GH3 GH3 1/48 shutter @ 24p?

PopcornFlix

PopcornFlix

Well-known member
I keep asking this question, and nobody seems to know the answer.

Can anyone tell me definitively whether the GH3 can shoot with a 1/48 shutter at 24p?

This is the standard "180 degree shutter" used on movie cameras. Most digital video cameras do 1/48 @ 24p, but to my shock, the GH2 only does 1/40 and 1/50.

Does the GH3 do 1/48 @ 24p?


Thanks in advance for the answer!
 
PopcornFlix said:
I keep asking this question, and nobody seems to know the answer.

Can anyone tell me definitively whether the GH3 can shoot with a 1/48 shutter at 24p?

This is the standard "180 degree shutter" used on movie cameras. Most digital video cameras do 1/48 @ 24p, but to my shock, the GH2 only does 1/40 and 1/50.

Does the GH3 do 1/48 @ 24p?


Thanks in advance for the answer!
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I haven't seen anything that has said it doesn't have 1/48, so we will have to wait and see.

lpowell said:
No, it doesn't have a 1/48-sec shutter speed, and it doesn't record at 24p either.

If you must be that precise, the GH3 will record with a 1/50-sec shutter at 23.976p.
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The specs say it is 24fps, not 23.976fps.
 
Import any GH2 "24p" footage into a program and look at the framerate.. you'll see its 23.976, not 24. Same thing.
 
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Anybody that can tell the difference between 1/48th and 1/50th is a freak of nature with superhero like vision.

In the video world 24p is always 23.976. That is the NTSC form of 24p and how almost every 24p camera functions except for the extreme priced 24p cameras like RED. Even then RED has the option of shooting both. While it is possible the GH3 could add a true 24p frame rate this should not take the place of the standard 23.976. Outside of a film transfer I see very little use for true 24p when it is so easy to convert 23.976 to 24p if you really need it.

Keep in mind some of Panasonic's video cameras also only use 1/50th when shooting 24p such as the HMC-40 and HMC-150.
 
Thomas Smet said:
Keep in mind some of Panasonic's video cameras also only use 1/50th when shooting 24p such as the HMC-40 and HMC-150.
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Just a point of clarification, but the HMC40 most definitely can shoot with a 1/48th shutter...or 1/40th, or 1/45.5 if you so choose. If you use syncro-scan mode you can have practically any shutter speed you could want. I don't have an HMC-150, but I believe that it's the same way on that cam. 1/40th seems to be the sweet spot for 24p on the HMC40. 1/48 or 1/50 looks a little stuttery to me, but ymmv.
 
Thomas Smet said:
Anybody that can tell the difference between 1/48th and 1/50th is a freak of nature with superhero like vision.
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=[ I'm not a freak of nature... but I can tell. LoL

Not in response to THomas -- For the rude comments: civility, please.
 
PopcornFlix said:
I keep asking this question, and nobody seems to know the answer.

Can anyone tell me definitively whether the GH3 can shoot with a 1/48 shutter at 24p?

This is the standard "180 degree shutter" used on movie cameras. Most digital video cameras do 1/48 @ 24p, but to my shock, the GH2 only does 1/40 and 1/50.

Does the GH3 do 1/48 @ 24p?


Thanks in advance for the answer!
Click to expand...

The 180 degree shutter was a rotating mechanical disk with half or 180 degrees cutout to expose the film. Then the opaque part of the disk covered the film while the next frame was pulled into position in the film gate. At 24fps 1/48th second was the shutter speed you "got" with each rotation of the disk.

This was with early film cameras. Later gear had a variable angle shutter, a 90 degree "opening" resulted in a shutter speed of 1/96th second, the opening could be closed further for faster shutter speeds but the frame rate stayed at 24fps for a long time.

With our digital SLRs that do video there is no mechanical shutter operating in video mode, the sensor is scanned so the old 180 degree shutter concept does not apply. The difference in motion blur rendition between 1/48th and 1/50th is so slight it would be negligible.

So the GH3 will likely not have a specific 1/48th second shutter speed. There's just no need for it anymore.
 
lpowell said:
@PopcornFlix @atarijedi

Please don't test my patience, I'm trying to be polite!
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Don't get this response. I just asked for the source of your info, since you seem to be the only person who knows. BTW, how did you know? Have you used the camera?
 
Bruce Foreman said:
The 180 degree shutter was a rotating mechanical disk.....This was with early film cameras.....With our digital SLRs ....the old 180 degree shutter concept does not apply. The difference in motion blur rendition between 1/48th and 1/50th is so slight it would be negligible.

So the GH3 will likely not have a specific 1/48th second shutter speed. There's just no need for it anymore.
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Bruce: yes, I know the history of cinema cameras.

I disagree with your aesthetic analysis. I find that the motion blur rendered by a 180-degree shutter is unique and more desireable than that of a 172.8 degree shutter. The GH2 is one of the very few digital cameras that will shoot at 24p but not at 1/48, since that combination renders a recognizeable "film look" to the video footage.

Different people have different levels of visual acuity, and different artistic tastes. Allow me to enjoy mine.

The only information I asked for was whether the GH3 could shoot 24p @ 1/48 aka 180 degree shutter.

I'd appreciate any additional data points on that question, please.

Thanks!
 
I haven't been able to notice off the bat, but when presented with examples of 1/48 1/50 and 1/60 I notice differences, mostly when I move the camera. I lean toward 1/50 coz i don't have access to DC lights all the time, and when i shoot 1/48 my PAL land lights flicker. I see a huge difference between 1/50 and 1/60andhigher @25p. I don't notice any difference between 24 and 25. Maybe I will someday. My preferred shooting mode is 25p @ 1/50. I've shot film at 180deg and it feels much like 25p 1/50. However I shot with a 5DII way back when at 30p 1/60 and that didn't feel like 25p 1/50 or 24 1/48 at all...

Dunno what to conclude, just some observations over time... been shooting for about 5 years now, so still a newbie.
 
Wesley Byram said:
Just a point of clarification, but the HMC40 most definitely can shoot with a 1/48th shutter...or 1/40th, or 1/45.5 if you so choose. If you use syncro-scan mode you can have practically any shutter speed you could want. I don't have an HMC-150, but I believe that it's the same way on that cam. 1/40th seems to be the sweet spot for 24p on the HMC40. 1/48 or 1/50 looks a little stuttery to me, but ymmv.
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Yes that is correct but that was not the intended use of the camera when shooting 24p. I personally dialed in 1/40th when I still had my HMC-40 but I know a lot of people who use the normal shutter of 1/50th with that camera. Perhaps it would be nice if the GH3 could also dial in a custom shutter for those that really do prefer 1/48th.
 
greymog said:
I haven't been able to notice off the bat, but when presented with examples of 1/48 1/50 and 1/60 I notice differences, mostly when I move the camera. I lean toward 1/50 coz i don't have access to DC lights all the time, and when i shoot 1/48 my PAL land lights flicker. I see a huge difference between 1/50 and 1/60andhigher @25p. I don't notice any difference between 24 and 25. Maybe I will someday. My preferred shooting mode is 25p @ 1/50. I've shot film at 180deg and it feels much like 25p 1/50. However I shot with a 5DII way back when at 30p 1/60 and that didn't feel like 25p 1/50 or 24 1/48 at all...

Dunno what to conclude, just some observations over time... been shooting for about 5 years now, so still a newbie.
Click to expand...

I was reading over the specs from the Panasonic website, and it seems to indicate there is some sort of flicker reduction system in the camera, for lighting I would assume, since it is set at 1/50, 1/60, 1/100, and 1/120.
 
We seem to be lacking a term for the temporal equivalent of 'pixel peeping' - let's coin one!
 
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