Focusing on birds at 10-12m isn't possible as the close focus of the WX 10x50 is 20m. That's another reason the WX is not an ideal birding tool: my experience is that even a 6m close focus (for example, Canon 12x36 IS) can be too much in some cases.I'm sure that if I had a 10x50 WX, I'd also try it for birding, hand-held. More likely, with a finnstick. I have a friend who has quite often used the Zeiss 15x60 hand-held or with a finnstick, and that is almost as big as the WX and has higher magnification also. The biggest issue would be individual focus, so I'd probably make index markings on both eyepieces (with tape or such so as not to permanently change the looks of this collectible binocular) for infinity focus, ca 100 meters and close-up range, perhaps 10-12 meters or whatever is the most common "little birds in a nearby tree" distance.
- Kimmo
Only if there also was a talking cat (or dog) in it---not too many hits for pure binos videos.It would be a funny vision of someone wearing one of those foreign legion hats, tall rubber boots with a WX trudging through a marsh - watching how they focus. It would be a hit on u-tube.
For the human eye the difference between 100 m and infinity is negligible, but through a 10x binocular it's one whole dioptre!A fair portion ov my birding takes place at infinity, and focusing is quite unnecessary. (I seem to keep fiddling with it, nonetheless)
If you were doing resolution measurements that would be a sensible distance for the tests. However, in practice many instruments will perform satisfactorily at much closer distances. My 10x42EL (focal length 150-160 mm?) has a close focus capability of 1,5 m, which is only about 10 focal lengths.I seem to recall that it is defined at 100 focal lengths, so for the human eye, that would seem to be somewhat closer than 100 yards. No clue where I read that.
Completely unrelated. You mentioned 100 focal lengths as approximating infinity and IIRC this is the distance Henry suggested for conducting resolution measurements on scopes. It may even be the distance at which optical designers compute the objectives of binoculars and scopes for the best compromise of the various aberrations. I merely pointed out that many binoculars and scopes can still provide visually acceptable images at much closer distances.How are you equating infinity with closest possible focus?