In article <30EEDABA.642B@ridgecrest.ca.us>, ajain@ridgecrest.ca.us says...
>Does anyone have any pointers as to where I could get info on >gyro-stabilizers, used to support aerial cameras for air-to-ground
>photography? Any hints would be appreciated.

Hmmm.... You probably saw the one I have for sale in rec.photo. marketplace... There's nothing like hands-on experience! (;-)
But seriously, they are useful for almost any photography where
you or your location is unsteady (ladders, planes, boats, cars,
etc.), or the light is too low for hand-holding, but you want to
hand-hold anyway. The Ken-Lab gyro is a cylinder with a tripod
screw for mounting to a lens, camera, or binoculars. It is
attached to a high-voltage AC power supply with a longish coiled
cord. Most of the supply weight and volume is a 12 volt gel-cell.
There is a tiny charger for the battery. When hand-holding, the
KS-4 (a good compromise between efficacy and size, weight, and
price [These gadgets are pricey!]), you gain about 2 stops lower
shutter speed than you could normally use with almost any lens.
When on an unsteady platform, it makes it easier to get sharp
pictures. Two gyros in a partial vacuum in the cylinder spin
about 20,000 cps, giving a strong resistance to changes in two
of the three posible axes (rotation around the lens axis is less important than horizontal and vertical turns of the lens). The
gyro takes about 10 minutes to get up to speed, runs about 4
hours on a charge, and takes about 20 minutes to run down after
the power is turned off. It makes a high-pitched whine in
operation, so is not suitable for use where silence is necessary,
though, even for street shooting, it doesn't attract attention
(it is black and small, and the noise is not loud). Ken-Labs
(as far as I know, the only manufacturer) makes four models:
the KS-2 (too small), KS-4, KS-6 (same size, but heavier gyro wheels and price), and the large, heavy, and very expensive KS-8. Anything else you wanted to know?
Hope This Helps