binocular recommendations revisited

Mar 25th, 2012, 05:41 PM
Join Date: Apr 2005
Posts: 5,215
Big 5. Got those, but I'm still looking for 2 of the "little 5". Missing 2 of them. Since little 5, maybe I should search with binocs backwards???

regards - tom
cary999 is offline  
Mar 25th, 2012, 07:09 PM
Join Date: Jan 2003
Posts: 4,859
Aloha, So happy to have been able to help. Hope he loves them and sees many amazing things.
TC is offline  
Mar 28th, 2012, 10:39 AM
Join Date: Jan 2006
Posts: 1,490
live_aloha here's the secret: to save time i've chosen a text from a random site + i've added some remarks in red

Adjusting binoculars

Many people have difficulty in looking through binoculars. They may see black edges or they cannot focus them or they may encounter other problems.

This is quite understandable because you need to adjust the binoculars before you can use them effectively. To do this, follow the steps below:

1 Adjust the eye cups. Do you wear glasses or not?

Binoculars nearly always come equipped with eye cups which you can either turn inwards or outwards or fold down. These eye cups ensure that the distance between your eyes and the binoculars is correct. This is important because otherwise you would not be able to see a complete image and the image would not be bright and clear.
If you wear glasses, you should turn the eye cups inwards or fold them in. If you do not wear glasses, you need to turn the eye cups outwards or fold them out.

2 Adjusting the interpupillary distance

It is important to adjust the width of the binoculars (more specifically, the distance between the ocular lenses) to the distance between your eyes. To adjust this interpupillary distance, simply turn the two halves of the binoculars inwards or outwards until you can see a single perfect circle with both eyes separately. You can check this by closing first your right eye and then your left eye without adjusting the binoculars.

3 Adjusting dioptric correction this is the real adjustment

The dioptric adjustment setting allows you to compensate for the differences in strength between your right eye and your left eye. The adjustment setting is usually located on the right ocular lens but sometimes also behind the centre focusing wheel and sometimes you can adjust the dioptre by pulling out the centre focus knob.
To adjust the dioptre, first choose an object that is a reasonable distance away from you. not at the nearest or farthest focal point! (e.g. some text you can't read without binocs) Close your right eye wrong! cover the objective lens with a lens cap or your palm. keep both eyes open and use the centre focusing wheel to bring the object into sharp focus. Now with your left eye closed, same as last comment use the dioptre adjustment setting only (do not adjust the centre focusing wheel) to bring your right eye into sharp focus.

4 Focusing your binoculars

The only thing you still have to do is focus on the object you would like to using the central focusing wheel only. Do this in a way that you can see clearly at once. If anything is slightly off centre, your eyes will attempt to compensate this and even though you may sometimes see clearly, you will find that it causes eye fatigue.
aby is offline  
Mar 28th, 2012, 10:42 AM
Join Date: Jan 2006
Posts: 1,490
here's a good explanation + an illustration
aby is offline  
Mar 28th, 2012, 10:46 AM
Join Date: Jan 2006
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Here is a very good explanation
[well, it includes my remarks ]
aby is offline  
Mar 28th, 2012, 10:52 AM
Join Date: Jan 2006
Posts: 1,490

comparing the 10X50 to the 8X40 (you've made the decision, but for the other readers:

though 10 is a greater magnification, it is heavier
and there's another parameter to be considered: angle of view
usually the 8X will have a wider angle of view (easier to catch the faraway hiding cheetah or flying bird) unless the binoculars are labeled "wide angle" (recommended!!)
the number of degrees usually shows on the binocs

happy observations!

aby is offline  

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