topic Re: Strange sounds on A7C with 24mmGM in Alpha & NEX interchangeable lens cameras

Strange sounds on A7C with 24mmGM

SIlvijare — Fri, 19 Mar 2021 17:53:11 GMT

I just got a new A7C with a 24mm 1.4 GM lens. When I tried out the video mode I ran into a problem that I can't find a solution for.

It seems like the in-camera mic is picking up the sound of the lens, but it is not the usual mechanical focusing sounds that other people are referring to. It is a pretty electronic high pitch sound that sounds just like the stations on the radio would be changed: https://youtu.be/OzXdvuftmi4

I tried updating the lens, turning on/off autofocus, changing modes, dialling down mic sensitivity, turning off all the wifi and Bluetooth etc. When I take the lens off, the interference sound is gone, but that seems to be the only thing. The lens hasn’t been damaged.

Does anyone have any ideas of what it could be?

Betreff: Strange sounds on A7C with 24mmGM

Peter_S. — Sat, 20 Mar 2021 13:09:56 GMT

Hi,

That's normal behaviour - the high pitch sound is probably coming from the linear motor which sounds like this.

I would recommend an external microphone to get rid of this noise.

Cheers

Peter

Re: Strange sounds on A7C with 24mmGM

Pentium_Gladio — Thu, 25 Mar 2021 17:58:59 GMT

Hi,

Have you tried a different lens? Does the sound go a away using an external microphone as well?

Regards,

Pentium_Gladio

Re: Strange sounds on A7C with 24mmGM

barezina — Sat, 12 Jul 2025 04:04:36 GMT

I know this is an old post but.. my sony 24-105mm F4 G lens (SEL24105G) started making a high pitch noise that was being picked up by my mic (a7s3). Sony repaired under warranty. These are not 'normal operational' noises.

Noise example here: https://youtu.be/ECEZdcBdOss?si=Uy0dvOYUEXY6b6jZ