We have in the past talked about whether these have a place in cloudwatching. Now comes technology new to me, in the ST In Gear section 22.01.12:
Canon 10x30 IS (£320) with electronic Image Stabilizer (not without some chromatic aberration). The reviewer could freeze stars and see the bands of Jupiter.
Would these be good for clouds, do you think?
This message has been edited by beacontrigpoint on Jan 25, 2012 11:21 PM
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Being able to freeze stars or any movement through binoculars seems a good idea. In her dotage, GWW finds that using binoculars to look at stars means the images are very mobile, even though at her advancing age she thought her hands were still relatively steady! Using a camera tripod or balancing binoculars on a wall or gatepost doesn't seem to help with stars, although it does assist with looking at far-off clouds. If those new binoculars work by eliminating the shakes, that would be great.
By the way, on the subject of twinkling/shimmering/trembling stars does anyone in CAS know why Sirius (the Dog Star) near the bottom left of constellation Orion seems to flicker at a regular interval through the colours yellow,red,green,blue, yellow etc. etc. in a continuous cycle? Sorry to get off the subject of clouds, but this phenomenon has had me guessing for many years! GWW
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The short answer is because it is so low to the horizon most of the time. The light the star emits only reaches us by passing through more of the atmosphere when it is observed when low in the sky, it ends up getting difracted more ( much like light through a prism) hence the flickering and multiple colors. A great resource for finding out about binoculars would be cloudynights the binocular forum.
Charles
Skywatching, Astronomy, and Weather spotting NWS Spotter 10-201
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