Michael,
As a rule of thumb, the bigger the front end, the brighter the image
and the better the glass the brighter the image. The higher the mag ,
the narrower the field of view, which at short range may not be that
much of an issue. To meet the rest of your criteria, I think you would
have to look at military or marine specification bins. Steiner, with
their Military R range, seem to have a lot of the market, though you
might like to look at the Pyser-SGI range http://www.pyser-sgi.com/images/thumbnails/Defence_Files/Military
Binoculars.pdf They are suppliers to the UK military. Also have a
look at http://www.quicktest.co.uk/military_binoculars.htm for some
alternatives. As for scuba diving, I suggest sonar.
Cheers,
Carl Clifford
On 08/03/2011, at 1:01 PM, Michael Hunter wrote:
Hi All,
While on the subject of binoculars, I am wondering whether
10 x 42 is the best magnification x lens diameter combination for
gloomy forest conditions or other low light situations where the
quarry is not more than about 30m away from the observer, and
magnification is not the major requirement.
Would optically equivalent (in quality) 7 x 50 give better
light sensitivity and colour discrimination than say 10 x 42 or 10 x
50 ?
Close focus distance and rapid focus also relevant, as
well as waterproofness in rainy humid conditions if not for scuba
diving.
Any suggestions?
Cheers
Michael
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