What does the binocular ratings or specs mean?
Saturday, July 18th, 2009 at
5:34 am
Gerry asked:
I have a pair that says they are 8 x 21 and field 7 but i have no idea what that means?
Reply:
8 refers to the power of the binoculars. They bring objects 8 times closer. 21 refers to the diameter of the objective lens in mm. 7 refers to the field of view in degrees. It is common currently to express field of view in feet per 1000 yards. 7 degrees is about equal to 365 ft at 1000 yards more or less. That is about average.
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Tagged with: Binocular Ratings
LOL
they give a controlled amount of the population a box, that is wired to their tv
say 5000 people, then they take the data, and average it
least thats how they used to do it here in the UK
now with satelite tv it must be much easier to collate the data
A small sample group is chosen, usually for each mode; i.e. Terrestrial, Satellite, Cable – and would include a diverse spectrum of the viewing public like pensioners, typical families, young single adults etc. These groups are paid to have technology installed to monitor their viewing habits as a representation of the wider audience; and therefore the TV ratings can never truly be 100% accurate!
Having said that, new technology allows certain modes such as Cable and Satellite, which have a return path, to send anonymous usage data back to the service provider; in affect snooping on the viewing habits of a much broader sample and returning a more honest picture of the sort of channel hopping that occurs when the viewer is not aware of being monitored.
carl zeiss is the best optics ever made. the binoculars look fantastic and what’s even more better is that the binoculars have lenses from SCHOTT, a special glass and lenses manufacturer that will not let its buyers down!!
Great feature summary!
will a telescope that magnifies 300 times see saturn
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Here is these binoculars feature :-
# optimal device for hunters and outdoor activists who prefer the established form of the binocular
# The Explorer 2000S is splash water protected and is suitable under hardest conditions.
# standardised thread for mounting on a tripod
# eye base as well as dioptre balancing can be adjusted individually
# magnification: 3.1 times
# 50 mm lens diameter
# application range: from 0.5 to 122 m
# field of vision at 100 m: 26 m
# weight: 1.134 kg