Light headache!! Help (1 Viewer)

robinsoncristobalpmg · May 29, 2016

Hello, the thing is that I have bought recently a Carl Zeiss Jena Deltrintem 8x30. The optics are really really good, all seems to be in order. But when I use them for a while, I start to have a little headache, and my eyes feel a little bit weird without them. The collimation is perfect (or that is what I think). I never see double image, even when I try it! However after a while I have a little headache.
I really do not know what is it. Is the diopter adjustement a really important thing? I adjust them often. The distance between eyes seems to be good, I do it automatically.
Can somebody help me? Is it a cuestion of time and then I will adapt me?
Many thanks.

ceasar · May 29, 2016

robinsoncristobalpmg said:
Hello, the thing is that I have bought recently a Carl Zeiss Jena Deltrintem 8x30. The optics are really really good, all seems to be in order. But when I use them for a while, I start to have a little headache, and my eyes feel a little bit weird without them. The collimation is perfect (or that is what I think). I never see double image, even when I try it! However after a while I have a little headache.
I really do not know what is it. Is the diopter adjustement a really important thing? I adjust them often. The distance between eyes seems to be good, I do it automatically.
Can somebody help me? Is it a cuestion of time and then I will adapt me?
Many thanks.

Check the binocular for collimation again.

Focus it sharply on a vertical telephone pole. Remove the binocular from your eyes. Wait a minute or so and then quickly put it back up to your eyes and look at the pole again. If you see even the hint of 2 telephone poles in the first split second after you have brought it up to your eyes you have a collimation problem.

Try it on a horizontal straight line too.

Bob

robinsoncristobalpmg · May 29, 2016

ceasar said:
Check them for collimation again.

Focus it sharply on a vertical telephone pole. Remove the binocular from your eyes. Wait a minute or so and then quickly put it back up to your eyes and look at the pole again. If you see even the hint of 2 telephone poles in the first split second after you have brought them up to your eyes you have a collimation problem.

Try it on a horizontal straight line too.

Bob

Ok, I will test that tommorow. But, as I said, I do not see any hint of descollimation, even when I do not use them for a long time and put them back up to my eyes. I test them tommorow.

JerryLogan · May 30, 2016

robinsoncristobalpmg said:
Ok, I will test that tommorow. But, as I said, I do not see any hint of descollimation, even when I do not use them for a long time and put them back up to my eyes. I test them tommorow.

Or, you're super accommodating! A quick test that overcomes your brain's effort to make things right - mount the binoculars on a tripod or other stable surface focused on a star or distant, single bright light. Totally de-focus the diopter objective. When you look again the focused object image of one barrel should be centered in the de-focused blur of the other. If they're not centered the binoculars are out of collimation.

Best,
Jerry

jring · May 30, 2016

Sounds like slight decollimation which is fixed by your brain... Jerry's instructions are sound and should do the trick testing it.

Joachim

akltsang · May 30, 2016

Fix the bins on a tripod, then look at the upper and lower parts of the images on left and right barrels alternatively. You will find out how much the discollimation is.

robinsoncristobalpmg · May 30, 2016

Oh yes, I think you are all right! I tried the experiments, and I also blinked with one eye and with the other, and I saw that there was a little difference on the distance between the 2 images. I did not think that my brain maked all these adjustements! And I could not tell that they were out of collimation, because when I saw through them for the first time they were perfect! I am really sad, and I do not know what to do now.

ceasar · May 30, 2016

A good binocular technician can usually fix bad collimation in Porro prism binoculars quickly. For a reasonable fee, of course. This Zeiss is worth fixing if the price is reasonable. I'm sure there are a few technicians in Germany you can contact to do this. I expect you will be getting some recommendations here shortly.

Bob

robinsoncristobalpmg · May 30, 2016

ceasar said:
A good binocular technician can usually fix bad collimation in Porro prism binoculars quickly. For a reasonable fee, of course. This Zeiss is worth fixing if the price is reasonable. I'm sure there are a few technicians in Germany you can contact to do this. I expect you will be getting some recommendations here shortly.

Bob

Thank you!

JerryLogan · May 30, 2016

robinsoncristobalpmg said:
Oh yes, I think you are all right! I tried the experiments, and I also blinked with one eye and with the other, and I saw that there was a little difference on the distance between the 2 images. I did not think that my brain maked all these adjustements! And I could not tell that they were out of collimation, because when I saw through them for the first time they were perfect! I am really sad, and I do not know what to do now.

No worries! It's usually an easy fix. I'm sure there are many German shops but if you're feeling a little international - Go Dutch! http://www.dekijkerspecialist.nl/

Best,
Jerry

tom666 · May 30, 2016

robinsoncristobalpmg said:
Oh yes, I think you are all right! I tried the experiments, and little difference on the distance between the 2 images. I did not think that my braiI also blinked with one eye and with the other, and I saw that there was a n maked all these adjustements! And I could not tell that they were out of collimation, because when I saw through them for the first time they were perfect! I am really sad, and I do not know what to do now.

What's the ''little difference'' between the 2 images? Because if it is 6-7 cm horizontal may be it is the distance between the 2 barrels (inerpupillary distance)?

robinsoncristobalpmg · May 31, 2016

tom666 said:
What's the ''little difference'' between the 2 images? Because if it is 6-7 cm horizontal may be it is the distance between the 2 barrels (inerpupillary distance)?

When I blink, first with one eye and then with the other one, I see the right image below than the left one. But, now that you say, I am not sure when my case means that my binoculars are out of collimation, or these difference it is normal.
As I said, the difference its not big.

jring · May 31, 2016

Hi,

vertical decollimation is harder on the brain than horizontal, so even a little bit can lead to headaches. Yes, if you like those bins, you should get them fixed.

Joachim

akltsang · May 31, 2016

Try this if you are skillful enough. I used this method to restore the collimation of a Zeiss Decarem before.

https://sites.google.com/site/rchamon/home/sun-images-method-for-collimation-of-binoculars

jring · May 31, 2016

Thanks for the links - I vaguely remember having seen this method described in spanish and google translated before but didn't really get it in the machine translation. An english version is great and I'll probably try it with some of my offenders.

And to cite a well known menber of BF currently on a forum hiatus: Contrary to popular belief, real collimation (so it works for all IPDs and not just one) is not very easy to do and needs either specialized tools or a tricky method like the one mentioned above.

Joachim

robinsoncristobalpmg · May 31, 2016

Thank you thank you very much!! I have found a store in which they can repair my binoculars. And I hope so!! Thank god that these webpage and these people exist!

WJC · Jun 10, 2016

ceasar said:
A good binocular technician can usually fix bad collimation in Porro prism binoculars quickly. For a reasonable fee, of course. This Zeiss is worth fixing if the price is reasonable. I'm sure there are a few technicians in Germany you can contact to do this. I expect you will be getting some recommendations here shortly.

Bob

Unless they have changed their policy, they do not work on out of warranty binos, and that old ... they're out. That's why they helped put my kids through school. :cat:

Bill

mfunnell · Jun 10, 2016

Bill,

Sideways to the point of this thread, of course, but good to have you posting again. And at least the thread subject is close to your heart.

...Mike

ceasar · Jun 10, 2016

mfunnell said:
Bill,

Sideways to the point of this thread, of course, but good to have you posting again. And at least the thread subject is close to your heart.

...Mike

Yes!:t::t:

Bob

jring · Jun 10, 2016

Welcome back, Bill!

Joachim

Light headache!! Help (1 Viewer)

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