, close your left eye (or cover the front of the left tube), and focus the right eyepiece to your right eye. DO NOT touch the center focus control while you are focusing the right eyepiece to your right eye. Now you are finished. What you have just done is adjust the binoculars for your individual eyes. (Practically everybody's left and right eyes are different.) From now on, you only need to adjust the center focus control when you look at things at different distances. Center focus is faster and easier to use than individual eyepiece focus, once you have initially set the binoculars for your eyes.
Binoculars are commonly described by using a pair of numbers, as in "7x50" or "8x25." The first of these numbers refers to the magnification offered by the binocular. Magnification is why most people buy a pair of binoculars. In the examples above, "7x" means the binocular makes whatever you look at appear seven times closer than it does to the unaided human eye. "8x" means the binocular makes whatever you look at eight times closer than the unaided human eye. "10x" makes things look ten times closer, and so on. The first number used to describe binoculars always refers to their magnification. Common binocular magnifications are 6x, 7x, 8x, 9x, and 10x.
There are also variable power (zoom) binoculars, such as 7-21x50. These almost always perform much better at the low power setting than they do at the higher settings. This is natural, since the front objective cannot enlarge to let in more light as the power is increased, so the view gets dimmer. At 7x, the 50mm front objective provides a 7.1mm exit pupil, but at 21x, the same front objective provides only a 2.38mm exit pupil. Also, the optical quality of a zoom binocular at any given power is inferior to that of a fixed power binocular of that power. In general, zoom binoculars are not the bargain they seem to be.
Remember that everything (including movement) is magnified when you look through a pair of binoculars, especially your own shakes and tremors. So the higher the power, the harder it seems to hold the binoculars steady. 6, 7, or 8 power binoculars are easier for most people, even those with very steady hands, to hold reasonably still. The higher powers sound like a good deal, but often result in jiggly, blurred views. This is why 7x binoculars are chosen by so many experts, including the military.
Power affects brightness. Other things being equal, the higher the power, the dimmer the view. And power also affects the field of view of the binoculars. Again, everything being equal, the higher the power, the smaller the field of view. So, as you can see, power must be balanced against other desirable characteristics when choosing binoculars.

May 09, 2011 | Bushnell 240842 Binocular

2 Answers

I bought the 10x25 camera binoculars and only one lens will focus using the center dial. Its almost like the other one needs to be focused at the eye piece itself. The pictures are not clear and are...


It is common for binoculars to have one independently focusable eyepiece.  If one eyepiece can be rotated, then that is the case.
If that is the case, focus through the one that DOES NOT rotate using the center control until you get a sharp image on that side.  Then rotate the eyepiece on the blurry side until the blurry side is sharp.  If you succeed at this, from henceforth the center control will focus both eyes adequately

Aug 11, 2010 | Sharper Image Binoculars & Monoculars

1 Answer

The zoom lever is not working moves but doesnt change


If the zoom lever is not working then I would recommend buying a new pair without a zooming mechanism. Zoom binoculars are more trouble than they are worth. Sorry!

Feb 20, 2010 | Minolta Classic II Binocular

1 Answer

Value of the model 172 Jason Binoculars


I'm sorry to say this. Not much. Maybe 30 dollars US on a good day on the auction site if the binoculars are in great condition. Zoom binoculars are not known for their quality optics. Jason binoculars have a small collectable quality in a niche market for old Japanese optics. Just to have not for their optics. Non zoom older Jasons are worth a small amount more.

Aug 23, 2009 | Nikon Superior E Binocular

1 Answer

See two images at higher power.


Your binoculars are out of collimation. That means that the optical path needs to be aligned. Binoculars are designed so that the focus point of each barrel is the same over long and as short as possible distances. Binoculars that are properly aligned will still show a double image if you attempt to focus at something close that is too close for the models design. However this is not the same for long distances. The image at a long distance must not be doubled.

If they are under warranty and you haven't damaged them by dropping etc send them for repair to the manufacturer or ask the retailer where to send them.

If you are going to pay to have them fixed get a quote first. Binoculars that are of the zoom variety are not well thought of among binocular officionados as the quality of image degrades at higher magnification. For the price of repair you may be able to source a higher quality non zoom binocular.

Jul 20, 2009 | Sharper Image Spion (AR001)

1 Answer

Case is "sticky" like glue


The same thing happened with my old Praktica Sport Zoom binoculars, and (in my case) found that the sticky coating could be removed by repeated rubbing with paper towels moistened with methylated spirit ("meths"). SAFETY FIRST: If you decide to try this method and have not used meths before, it is a very flammable liquid, and harmful by touch and inhalation, so please wear rubber gloves and do this outdoors or in a well ventilated place and away from sources of heat or fire. That said, it is cheap and readily available from DIY stores, usually in their painting section.

May 09, 2009 | Binoculars & Monoculars

1 Answer

I would like to know where to send my husbands Minolta zoom 19514845 to be repaired. It is called a Minolta zoom stanard zoom, 8x-20x50, 3.1 degrees at 20x. The zoom does not work. You can focus without...


sorry to give you bad news , but most zoom binoculars are not worth cost to repair, they are made of either a small steel band or tiny metal gears to enable both sides to work simultaneously, once they are broken it is almost impossible to find matching parts. sorry....larry@reichinstruments.com

Dec 29, 2008 | Binoculars & Monoculars

1 Answer

Insta-Focus focusing problem


first open and close the binoculars untill they fit you eye width,now adjust left eye with the flat section located on the center hinge,now turn right eyepiece till clear. note: once you have adjusted right eyepiece you only have to leave it in that position in order to focus from near and far.........good luck......larry@reichinstruments.com

Nov 24, 2008 | Bushnell "Insta-Focus" Binoculars

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