Exact cropping dimentions for 2:40.1

[Joe Riggs]

I have 4K 16:9 footage (4096x2304), that I want to crop to 2:40.1,
would the correct dimensions to achieve that be 4096 x 1713?

 

[Björn Benckert]

Math:

4096 / 2.40 = 1706.66666

So 4096/1713= 2,39112667834209

I guess thats close enough...

however I would never use uneven numbers for frame size, some softwares cant handle that. Some quickitime applications for example. So I would actually do 4096x1706

 

[Sergei Franklin]

For theatrical it is 2.39. DCI spec for DCP scope is 4096 x 1716

 

[Joe Riggs]

Thanks, what about 3K, 2K, and 1080?

Using math and sticking to even numbers I get

3K = 3072 x 1280

2K = 2048 x 854

1080p = 1920 x 800

 

[Peter Arnold]

2k widescreen DCI specs are 2048 x 858 pixels.
There are no DCI specs for 3K.
There is no exact rule for 1080p widescreen because it is always 1920 x 1080 with bars on the top and buttom.