RandoThrowAway wrote:
Long-time lurker, first-time poster here. Wanted to ask the insight of owners to assess whether there is a QC issue with the Sony 24mm f1.4 GM lens in regards to autofocus and aperture.
Basically, I've tried a total of 4 lens that have seen variation in the following areas (my latest lens exhibits these characteristics the least but is still there):
1) Aperture grinding sounds. Similar actually to the Sony 55mm 1.8, upon turning on the camera, changing aperture (notably from f1.4 to f2 and then f8 to f16), you can hear a sort of grind or audible movement of the blades rubbing on each other.
2) Autofocus Motor thudding: Especially in low-light and low-contrast fields, but still in decent light as well, in AF-C and AF-S, as the focus changes, you can feel vibrational thuds along the frame of the lens.
I definitely feel that there is variation between the four lenses I've tried as the above traits varied in intensity and wanted to know if others observed the same? Thanks for your help!
You are just hearing the blades opening and closing when focusing. I would not call it grinding though. Honestly when I'm looking through the EVF I barely notice it, but yes if I put my ear to the lens you can hear it. If you have it in AFc you will notice it is quieter because the blades are not opening and closing all the way to focus. In AFs if you look in the front you will see when you focus they open wide to focus and close which is the sound your are hearing.
Not sure about "thudding". No "thudding" on mine. I mean there is a motor moving an element to focus. https://www.sony.com/electronics/camera-lenses/sel24f14gm/specifications
Dec 03, 2018 at 11:08 PM
Previous versions of nhsonyshooter's message #14682672 « Sony 24mm 1.4 GM QC Issues? -- Or Normal? Please help! »
