Binos or my eyes

[addicted]

hunting the last few days i found that looking through my binos i see double. it didnt start happening until this weekend. at about 50 yards the doubles are about 2 feet apart.  Is it my eyes/brain going screwy or is there something up with my binos?   What my left eye sees is up at a 45 degree angle from what my right eye sees but only through my binos.  maybe i'm just going batchit crazy.

[robodad]

Were they dropped ?? I had a pair that I seen double through but my kids had played with them so I am sure it's the binos and not your eyes !!! 

[stumprat]

It's the binos. I have had a couple pair do that. Do they have a lifetime warranty?

[addicted]

bushnell 8x42's i dunno.
i really like them too.

guess i should just do the right thing and get the sworo's

[shoot-em-dead]

Are your eyes still messed up after you put down the binos. My eyes do that if I look through certain scopes. Put the scope down and my right eye wants to stay zoomed out. Really makes it frustrating at the range.

[addicted]

sometimes my eyes have trouble focusing after looking downrange in a scope for awhile but i didnt notice it with the binos. i goofed off testing them for an hour and a half watching a doe friday night.

close one eye then open
close the other
adjust binos all the way one direction
adjust the other direction
cover one side with my hand
cove the other side
look through the binos backwards
real scientific stuff ya know

[shoot-em-dead]

There should be an adjustment on one of the eye pieces. To adjust to your eyes- figure out what side of the eye piece turns and close that eye. Adjust the binocs with the main adjuster on top looking through with just the one eye. Then open your other eye and slowly turn the eye piece. Things should come into focus much better. You may have to adjust a few times before you have the best clarity. Like I said my eyes are messed up so anytime anyone else uses my binos, I have to do this step.

[addicted]

i already have the right eye cup adjusted to my eyes. i played with it after the double vision started happening as well.

[Steve C]

Unless you have noticed some deterioration in your normal eyesight, which it does not sound like you have, what you are describing is a classic case of mis collimated optics and will need to be repaired or replaced.

There are a couple of quick collimation checks you can do yourself.  First is to focus on something like a power line.  Slowly move the binocular away from the eye.  If the power line remains a single line the collimation is probably OK.  If the power line splits when you do that, it is not.  Second thing is to pick a distant object and move the binocular slowly away from the eye (keeping care to keep looking through the exit pupils in both instances).  If this shows two distant objects, collimation (alignment of the barrels or prisms) is out of whack.  If the two exit pupil diameters never merge on the same object (or show as any part of two circles) even as you move even a millimeter or so away from the eye cup, the collimation is bad.

That can come from being hit or bumped, or some glued element inside the binocular has had the glue go bad.  Depending on warranty coverage or not (you didn't say what binocular) it may cost up to $100 to fix that, depending on how much is wrong. ALso, depending on the binocular it may not be fixable.

[addicted]

they were pretty cheap. all it says on them is bushnell waterproof 10x42. i probably bumped them getting out of a stand or something.  it fits the testing criteria you listed steve for mis collimation.

[follow maggie]

Have a couple drinks and look again.

[addicted]

  OH, there it is

[whacker1]

Are the Swaro's any cheaper in Germany?  Might be worth making a purchase while you are stationed over there vs. coming home to buy them.

[BLKBEARKLR]

sounds like optics, I had a pair do the exact same thing sent them in and got a new set in return

[addicted]

Are the Swaro's any cheaper in Germany?  Might be worth making a purchase while you are stationed over there vs. coming home to buy them.

sworo's, schmidt and bender, and zeiss all tend to be a little cheaper here if you look hard.