Image-Stabilized Binoculars for Astronomy



Imaged-stabilized (IS) binoculars give stunning low power views of the night sky without the dreaded “image shake” of standard binoculars. Based on technology developed for military surveillance and laser-based weaponry, IS binos are amazing high-tech wonders.

Inside the body of the binoculars, piezoelectric motion sensors detect the pitch and yaw motion caused by shaking, over-caffeinated arms. The sensors feed into a microprocessor that initiates image stabilization by controlling a vari-angle prism – a pair of glass plates joined by flexible bellows. The space between the plates is filled with a silicon-based oil to maximize image deflection to correct for the unwanted motion.

The motion sensors work in daylight or total darkness and operate at any orientation, so there are no restrictions on where the binoculars can be pointed… up, down, sideways, anywhere.
You switch on the IS feature by pressing a button.  When you do, the image doesn’t “freeze”, but rather wanders slowly enough for your eye to follow. If your arms shift a little, you’ll still see motion, but it’s much slower and steadier than without the IS feature.  The IS still works when you sweep across a field of view, although there is a slight hesitation.  It takes a few seconds for the IS to kick in, and perhaps 10-15 seconds for the IS to really get ahold of the motion of your slightly shaking arms.

One drawback regarding these binoculars are  these devices are battery hogs. You can burn through a pair of alkalines in 5 minutes on a cold night. With rechargeables, you might get 2 hours, or longer with warmer temperatures.  Of course, you can turn off the IS feature when you’re not using it.

Nikon, Canon, and Fujinon, among others, offer some type of image stabilization. Canon models seem to have the widest following among amateur astronomers.And about the price,A Canon 10 >< 30 set is priced 500 USD which is equal to roughly 22,ooo Indian Rupees.But  the more expensive binoculars give you a brighter view of the stars for sure.

v s/AASTRO

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