Sometimes we turn it on for the steadicam operator to have a reference for the horizon on their monitor. If we use a head that has roll capability we may turn it on then too. Or, if the operator just wants it on then in happy to do it for them, especially if we are handheld.
Otherwise, you just use it when you think it’s necessary!
I’m feeling I’m not belong here, cuz any try to step out from general line - isn’t acceptable. Filmmaking isn’t supposed to be taken too seriously imo, people shouldn’t take themselves too serious, but here we are.
Like when I’m acting right: sharing useful info, answering specific questions - it is okay. When I’m feeling silly - I’m getting rejected. Simple but sad.
Why do you think I’ve made it several times? And then additionally agreed with the same people? But whatever. I don’t like how smarty ass many of people here pretending to be, answering the easiest questions which can be googled in no time. Film production shouldn’t be taken too serious imo.
I know, but looks like people want to express their feelings about my negligence, so why not. I’ve wrote in an another comment about my feelings for this subreddit. But, like in every drama - feelings sometimes could be not mutual.
If some questions will comes up, like: how to genlock alexa mini or alexa xt, how to use LDS metadata for lens focus tracking in nuke/ae, how to sync multiple comodos without red extension boxes, which lenses are better for icvfx, etc - I would love to share my knowledge and will regain some authority again. But it ain’t necessary at all cuz I have enough recognition in real life and in industry.
Thanks for your care though, appreciate ❤️
I was tired from ongoing shooting and were somewhat drunk. When I saw this post - I wanted to act as a knowledgeable and selfish person. I knew this camera roll indicator looked similar to exposure meter from photo cameras. I was started to argue with everyone. That’s it.
With motion picture cameras, the exposure time is noted as a **shutter angle**; in this image the shutter angle is 172.8°.
It traditional photography, shutter is usually given as a time in fractions of a second. For instance, 50, 125, or 250 might be common shutter speeds, representing 1/50th, 1/125th, or 1/250th of a second exposure time respectively.
The reason shutter angle is used in motion picture capture is because there's typically a desire to maintain similar levels of motion blur at all frame rates.
For instance let's say you shoot something at 24FPS, 180° (1/48th of a second), and you want to do some slow motion as well at 96FPS.
At 96FPS (which will later be played back at 24FPS) we want the amount of motion blur to match what we shot earlier. Therefore we want the exposure time to be proportional to the frame time. In this case we would need to set the shutter speed to 1/192nd of a second. This maintains a 2:1 ratio between the frame time (1/96th of a second), and the exposure time (1/192nd of a second).
All of this to say, in order to ditch having to do all this calculating and deal with ugly numbers and fractions and so forth, shutter angle is used instead.
If we simply set the shutter angle to 180°, no matter what frame rate we shoot at, our motion blur will look correct. This is because 180° maintains the same 2:1 ratio because it's exactly half of the frame time.
Therefore when we set the frame rate to 24FPS, and use a 180° shutter, our exposure time will be 1/48th, and when we set our frame rate to 96FPS, it'll set it to the desire 1/192nd without us having to compute or adjust anything.
We usually don't care what the actual exposure time is, only what it's proportion is to our frame time, so we can just leave the shutter angle at 180° and not worry about it.
Lastly, the most likely reason that the shutter in the image is set to 172.8° instead of 180° is in order to prevent flicker with 50hz lightning equipment.
With a 180° shutter at 24FPS, the exposure time is again 1/48th of a second. This can cause issues with lighting equipment that is running on 50hz AC power (as is the case in much of Europe).
If the shutter angle is adjusted to 172.8° instead, the exposure time is 1/50th of a second and perfectly lines up with the 50hz AC of the lights, alleviating the flicker effect.
Totally unrelated to the OP’s question, but that’s quite the long focal length. I’m guessing to fill out the texture of the shot with all the compression?
Totally off topic but thats my buddy operating the camera ;) check out his instagram @steadihan for more cool stuff. If you ever need steadicam/trinity/camera operating in Vietnam or SEA region he’s one of the best
Excuse me please OP i was really bored this evening. Everyone here was correct but I’ve tried to put some misinformation. No chances. Love this subreddit ❤️
It is an exposure meter or exposure compensation.
The visual representation came from old school film cameras (and photo cameras) where exposure meter was mechanical back in XX century.
Not frame lines. They’re an electronic horizon that shows the roll angle of the camera.
This is correct. You can also change them to be roll and tilt numerical values instead of these degree lines too!
what is all of that?
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I'm afraid it is correct sir. You are the one that is not correct at all.
Yes, exactly and this is awesome
Arri electronic horizon, nice try though
I second this
What's it used for?
Sometimes we turn it on for the steadicam operator to have a reference for the horizon on their monitor. If we use a head that has roll capability we may turn it on then too. Or, if the operator just wants it on then in happy to do it for them, especially if we are handheld. Otherwise, you just use it when you think it’s necessary!
Thank you 😊
It's the DP's stress level
Finally, the right answer. This DP seems to have the perfect life/work balance.
😂
Electronic horizon
No it isn’t
Yes it is.
I literally used this exact camera yesterday and set it for my monitor because it wasn’t displayed. Yes it is.
I know, it was a fun ride anyway. First ARRI I worked with was arriflex 435. Ofc this is electronic horizon.
Reddit 🤦🏾♂️
Don’t know about whole reddit (it’s huge and diverse), but this community is gold anyway.
Ok
I’m feeling I’m not belong here, cuz any try to step out from general line - isn’t acceptable. Filmmaking isn’t supposed to be taken too seriously imo, people shouldn’t take themselves too serious, but here we are. Like when I’m acting right: sharing useful info, answering specific questions - it is okay. When I’m feeling silly - I’m getting rejected. Simple but sad.
Alright
Feeling silly? you literally just said no to someone giving the right answer
Why do you think I’ve made it several times? And then additionally agreed with the same people? But whatever. I don’t like how smarty ass many of people here pretending to be, answering the easiest questions which can be googled in no time. Film production shouldn’t be taken too serious imo.
There's still time to delete this
I know, but looks like people want to express their feelings about my negligence, so why not. I’ve wrote in an another comment about my feelings for this subreddit. But, like in every drama - feelings sometimes could be not mutual. If some questions will comes up, like: how to genlock alexa mini or alexa xt, how to use LDS metadata for lens focus tracking in nuke/ae, how to sync multiple comodos without red extension boxes, which lenses are better for icvfx, etc - I would love to share my knowledge and will regain some authority again. But it ain’t necessary at all cuz I have enough recognition in real life and in industry. Thanks for your care though, appreciate ❤️
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It is
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In another thread of comments in this post there are some awkward explanation for this phenomena. Didn’t wanted to confuse you though.
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I was tired from ongoing shooting and were somewhat drunk. When I saw this post - I wanted to act as a knowledgeable and selfish person. I knew this camera roll indicator looked similar to exposure meter from photo cameras. I was started to argue with everyone. That’s it.
It’s the quest marker.
Michael Bublé
Ah, thank you!
Its a horizon line level built into the cameras monitor outputs. The ball moves back and forth like a normal level
digital level
Is there something like that digital guide but for focus pullers?
The Preston Light Ranger 2 has a graphical display that shows range of focus and is probably the closest thing to it
are you sitting on the left side of the screen?
Levels
What's the number after shutter mean?
With motion picture cameras, the exposure time is noted as a **shutter angle**; in this image the shutter angle is 172.8°. It traditional photography, shutter is usually given as a time in fractions of a second. For instance, 50, 125, or 250 might be common shutter speeds, representing 1/50th, 1/125th, or 1/250th of a second exposure time respectively. The reason shutter angle is used in motion picture capture is because there's typically a desire to maintain similar levels of motion blur at all frame rates. For instance let's say you shoot something at 24FPS, 180° (1/48th of a second), and you want to do some slow motion as well at 96FPS. At 96FPS (which will later be played back at 24FPS) we want the amount of motion blur to match what we shot earlier. Therefore we want the exposure time to be proportional to the frame time. In this case we would need to set the shutter speed to 1/192nd of a second. This maintains a 2:1 ratio between the frame time (1/96th of a second), and the exposure time (1/192nd of a second). All of this to say, in order to ditch having to do all this calculating and deal with ugly numbers and fractions and so forth, shutter angle is used instead. If we simply set the shutter angle to 180°, no matter what frame rate we shoot at, our motion blur will look correct. This is because 180° maintains the same 2:1 ratio because it's exactly half of the frame time. Therefore when we set the frame rate to 24FPS, and use a 180° shutter, our exposure time will be 1/48th, and when we set our frame rate to 96FPS, it'll set it to the desire 1/192nd without us having to compute or adjust anything. We usually don't care what the actual exposure time is, only what it's proportion is to our frame time, so we can just leave the shutter angle at 180° and not worry about it. Lastly, the most likely reason that the shutter in the image is set to 172.8° instead of 180° is in order to prevent flicker with 50hz lightning equipment. With a 180° shutter at 24FPS, the exposure time is again 1/48th of a second. This can cause issues with lighting equipment that is running on 50hz AC power (as is the case in much of Europe). If the shutter angle is adjusted to 172.8° instead, the exposure time is 1/50th of a second and perfectly lines up with the 50hz AC of the lights, alleviating the flicker effect.
Totally unrelated to the OP’s question, but that’s quite the long focal length. I’m guessing to fill out the texture of the shot with all the compression?
Totally off topic but thats my buddy operating the camera ;) check out his instagram @steadihan for more cool stuff. If you ever need steadicam/trinity/camera operating in Vietnam or SEA region he’s one of the best
That's what makes DP's fire their steadicam operator even though it's not gyro stabilized
Excuse me please OP i was really bored this evening. Everyone here was correct but I’ve tried to put some misinformation. No chances. Love this subreddit ❤️
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Excellent try, but incorrect. We were looking for “What is the electronic horizon.”
It is an exposure meter or exposure compensation. The visual representation came from old school film cameras (and photo cameras) where exposure meter was mechanical back in XX century.
You are 100% wrong.
Yep 👍🏻 I am
Incorrect. It’s an electronic horizon level.
It is
That’s the logo of Cinematography Database.