Some items you might buy on Ebay auctions:

New 4x30mm Night Vision Surveillance Scope Binoculars

US $0.90 (0 Bid) End Date: Monday Jan-25-2010 2:56:41 PST Bid now | Add to watch list

NEW 4X30MM Surveillance Night Scope Vision Binoculars

US $0.44 (0 Bid) End Date: Monday Jan-25-2010 2:57:57 PST Bid now | Add to watch list

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KM 836 TACTICAL Military Marine compact Binoculars    US $119.99

Bushnell Marine 7x50mm Binoculars    US $115.00

NEW TASCO 7x50mm Waterproof Marine Binoculars OS19    US $45.50

Some items you might buy on Ebay auctions:

Binoculars 4x30mm Night Vision Surveillance Scope

US $0.81 (0 Bid) End Date: Monday Dec-28-2009 2:39:45 PST Bid now | Add to watch list

Kids Toy Binoculars 4X30mm Night Vision Stealth Light

US $7.62 End Date: Monday Dec-28-2009 2:41:36 PST Buy It Now for only: US $7.62 Buy it now | Add to watch list

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STEINER WEST GERMANY MILITARY MARINE BINOCULARS 7X50    US $75.00

7x50 RC MARINE BINOCULARS W ILLUM COMPASS RF RETICLE    US $99.99

Tasco Marine Series Rubber 7x50mm Binoculars W Case    US $.99

WEST MARINE Binoculars 7x50 350ft 1000 yds Field 66    US $.01

WWII CARL ZEISS JENA 6x30 MARINE binoculars MILITARY    US $49.00

Vintage 1973 74 Marine Binoculars Glass Avon Bottle    US $9.99

I bought a pair of 1st generation Seben binoculars and am curious as to what causes the whine when they are active. I understand the principle behind how they work, but what causes the whine?

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Best Match Time: ending soonest Time: newly listed Price: lowest first Price: highest first Price + Shipping: lowest first Price + Shipping: highest first

NEW TASCO 7x50mm Waterproof Marine Binoculars OS19    US $45.50

7x50 MARINE BINOCULARS W RANGEFINDER RETICLE by BARSKA    US $99.99

Avon Marine Binoculars Decanter    US $.99