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Lumix GH5 problem when in manual

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Knopfler91

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Hello boys and girls,

I recently purchased my first ever camera; the Panasonic Lumix GH5. I've stumbled upon a problem which makes me wonder if there is something wrong with my camera. Whenever I'm in video-mode and set my exposure to manual (M), the display screen ends up being really slow. It's almost as if the framerate on my display screen drops to 0, if that makes sense. It's like playing a videogame on an old computer. Has anyone encountered a problem like this before?

Thanks.
 
Sounds like you're in a low light situation with a slow shutter speed with the display updating accordingly.
 
Check your exposure settings. Is the shutter speed really slow?
 
Aye, I was indeed inside a rather dark room. I gotta say; working with these camera's is pretty new for me. I only just learned about the exposure triangle. I noticed whenever I change the shutter speed (lowering the number) to 25 in a well light room, the framerate drops. If I change the shutter speed in videomode to 40, I also notice the frames start dipping.

So is this a normal thing to happen?
 
Knopfler91 said:
Mark9473 said:
Check your exposure settings. Is the shutter speed really slow?
Click to expand...
When I set the shutter speed to 40 in videomode in a well light room, the frames start dropping. Is 40 considered to be slow? I'm a bit of a newbie.
Click to expand...
If you're recording video at e.g. 60 frames per second, the theoretical slowest shutter speed is 1/60th of a second - in practice possibly a bit less for whatever the camera needs to do in between two frames. The camera cannot fit 60 frames of 1/40s into one second.

Whether or not that results in dropped frames in the recorded video, depends on the camera software i.e. what has it been told to do when the user is asking an impossible task (fitting 1.5 seconds worth of video into 1.0 second of time).

Is that what's going on?

I thought your original question related to slow image refreshing in the EVF. That would depend on the shutter speed when you're in M. I'm not sure how the EVF refreshment rate interacts with the shutter speed.

--
Mark
 
Last edited:
normally when we shoot in live view (video or still), the camera will simulate the image from the sensor output, that besides the combined effect of f/stop, shutter speed and ISO to determine the brightness, it would also upon the f/stop in used, simulate the background blur condition, the noise condition upon the ISO in used, and of course the shutter speed effect (e.g. a slow shutter speed to shoot some fast moving thing or panning fast)... The laggy live view is a reminder on possible compromise on stability.

I do not shoot video a lot. The live view under M mode (still shooting, Constant Preview=on) would become very laggy (a reduced refresh rate of the live view simulation update) when I was close to 0.5" ~1" or slower shutter speed. 1/25" or 1/50" generally won't cause noticeable effect on the refresh rate.

What else setting had you used?
 
alcelc said:
normally when we shoot in live view (video or still), the camera will simulate the image from the sensor output, that besides the combined effect of f/stop, shutter speed and ISO to determine the brightness, it would also upon the f/stop in used, simulate the background blur condition, the noise condition upon the ISO in used, and of course the shutter speed effect (e.g. a slow shutter speed to shoot some fast moving thing or panning fast)... The laggy live view is a reminder on possible compromise on stability.

I do not shoot video a lot. The live view under M mode (still shooting, Constant Preview=on) would become very laggy (a reduced refresh rate of the live view simulation update) when I was close to 0.5" ~1" or slower shutter speed. 1/25" or 1/50" generally won't cause noticeable effect on the refresh rate.

What else setting had you used?
Click to expand...
 
Mark9473 said:
Knopfler91 said:
Mark9473 said:
Check your exposure settings. Is the shutter speed really slow?
Click to expand...
When I set the shutter speed to 40 in videomode in a well light room, the frames start dropping. Is 40 considered to be slow? I'm a bit of a newbie.
Click to expand...
If you're recording video at e.g. 60 frames per second, the theoretical slowest shutter speed is 1/60th of a second - in practice possibly a bit less for whatever the camera needs to do in between two frames. The camera cannot fit 60 frames of 1/40s into one second.

Whether or not that results in dropped frames in the recorded video, depends on the camera software i.e. what has it been told to do when the user is asking an impossible task (fitting 1.5 seconds worth of video into 1.0 second of time).

Is that what's going on?

I thought your original question related to slow image refreshing in the EVF. That would depend on the shutter speed when you're in M. I'm not sure how the EVF refreshment rate interacts with the shutter speed.

--
Mark
Click to expand...
Mark, at least with the GH3, 4, and 5 can shoot video down to 1/2 sec. under one specific set of circumstances I happened upon: Creative video mode (not just video button), M exposure, and focus lever in MF position. Works with all video formats, all frame rates. Other lowest SS is reciprocal of frame rate. See if it works with the G85/Gx85.

At 30p, 1/2 sec, there are two blocks of 15 identical frames each sec; 60p, 30 frame blocks. So it has to be cloning the original 1/2 sec exposure on-the-fly. Great for static night shots (4-stops ISO gain) or blurring whirling dancers.

Pete
 
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