Does IS whir?

If you put your ear or maybe a stethoscope up to a camera or lens with
IS can you hear a whir? Is that how they work - little gimbals?

Thanks,
Ron

Image stabilizers are using "gyro sensors" to detect angular movement of the
camera. Some of them use rotating parts, others are solid state gyro
sensors, all rely on inertial forces. The sensors output a signal indicating
the movement to a processor which in turn drives some form of motor to move
optical parts or the image sensor in the camera for compensation.

schrieb im Newsbeitrag
ups.com...
If you put your ear or maybe a stethoscope up to a camera or lens with
IS can you hear a whir? Is that how they work - little gimbals?

Thanks,
Ron

Cgiorgio wrote:
Image stabilizers are using "gyro sensors" to detect angular movement of the
camera. Some of them use rotating parts, others are solid state gyro
sensors, all rely on inertial forces. The sensors output a signal indicating
the movement to a processor which in turn drives some form of motor to move
optical parts or the image sensor in the camera for compensation.

Do the ones that rotate sell on the higher-end equipment or the lower
end?

Thanks,
Ron

In the case of Pentax K100D and K10D they use magnets.

R


"Cgiorgio" wrote in message
...
Image stabilizers are using "gyro sensors" to detect angular movement of
the camera. Some of them use rotating parts, others are solid state gyro
sensors, all rely on inertial forces. The sensors output a signal
indicating the movement to a processor which in turn drives some form of
motor to move optical parts or the image sensor in the camera for
compensation.

schrieb im Newsbeitrag
ups.com...
If you put your ear or maybe a stethoscope up to a camera or lens with
IS can you hear a whir? Is that how they work - little gimbals?

Thanks,
Ron

In article . com,
" wrote:

If you put your ear or maybe a stethoscope up to a camera or lens with
IS can you hear a whir? Is that how they work - little gimbals?

Thanks,
Ron

They don't need to have spinning parts. Gyroscopes are used for
ultra-sensitive motion detection. A lens can use accelerometers.

The Canon 70-300 DO IS lens makes noise but it's probably dithered motor
control to eliminate the need for bulky and inefficient analog power
amplifiers. It resembles the sound that the tracking motors on some CD
player lenses make, but deeper.

Solid state gyro - sensors are just later technology, probably cheaper to
make, have possibly a longer lifespan (which does not help when the system
life is limited by other components) and can be built smaller. Power
requirements may also be lower for solid state, but it really has nothing to
do with "high end" or "low end".

schrieb im Newsbeitrag
oups.com...

Cgiorgio wrote:
Image stabilizers are using "gyro sensors" to detect angular movement of
the
camera. Some of them use rotating parts, others are solid state gyro
sensors, all rely on inertial forces. The sensors output a signal
indicating
the movement to a processor which in turn drives some form of motor to
move
optical parts or the image sensor in the camera for compensation.

Do the ones that rotate sell on the higher-end equipment or the lower
end?

Thanks,
Ron

Kevin McMurtrie wrote:

The Canon 70-300 DO IS lens makes noise but it's probably dithered motor
control to eliminate the need for bulky and inefficient analog power
amplifiers. It resembles the sound that the tracking motors on some CD
player lenses make, but deeper.

I shouldn't be disappointed, but for some reason I wanted them to use
gyroscopes.
I am glad they at least make noise.

Thanks for the information,
Ron

wrote:
Cgiorgio wrote:
Image stabilizers are using "gyro sensors" to detect angular movement of the
camera. Some of them use rotating parts, others are solid state gyro
sensors, all rely on inertial forces. The sensors output a signal indicating
the movement to a processor which in turn drives some form of motor to move
optical parts or the image sensor in the camera for compensation.

Do the ones that rotate sell on the higher-end equipment or the lower
end?

If mechanically rotating gyro sensors are in use at all, they're on
the very, outlandishly, exotically high end.


--
--Bryan

wrote:
If you put your ear or maybe a stethoscope up to a camera or lens with
IS can you hear a whir? Is that how they work - little gimbals?

If you're listening for gyroscopes in a Canon, Nikon, Pentax, or
Minolta/Sony image-stabilization system, no, you won't hear them.
The gyro sensors are electronic devices with no moving mechanical
parts.

Outside the gyro sensors, the systems do move some element, to
compensate for pitch and yaw. Don't know whether the mounts are
properly "gimbals".

Do they whir? Having neither an IS lens/body nor a stethoscope
handy, I can't say for sure. I'd guess not, but I've been
surprised by noises from various tech gadgets.


--
--Bryan

Hebee Jeebes wrote:
In the case of Pentax K100D and K10D they use magnets.

O.K.; they use magnets.
For what, and what does it have to do with the question here?



--
--Bryan