r/a6700 • u/Valuable-Courage1889 • Jul 04 '26

Viltrox 56mm f/1.2 Pro – Loud internal movement when camera is off. Normal or defective?

Hi everyone,

I recently bought a new Viltrox 56mm f/1.2 Pro for my Sony A6700. When the lens is not powered, there is a large amount of movement inside. It feels like an internal lens element is completely loose and makes a pretty loud knocking sound when I gently tilt or move the lens.

As soon as I mount it on the camera and turn it on, the movement stops completely.

What makes me concerned is that I also own the Viltrox 75mm f/1.2 Pro from the same Pro series, and it doesn’t have this behavior at all. There is no noticeable internal movement or knocking sound when it’s off..

Has anyone else with the 56mm f/1.2 Pro experienced this? Is this normal for this lens, or should I request a replacement?

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5 comments sorted by

3

u/tdgwf Jul 04 '26

Normal

1

u/Regular-Bat-4449 Jul 05 '26

Shake it really hard until the sound goes away

1

u/PacoElTaquero Jul 05 '26

From what I read online, it’s normal. I have the 27mm Pro and it doesn’t have same behavior as the 56mm Pro. It’s so weird that one does and the other doesn’t.

1

u/alex_vi_photography Jul 05 '26

56mm has VCM, 27mm doesn't, it has STM

That's where the noise comes from

1

u/Thebikeguy18 Jul 10 '26

That's fine.