GH3 autofocus problems in video with 14-140

Started Aug 19, 2013 | Discussions
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thanos Regular Member • Posts: 300
GH3 autofocus problems in video with 14-140

I'm using the GH3 for events videography with the 14-140 4.0-5.8 lens (the old one - bought as a kit with the camera) and I'm experiencing some problems with autofocus in AFC mode (example videos at the end of the post). The AF gets confused in *direct sunlight* when shooting people moving (like dancing running etc).

I'm shooting in creative video mode.

Settings:

AF mode: 23-Area

Motion picture menu: exposure mode: P, Continuous AF: ON

Custom menu: Quick AF: ON

Please don't tell me to shoot in manual focus or AFS. At this price point the least I'm expecting is reliable AF in direct sunlight.

Of the 30-40 clips shot that day 5-6 had the problem.

Video samples demonstrating the problem:

https://www.youtube.com/watch?v=FK0GIXWt_c8

https://www.youtube.com/watch?v=fGk2v1LA8G8

https://www.youtube.com/watch?v=6iApZ5m7mFw

Panasonic Lumix DMC-GH3
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G1Houston Senior Member • Posts: 2,578
It has limitations.

thanos wrote:

I'm using the GH3 for events videography with the 14-140 4.0-5.8 lens (the old one - bought as a kit with the camera) and I'm experiencing some problems with autofocus in AFC mode (example videos at the end of the post). The AF gets confused in *direct sunlight* when shooting people moving (like dancing running etc).

I'm shooting in creative video mode.

Settings:

AF mode: 23-Area

...

Please don't tell me to shoot in manual focus or AFS. At this price point the least I'm expecting is reliable AF in direct sunlight.

In 23-area AF, the camera will just focus on the object that is closest to the camera.  This can be fooled if many things come between the camera and your object of interest.

 G1Houston's gear list:G1Houston's gear list
Olympus PEN E-PL5 Nikon D7100 Olympus OM-D E-M10 II Nikon AF-S DX Nikkor 35mm f/1.8G Panasonic Lumix G 20mm F1.7 ASPH +8 more
thanos OP Regular Member • Posts: 300
Re: It has limitations.

G1Houston wrote:


In 23-area AF, the camera will just focus on the object that is closest to the camera. This can be fooled if many things come between the camera and your object of interest.

I don't see anything coming btw the camera and the lens. The examples I've posted are a total failure of AF.

RickPick
RickPick Senior Member • Posts: 1,154
Re: It has limitations.

Still, try single area autofocus, you may have more success with that. You can change the size of the focus point appropriate to your subject and distance.

 RickPick's gear list:RickPick's gear list
Panasonic Lumix DMC-G1 Olympus PEN E-P1 Panasonic Lumix DMC-GH2 Panasonic Lumix DMC-GX7 Panasonic Lumix DMC-GH4 +7 more
G1Houston Senior Member • Posts: 2,578
Re: It has limitations.

RickPick wrote:

Still, try single area autofocus, you may have more success with that. You can change the size of the focus point appropriate to your subject and distance.

also make sure the lens has the latest firm ware.

 G1Houston's gear list:G1Houston's gear list
Olympus PEN E-PL5 Nikon D7100 Olympus OM-D E-M10 II Nikon AF-S DX Nikkor 35mm f/1.8G Panasonic Lumix G 20mm F1.7 ASPH +8 more
thanos OP Regular Member • Posts: 300
Re: It has limitations.

RickPick wrote:

Still, try single area autofocus, you may have more success with that. You can change the size of the focus point appropriate to your subject and distance.

Yep, tried that. It's even more unstable so I went back to 23-area.

thanos OP Regular Member • Posts: 300
Re: It has limitations.

G1Houston wrote:

RickPick wrote:

Still, try single area autofocus, you may have more success with that. You can change the size of the focus point appropriate to your subject and distance.

also make sure the lens has the latest firm ware.

I have body firmware v1.2, lens firmware v1.4. These are the latest i think.

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