Nick53
Likes Bikes and Dirt
Ahh ok. This may be a basic question but how do you go about turning AGC off then? Is it as simple as putting sound recording to 'manual' instead of 'auto' or is there a specific AGC off button that I have been missing. I've been putting it onto manual and not even 1/5 of the way up on the recording level option.The hiss is probably the AGC (AutoGainControl). It will get worse when it is quiet as the camera automatically raises the audio recording level as it tries to lift what little sound there is, creating a hiss. You can turn the AGC off but when you do, also make sure you turn the record level down. The pre amps on these DSLR's are not great so you want to turn them down as much as possible.
The other thing it could be is the IS motors in the lens. With IS turned on, I can hear the motors when there is very little ambient noise. Try turning the IS on your lens off and see if that helps.
Pretty sure it is not the IS on the lens. I've tried turning it off and using it with a lens that doesn't have IS and it is all still the same. It's okay in most situations although say when I'm doing an interview and it is dead quiet before the person starts talking there is that hiss noise. If I knew how to turn AGC off that would probably help a great deal.