Magnacraft® 10×50 Astronomical Binoculars With Case
Wednesday, December 23rd, 2009 at
9:48 pm
Here are some items you might buy on Ebay auctions:
Magnacraft® 12x60 Wide Angle Astronomical Binoculars
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US $21.99 End Date: Thursday Dec-24-2009 1:55:02 PST Buy It Now for only: US $21.99 Buy it now | Add to watch list |
Magnacraft® 10x50 Astronomical Binoculars with Case
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US $16.99 End Date: Thursday Dec-24-2009 1:55:42 PST Buy It Now for only: US $16.99 Buy it now | Add to watch list |
US $29.95
is there like anything left to micowave ?
Thanks for posting, just started watching too:)
List Price $99.99 Now $36.89 with Free Shipping
Nikon 7510 Travelite 10 X 25 mm V Binoculars
by Nikon
(27)
Buy new: $144.95 $61.71
22 used & new from $61.71
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I'm afraid much of David A's answer is incorrect. The 60 number is the magnification. it makes the image seem 60 times bigger, not nearer. The second number is the the entrance pupil diameter, effectively the diameter in mm of the front lens.
To see as clearly as possible at night one needs to ensure that the eye is collecting as much light as possible. The pupil diameter of the eye is usually considered to be about 8mm (for instrument design). To find this in a telescope divide the second number by the first. In your example 35 / 60 = 0.6.
This value needs to be as large as possible. In this example the area of your eye pupil divided by the exit pupil of the telescope is the square of (0.6/8) = 0.006. Hence compared to the naked eye you can expect the scene to be only 0.6% as bright as seen by the unaided eye.
This may seem disastrous. However, what it tells you is that you cannot have such a large magnification for terrestrial binoculars. A more sensible specification would be 8 x 60. or 10 x 75. These magnification and pupil sizes will give little loss of brightness.
Jandy: I sure hope Buzz has its own place — that seems very important.
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What are the scope specs?
hahahaha yeah
The Cuban Missile Crisis of 1963. The USSR under Nikita Kruchef put nuclear missiles in Cuba 90 miles from our shores and Kennedy made them remove them. We almost went to war. But they pulled them out. Thank God.
ummm excuse me, what about that sniper shot you did from earlier? You were on a building with binoculars? JFK shot?