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Cropfactor 2.3 or 2.4 ?

https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=3964

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Cropfactor 2.3 or 2.4 ?

PostPosted: Tue Jan 08, 2013 12:47 pm
by jenson
I always read both. Wath is now the exactly cropfactor of the sensor?

Re: Cropfactor 2.3 or 2.4 ?

PostPosted: Tue Jan 08, 2013 9:50 pm
by Shawn Miller
1.6 when compared to Super 35 film...

Shawn

Re: Cropfactor 2.3 or 2.4 ?

PostPosted: Tue Jan 08, 2013 11:25 pm
by Nick Bedford
Full Frame:
36x24mm (36x20.25mm in 16:9) = 2.27x

Canon APS-C:
22.3x14.9mm (22.3x12.54mm in 16:9) = 1.41x

Here's how I might classify focal lengths on the Cinema Camera.

<11mm is extra wide.
11mm is wide.
17mm is "normal".
25mm is portrait.
35mm is starting to look telephoto.
70mm is a telephoto.
200mm is long telephoto.
1200mm is just ridiculous ;)

Re: Cropfactor 2.3 or 2.4 ?

PostPosted: Wed Jan 09, 2013 11:16 am
by Joel Crane
Nick Bedford wrote:1200mm is just ridiculous ;)

Well yes. Yes it is, Nick. :D

Re: Cropfactor 2.3 or 2.4 ?

PostPosted: Wed Jan 09, 2013 8:57 pm
by Nick Bedford
Joel Crane wrote:
Nick Bedford wrote:1200mm is just ridiculous ;)

Well yes. Yes it is, Nick. :D


Look Fred, I see the space station.

Re: Cropfactor 2.3 or 2.4 ?

PostPosted: Thu Jan 10, 2013 12:24 am
by Shawn Miller
Nick Bedford wrote:Full Frame:
36x24mm (36x20.25mm in 16:9) = 2.27x

Canon APS-C:
22.3x14.9mm (22.3x12.54mm in 16:9) = 1.41x

Here's how I might classify focal lengths on the Cinema Camera.

<11mm is extra wide.
11mm is wide.
17mm is "normal".
25mm is portrait.
35mm is starting to look telephoto.
70mm is a telephoto.
200mm is long telephoto.
1200mm is just ridiculous ;)


Fair enough, but Full Frame and APS-C are standards for stills cameras. Maybe it's more useful to refer to AbelCine's FOV comparator to understand where the BMCC sits (FOV wise) compared other film or video cameras.

http://abelcine.com/fov/

Shawn

Shawn