I have a Weaver T-36 that is several years old. It recently started "losing" zero and has to be adjusted to maintain zero. I've tried turning vert and horiz all the way down and returning to preset point. It lasts a couple of shots then goes high left perpaps 1" high and 3/4" left. No one seems to have solution short of swapping. Thanks, Mike
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this is the grease that has gone sticky what ever you do do not try to take them apart. i expect that the focus ring is the biggest problem or do you mean the width of the lenses to the width of your eyes, or is it the adjustable ring on the right eye adjuster or all of these things get back to me and i will see if i can help
Step 1. Adjust the eyepiece or both if both are adjustable back to zero. It should be printed on there. If it's not, then halfway. To find halfway turn them to one end, count the number of turns like 1 and a half turns for example, and then half that atnd turn it that ammount. You've now reset the binoculars to zero.
Step 2. Now to focus. Pick your target that you want to look at thoguh your binoculars. Look through the binoculars and close the eye with the adjustable eyepiece or your right eye if both are eadjustable and focus the image on the left eye with the central focus knob. Once you've got it focused close the left eye, open the right eye and if it's not in focus adjust the EYEPIECE focus, not the central one, until it's in focus. If you can't get it in focus because the eyepiece focus won't turn far enough in one direction, turn the OTHER eyepiece in the opposite direction at max, start the process again from step 2.
If it's all ok now you need to adjust the distance between the eyepieces. Open the binoculars as far as they go, look through the binoculars with both eyes on the target and move the binoculars inward slowly until you remove any black edges around the image, then move them very slowly inward until you see only one image.
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!!
I would be inclined to use a penatrative aerosol lubricant (like WD-40) in very sparse quantities. Squirt a little in using the WD40 smart straw applicator to direct the lube accurately and work the adjuster back and forth in a small section. Repeat this until you have freed up the adjustment from one end of its scope to the other. The focal adjustment is typically housed separately to the lenses and careful application of the lube should not affect them - avoid overusing the lube and have a mopup cloth under the spray zone to keep overspray/drips to an absolute minimum.
Bushnells are inexpensive binoculars. A repair would cost more than a new one. If they are out of alignment to have them collimated would take time and that translates to expense. Its not something that can be done at home without a collimator. New ones similar to yours can be found online for between twenty to forty US dollars. Binoculars today can be bought much cheaper than a few years ago. If you are happy with the use you have had from your Bushnells an update won't break the bank.