Author Topic: Cinema wide aspect crop question  (Read 486 times)

ItsMeLenny

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Cinema wide aspect crop question
« on: August 19, 2019, 10:41:53 AM »
A question for anybody who has the correct answer; :P

When I see behind the scenes stuff for movies, they have their 16:9 monitor with multiple crop marks, but for the "cinema wide" crop mark (greater than 2:1 (the 2.39:1 or what not)) it is never positioned at the centre vertically...
Why?

ArcziPL

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Re: Cinema wide aspect crop question
« Reply #1 on: August 19, 2019, 02:22:19 PM »
I would guess it has something to do with the composition. Example: the horizon should normally not be placed ideally in the middle of the frame but rather 1/3 or 2/3 of its height (or maybe golden ratio). To satisfy this rule for all formats, it requires matching the position of 1/3 of their height, not their centers.
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yokashin

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Re: Cinema wide aspect crop question
« Reply #2 on: August 19, 2019, 03:08:01 PM »
Probably because the material is created one camera for various later playback formats...


ItsMeLenny

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Re: Cinema wide aspect crop question
« Reply #3 on: August 19, 2019, 04:20:10 PM »
Probably because the material is created one camera for various later playback formats...

This argues for why it shouldn't be placed there, those crops happen in the centre.

ItsMeLenny

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Re: Cinema wide aspect crop question
« Reply #4 on: August 19, 2019, 04:20:54 PM »
I would guess it has something to do with the composition. Example: the horizon should normally not be placed ideally in the middle of the frame but rather 1/3 or 2/3 of its height (or maybe golden ratio). To satisfy this rule for all formats, it requires matching the position of 1/3 of their height, not their centers.

Ok, but why not frame the shot so that it is 1/3 or 2/3 the way down, instead of cropping off centre for uneven lens distortion.

timbytheriver

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Re: Cinema wide aspect crop question
« Reply #5 on: August 19, 2019, 04:23:55 PM »
I'd ask a DP for a definitive answer:

https://cinematography.com/index.php?/forum/4-lighting/

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ItsMeLenny

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Re: Cinema wide aspect crop question
« Reply #6 on: August 20, 2019, 06:46:24 AM »
After pondering on the first response and the image from the second response and combining the two responses :P I think i can see whats going on now.