4

I have a Sony Alpha a55.

When I take a long exposure photo, while the shutter is open, the camera makes a whirring sound. What causes this noise and why is it necessary to the camera's operation? (I have interface sounds turned off — so I suppose this is some piece of the hardware physically making a noise.)

| improve this question | |
10

I'm familiar with Canon lenses featuring Image Stabilization that can emit a faint "whir" as IS operates. Your Sony body has a form of image stabilization built into the body, and if that's on during a long exposure, you might be hearing that as it operates.

If you're shooting long-exposure shots with the camera mounted on a tripod (which would be best), it's usually recommended that image stabilization be turned off (I believe this to be the case for your a55).

| improve this answer | |
  • Can you expand on your last point? What's the benefit in turning off image stabilization? – jtbandes Apr 4 '12 at 17:45
  • 2
    I've heard it described as the stabilization getting itself into a form of feedback loop with itself. As far as I know, this problem can vary from one implementation to the next, so in some cases, it's not really a problem at all. Any time you're using a good tripod, though, you shouldn't need any stabilization, so there's little harm in turning it off. – D. Lambert Apr 4 '12 at 18:08
  • We have a winner! I tried disabling SteadyShot and the noise went away. Thanks! – jtbandes Apr 4 '12 at 20:26
  • Glad to hear it! – D. Lambert Apr 4 '12 at 20:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.