The instrument is out of alignment (it is under warranty).
I have a pair of Minolta Activa 10X25WP Binoculars that are out of alignment. The binoculars are under warranty. I am trying to find an authorized Minolta Service Center that I can use to have the binocs repaired under the warranty.
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The oculars are not aligned properly causing double vision. Check on the binoculars to see if there is a place to adjust the alignment of either of the oculars. Look for any loose screws that may cause the two oculars to be out of alignment.
If this is not the case try adding some torque to the binoculars to see if the will adjust to where they will both point in the same direction. The eyes can fuse disparate images slightly but there is a very small range that they can handle. If the two images are separated by more than this small amount it will cause eye strain and double vision.
Most compact binoculars have a central bridge. The objective (big lens) end of the binocular hinge usually has a ball bearing in it. The other end may either have a blanking cap or a hub where the neck strap attaches. Removing this cap or hub will reveal a grub screw which tightens another ball bearing against the bridge. Take the appropriate part off the limp side and look for the grub screw. Tightening it will decrease the "limpness". Be careful, as these are sometimes set in place with a locktite of some kind. Best to release pressure first before tightening.
It depends on what exactly is broken. Low temperature silver brazing can fix a fatigue failure of a bracket. You should contact Orion and ask them to quote repair cost. Orion Telescopes & Binoculars
89 Hangar Way
Watsonville, CA 95076 Or take it back to the dealer where it was purchased. If it is still under warranty, take your receipt as well. You may get a new binocular in exchange.
Your question is listed under "Zhumell Oberwerk 45 25x100 Astronomy binoculars". If these are what you have then they're an extremely high end expensive specialist item and will need professional realignment. I'm assuming that if you do own a pair of these then you're knowledgeable enough to have done all you can to adjust them correctly.
I suspect that you have a regular pair of 10x50 or similar binoculars, with a centre focus wheel and hinges. If this is the case then try to wiggle one of the eyepieces back and forth: if you can easily move it and the other eyepiece remains steady then you have a broken hinge. This is a very common fault especially if your binos have been dropped or if they've been stored in their case upside down (i.e.standing on the eyepieces).
A broken hinge is normally a write-off as there is rarely sufficient area to us epoxy glue on and the metal used is not usually suited to being brazed. Even when the hinge can be repaired it's normally permanently misaligned.
Either resign yourself to using one half of your binoculars or buy a new pair. In the UK LIDL regularly sell a pair of Meade 10x50 binos of excellent quality for just over £10 and that's only a little more than a bottle of epoxy resin glue costs. You may be interested to know that one of the world's most successful supernova spotters does so in his back garden in the UK using just half a pair of old 7x50 binos.
This is more common than you would think.. Here's how to set up a pair of binoculars to suit yourself. Any good binocular will be able to do this and the reason is to allow you to adjust them for the difference in strenght between your two eyes. I wear glasses myself and sometimes contact lenses so it's good to be able to quickly adjust them.
1. turn the binoculars over so you are looking at the underside. 2. on the eyepieces can you see on one eye(usually the right eye) a little plus - minus marking. The eyepiece should be able to rotate a little to each side of this marking. 3. Set the rotating eyepiece to the middle setting. 4. Look through the binoculars as normal and bring the two sides together until you form the two circles that you see into one. 5. Pick an object app 10 meters away. 6 Presuming that the adjustable eyepiece is on the right hand side then close your right eye, look at the middle distance object you chose with your left eye and use the central focusing knob/wheel in the middle to bring your left eyepiece into focus. 7. Now, close your left eye and adjust the rotating right hand eyepiece while looking at the same object until your right eyepiece is in focus. 8. The binoculars should now be set for the differences in strenght of your eyes and you can use the middle focus control as normal.
Most binoculars have a soft rubber eyepiece that can be folded back for people who wear glasses but I, like most people I know who wear glasses, find it horribly uncomfortable.
This method allows you to set them for yourself and if someone else uses your binoculars you can quickly reset them for you.
Hope this helps...
- Oh yeah, sorry, forgot to mention.. This set up is so you can use them without wearing your glasses.. Much more comfortable!!
If you haven't contacted Minolta to purchase a replacement set you could try contacting Binoculars.com in the US. They ship international if need be. If Minolta can't help. Measure the circumference of the eyepiece and you could try a different brand of caps. Steiner Binoculars have a number of different caps and I have used their one piece cover on a number of older binoculars I have to protect the eyepiece when I am out and about. I'm in Australia and have used the above company for these parts and they are very helpful.