Binocular Eyecups

What's the reason for Binocular Eyecups and just what will they mean in my experience?

You will find 3 reasons producers provide Eyecups for field glasses. The first is provide "shade/cover" between your focal lens from the field glasses eyepiece and also the eye and 2, use a "stand-off" in the eye towards the focal lens or eyepiece from the field glasses.

o EYECUPS The eyecups of field glasses or even the extension on the top from the binocular focal eyepiece (the lens you appear through) are usually made from rubber and therefore are known as "rubber eyecups". Some binocular producers have switched to or installed 'metal' or 'plastic' eyecups on their own field glasses like a feature and say these can last longer rubber eyecups and therefore are simpler to function. Binocular rubber eyecups are created to be 'folded' or 'rolled' lower while metal eyecups are created to be 'twisted' up or 'pop' up. It does not matter which type of eyecups your field glasses have so far as the intended reason for the binocular eyecups is worried.

o SHADE/COVER The very first reason for the field glasses eyecups would be to provide shade or cover from sunlight, either direct or indirect, between your eye and also the field glasses eyepiece. Supplying shade or cover between your eye and also the field glasses eyepiece greatly improves the clearness and sharpness from the object being seen with the field glasses by reduction of glare to the focal lens from the field glasses and also the eye. Binocular eyecups ought to always be within the 'up' or normal position when viewing using your field glasses if you're not putting on glasses. If you're putting on glasses for corrective vision or shades and don't want to get rid of them before viewing using your field glasses, fold or twist the field glasses eyecups lower before viewing. This can bring the field glasses nearer to your vision while supplying the approximate eye to lens stand-from the field glasses (talked about within the nest paragraph). Once the field glasses eyecups have been in the lower position for glasses use, the binocular eyecups provide hardly any shade/cover from outdoors light sources.

o STAND-OFF Binocular stand-off is known to by binocular producers as "eye relief". This is actually the distance in the eye towards the focal lens from the field glasses that provides the finest ability from the field glasses 'full area of view" in millimeters when held that distance in the eye. Example, Eye relief = 15mm. Eye relief ranges between 5mm to 20mm based on lens diameters. Most binocular producers design their eyecups, whether rubber, plastic or metal to some length that provides the approximate eye relief distance designated within their specifications. Quite simply, when the field glasses eye relief is 15mm, the field glasses eyecups are usually 15mm long in the eyepiece lens to in which the eyecups will touch your eyelids or brow, developing a 15mm stand-off for that optimum area of look at the field glasses.

o GLASSES Users Should you put on glasses it's suggested that you simply remove your glasses when viewing using your field glasses in case your vision is really that you could focus clearly without one. For most of us that put on glasses this really is not a problem however for some, especially individuals with astigmatisms, this isn't always the very best situation for obvious, sharp binocular viewing. Viewing using your field glasses without your glasses when you are able still focus clearly will give you the very best viewing using your field glasses so far as eye relief/stand-off and lightweight glare are worried.

To conclude, now you know the objective of binocular eyecups hopefully you'll have the ability to view more clearly and glare free with your binocular eyecups because they specified for and intended as used.

ADDITIONAL EYECUPS NOTE: Store your field glasses within their situation or wherever you store all of them with the eyecups within the "UP POSITION" especially if they're rubber. This prevents strain and stress from the rubber where it folds over, which over lengthy amounts of time could cause stretching as well as cracking from the rubber binocular eyecups. Also, in most cases, the field glasses protective lens covers are made to fit within the binocular eyecups within the 'up' position. The field glasses lens covers won't easily fit in the lower or folded position. Keep binocular lens covers on whatsoever occasions if not viewing.