Focus Issue

[TheShootist]

I'm having an issue with my eyes focusing after looking through a set of 15x56 Cabela's Euros (Meopta). After glassing for anything more than a few seconds, and coming off of the binoculars it takes ten seconds for my eyes to adjust their focus. I also run a set of Zeiss Victory SF's in 10x42, but do not have this issue, same goes for my Razor spotter. I'm assuming it's something in the magic of physics with the 15x56's that's causing the issue?

I have a hard time getting the 15x56's to look just right- I noticed the IPD is 74MM while my eyes measure out at 76mm (big head problems). Could this be a contributing factor?

I think the Meopta is good glass, but something doesn't seem to be working for me, just wondered if anyone had any experience with this issue.

 

[prconnection]

Interesting post.......looking forward to hearing responses from others. I have heard nothing but good about meopta glass.

 

[Owenst7]

I'm having an issue with my eyes focusing after looking through a set of 15x56 Cabela's Euros (Meopta). After glassing for anything more than a few seconds, and coming off of the binoculars it takes ten seconds for my eyes to adjust their focus. I also run a set of Zeiss Victory SF's in 10x42, but do not have this issue, same goes for my Razor spotter. I'm assuming it's something in the magic of physics with the 15x56's that's causing the issue?

I have a hard time getting the 15x56's to look just right- I noticed the IPD is 74MM while my eyes measure out at 76mm (big head problems). Could this be a contributing factor?

I think the Meopta is good glass, but something doesn't seem to be working for me, just wondered if anyone had any experience with this issue.

I am very far from an expert on eyes, but I do occasionally order my own eyeglasses online. If I'm even a mm off, I find it makes me feel kind of dizzy, but my eyes will try to correct for it. I'm only 62mm, but I probably would not purchase a pair of binos that maxed out at 60 just because I'd assume they'd never look right for me.

Have you had someone with a narrower face check them out and see if they work fine for them?

 

[huntsman22]

IPD or collimation.......

 

[Steve C]

Take the 15x56 and center the image on a roof top or power wires. Gently ease your eyes back from the eye pieces to where you are beginning to look through the exit pupil. You will start to get the movie view of a figure 8 image this way. If the lines begin to separate into two images with the line splitting in the middle you have a collimation issue. Use a tripod or very solid rest and try to keep your hands off the glass.

 

[rayporter]

^^this-
close one eye and look through one side for a few minuets then do the other side. open both eyes and if the problem starts right up you will know.

 

[TheShootist]

Okay- based on Steve’s advice it’s definitely a collimation issue- I have noticed that it felt like I had two video feeds running at once, as opposed to one single view. Probably why I got a smoking deal on them out of the bargain cave! I’ll have to get with Meopta. Thanks!


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[PathFinder]

I had the same problem with a pair of those. Somehow they get misaligned, I think because the frame isn't strong enough. They exchanged mine for a new pair.

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[Steve C]

Length and weight are the likely issues. Weight generates stronger vibrations, and longer length gives the vibrations more room to raise hell. With a big optical instrument things can get weird, even if you think the issue was non existent or minor. Meopta has a pretty good record, as far as I know, of being pretty rugged.