Camera

Posted on by

Back to Camera...

360 shutter angle when 48 FPS? (2 replies and 7 comments)

Limbo
2 months ago
Limbo 2 months ago

Hi friends,

Here is a silly question. When shooting at 48 FPS, is it more natural to dial the shutter angle to 360 instead of 180, since it's the same amount of motion blur as 24FPS with 180 shutter angle?

dmullenasc
2 months ago
dmullenasc 2 months ago

No, it is more common to use a 180 degree shutter angle for slow-motion.

Limbo
2 months ago
Limbo 2 months ago

Thank you, David!

If it's for a platform that just plays at 48 FPS instead of using the footage for slow motion(like the Lord of the Rings), is it the same case?

dmullenasc
2 months ago

Yes

dmullenasc
2 months ago

“The Hobbit” — because of the 1-stop loss from shooting at 48 fps and the additional 1-stop loss from the 3D mirror rig, compromised by using a 270 degree shutter instead of a 180 degree shutter. If you watch the movie, fast action has a bit more smear/blur to it than is typical. You can decide for yourself if that’s OK.

dmullenasc
2 months ago

“The Hobbit” also used 270 degrees because their 24 FPS extraction was just going to skip every other frame, so the 270 degree look at 48 FPS would look more like 24 FPS shot at something like 144 degree shutter angle (as opposed to looking like a 90 degree shutter angle if they had shot 48 FPS with a 180 degree shutter angle.) so you won’t see the motion smeariness in the 24 FPS blu-ray, you’d only have seen it if you had seen the 48 FPS version.

Limbo
2 months ago

Does the smeariness come from the lack of "gap" between frames?

dmullenasc
2 months ago

No simply longer shutter time

Limbo
2 months ago

I think I might understand. It's not about how much shutter time per frame but the shutter time per second.

dmullenasc
1 month ago

It’s about how it looks at the intended projection speed.

Back to Camera...