Thread: Midget binos

Originally Posted by Maxx

Why, specifically?

Many reasons for eye strain with binoculars. One can be that the prisms are not correctly aligned so the two visual axes are not parallel. The bigger the magnification, the more that will be a problem. Even a fraction of a hairs breadth out may cause eye strain. With an expensive pair of binos, you'd have to ask, were they dropped real hard?

Other causes can be the binos are too heavy. Or too much magnification (shaky image and having to pan too much).

If the exit pupil is small, say in a pair of 10x25s with 2.5mm exit pupil, the binoculars are not so forgiving of eye positioning as some 7x35s which have twice as wide exit pupil (the width of the shaft of light coming out the eyepiece).

Don't do this for too long, but monocular telescopes have a use for that closer look, if you haven't got zoom telescopic sights for that use:



A short blurb on the use of telescopes in "upland deerstalking" from Why do upland deer stalkers seem to prefer telescopes? - Shooting UK

There’s a number of reasons the main one being that for any given magnification a telescope will be smaller and lighter than an equivalent set of binoculars.
Trying to assess a stag’s head from up to a mile away would require a colossal (and heavy) set of binos but an equivalent scope would be a quarter of the size and weight.
Furthermore a scope is much easier to hold steady in a prone position and for studying detail at long range there’s really no substitute.
The reason binoculars are so popular closer to sea level is because they have a wider field of view and are far easier to use from a standing or sitting position around fields and woods where ranges are shorter.