Panasonic GH4 + Sigma Lens Continuous Autofocus Issue

[KUTV]

I am currently using a Panasonic GH4, Metabones Speedbooster XL 0.64x adapter with the Sigma 18-35mm f1.8 lens.

When I hit the record button, and have the continuous autofocus setting on, I notice that the Sigma lens make really loud rattling, grinding noise when it's trying to focus. It only makes this sound once I hit the record button. So I exchanged my lens for the same one, and noticed that the new one did the same thing. So I was thinking it may have been the Metabones adapter, but tried it with another one and still made that loud noise.

Is anyone experiencing this problem? Perhaps, I'm doing something wrong.

Let me know! Thanks...

 

[KUTV]

I am currently using a Panasonic GH4, Metabones Speedbooster XL 0.64x adapter with the Sigma 18-35mm f1.8 lens.

When I hit the record button, and have the continuous autofocus setting on, I notice that the Sigma lens make really loud rattling, grinding noise when it's trying to focus. It only makes this sound once I hit the record button. So I exchanged my lens for the same one, and noticed that the new one did the same thing. So I was thinking it may have been the Metabones adapter, but tried it with another one and still made that loud noise.

Is anyone experiencing this problem? Perhaps, I'm doing something wrong.

Let me know! Thanks...

does anyone have this problem?

 

[ETron99]

Hi,

I have the exact same set up and issue. Were you able to resolve this problem?

Thank you!!

 

[john isaacs]

Hi,

I have the exact same set up and issue. Were you able to resolve this problem?

Thank you!!

Don't use CAF. Get a large monitor with focus peaking and focus manually.