Author Topic: theoretical example  (Read 2378 times)

favvomannen

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theoretical example
« on: October 23, 2012, 09:53:16 AM »
If you were to record 720p with 60frames per second and the shutter fps override to 1/12 and then in post use slowmo to get normal speed but great more f stops.

can 60fps really be recorded i720 with fps override?

favvomannen

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Re: theoretical example
« Reply #1 on: October 24, 2012, 09:48:32 AM »
Bump.

Could somebody confirm that 60p720 with shutterspeed override 1/12 will look the same (when slowed down)

as 24p720 but with better light?


is that possible with ML? (no sound though)

nanomad

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Re: theoretical example
« Reply #2 on: October 24, 2012, 10:51:07 AM »
I've got no 720p 60fps here, but why don't you try it yourself?
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

ilguercio

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Re: theoretical example
« Reply #3 on: October 24, 2012, 01:05:46 PM »
Bump.

Could somebody confirm that 60p720 with shutterspeed override 1/12 will look the same (when slowed down)

as 24p720 but with better light?


is that possible with ML? (no sound though)
How can you shoot 60 fps with 1/12s shutter?
 ???
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
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favvomannen

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Re: theoretical example
« Reply #4 on: October 24, 2012, 01:25:14 PM »
she shutter and the recorded frame is two different things. Theoretically with 1/12 shutter it should be very bright and blurry (much motion blur) but recorded with 60frames per second.

if this is not achivable 720 60frames per second and shutter override to 1 /12 then its my misstake.

When i tried it it it was no difference than 72024p and 1/12 (shutter override)

ilguercio

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Re: theoretical example
« Reply #5 on: October 24, 2012, 01:44:36 PM »
she shutter and the recorded frame is two different things. Theoretically with 1/12 shutter it should be very bright and blurry (much motion blur) but recorded with 60frames per second.

if this is not achivable 720 60frames per second and shutter override to 1 /12 then its my misstake.

When i tried it it it was no difference than 72024p and 1/12 (shutter override)
It's maths.
60 fps means that shutter speed has to be at least 1/60 or faster.
1/60*60=1 (second)
I don't see how you can expose a frame for 1/12s without having less frames (12 fps) .
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
Proud supporter of Magic Lantern.

Shizuka

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Re: theoretical example
« Reply #6 on: October 24, 2012, 02:32:31 PM »
If you were to record 720p with 60frames per second and the shutter fps override to 1/12 and then in post use slowmo to get normal speed but great more f stops.

can 60fps really be recorded i720 with fps override?

Just take 1/60 frames with 720p60 and do a five-frame temporal average. Easy to do in AVISynth.

favvomannen

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Re: theoretical example
« Reply #7 on: October 24, 2012, 03:08:23 PM »
i ment. what you see in viewfinder when 1/12 shutter speed should be able to record that i n 60p?
or that dont wokr?

nanomad

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Re: theoretical example
« Reply #8 on: October 24, 2012, 03:33:47 PM »
Again: try that by yourself, it's easy to do
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5