How to fix binoculars with double vision

Although binoculars often seem to have a sturdy body, you will be surprised to know that they are quite delicate. Wondering why?

Beneath the robust exterior of every binocular hide glass made components like prisms, lenses, and eye reliefs. These are very likely to move out of position, gain scratches, or form cracks, causing immense hindrances to the wearer’s vision.

If you have a pair of binoculars for pursuing a hobby or work activity, you will probably suffer from a common issue known as double vision. When this occurs, the user will see differing images through each of the binocular lenses.

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Today we will teach you how to fix binoculars with double vision. Stick around as, by the end of this straightforward procedure, your binoculars will be as good as new!

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Fixing Binoculars with Double Vision

Things You Will Need –

  • Small screwdrivers
  • Tape
  • Tripod
  • Tripod adapter
  • A piece of cardboard
  • Marker
  • Ruler
  • Tape

Process –

Step One: Finding the Adjustment Screws

To initiate the process, users will have to find out all four of the adjustment screws – the two horizontal ones and the two vertical ones. This might be tough since most manufacturers try to conceal them under several layers, to prevent users from collimating on their own.

If you are unable to find the screws despite looking, take a peek at your binocular’s manual or a blueprint supplied by the manufacturer.

Step Two: Getting the Target and Tripod Ready

With your marker, draw a plus sign on the piece of cardboard. Make sure that the cardboard is cut into a perfect square and while drawing, keep the length of both the lines equal. Once this is done, you will have a target to look at.

After moving a few hundred feet from the target, place a tripod on a certain point and place your binoculars on it. Make sure the equipment is properly leveled and that it is looking straight onto the target ahead. You can do this by taping a laser pointer to the tripod and turning on the beam to have it dotted on the target. Your tripod will require adjustments until the beam is aimed perfectly towards the center.

Step Three: Discovering the Faulty Lens

Once your tripod is adjusted, look through the lenses of the attached binoculars one by one. While one will show the right image of your target, the other will probably portray a tilted version.

After identifying the faulty lens, analyze the image to get a further idea of how you will need to fix it. Look at the image and identify which side is away from its original position. If it is the arm that is left or right to the center, then you will have to adjust the lens horizontally. On the other hand, the lens will need to be fixed vertically if the arms on the top or bottom of the center require adjustments. 

Step Four: Making Adjustments

For correcting your lens’ collimation, you will now need to adjust the screws using a screwdriver. As you have identified the lens that needs adjustment, only uncover the adjustment screws present on that side. Depending on your observation, using the screwdriver, adjust the vertical or horizontal adjustment screw.

While you do this, it is important that you work in a calm and patient manner. Being gentle is the key since the screws are connected to the prism walls which are made of glass. Causing even the smallest crack will ruin your binoculars permanently.

You also need to be careful about making the adjustments extremely slowly. After every little turn, look through the lens to see what change has been created and alter accordingly.

Step Five: Testing the Binocular Lens

Use your binoculars to once again, observe the target. Do you see the same image through both?

Another test you can do is by slowly moving the binoculars away from your eyes after looking through them. A streak of light will most definitely be seen coming out of the lens and you will need to make sure these are fully straight and not crooked.

In case they are not centered or straightened, you will have to make adjustments again since the maximum amount of light is not entering through the lenses.

FAQs

Why do I see double when looking through binoculars?

When a binocular’s components move away from their original position, users cannot access the best focus. Bright light is not centered in the correct spot, creating two carrying images to be created on each lens. When the binoculars are re-collimated, this issue is like to go away.

Can you realign binoculars?

Realigning a pair of binoculars will require assistance from experts as the job is tedious and gravely requires precision to successfully accomplish. Instead, to fix your binocular’s vision, you can try to align the collimation of one side to the other.

How can you make eye adjustments on binoculars?

To adjust a binocular’s eye, you will need to align each of the diopters first. To adjust the left one, put your left eye on the focus ring and observe the eyepiece carefully. Now, you should move the focus ring accordingly till a clear and precise image appears. Once this is done, do the same for the right eye.

Do regular binoculars work at night?

Unfortunately, most regular binoculars are unable to work at night or in the dark. As they have small lenses, the light is unable to enter and strike the center to create a big image for the user. However, specialized binoculars are available for nighttime usage.

Conclusion

You now know how to fix binoculars with double vision. This means that any struggles of seeing different images through each lens will be sorted out, allowing you to use the equipment to its fullest. You can go ahead and enjoy activities like birdwatching, stargazing, hunting, hiking, etc. with your pair of binoculars that work diligently to offer a zoomed-in vision for you.

Remember to keep your binoculars in a safe place and avoid jerking them around to prevent the same problem from occurring in the future. After all, we know that double vision can be rather frustrating to handle.

Have a fun time watching through your bino!

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