Sensor Size, Crop Factor and Focal Length

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Avidil Ryeson

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Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 2:59 am

Enjoy!

Horizontal Measurements
Image

Diagonal Measurements
Image
Last edited by Avidil Ryeson on Thu Oct 17, 2013 8:57 am, edited 3 times in total.
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Eli B. Michaud

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 3:34 am

Really helpful thanks. But on the 40mm of the BMPCC it says 15.36mm when it should be 115.2mm right? otherwise great job.
Eli B. Michaud
Director, Cinematographer, Writer, Camera Operator
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Avidil Ryeson

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 3:38 am

MaulKentor wrote:Really helpful thanks. But on the 40mm of the BMPCC it says 15.36mm when it should be 115.2mm right? otherwise great job.

my mistake )
fixed it.
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christiangruner

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 7:31 am

These are diagonal measurements, right?
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Avidil Ryeson

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 7:51 am

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christiangruner

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 8:19 am

Ryeson wrote:
christiangruner wrote:These are diagonal measurements, right?


http://www.seriouscompacts.com/showthread.php?t=11338
http://www.dpreview.com/forums/post/42147887



So "Yes" ;)

I find that using the the diagonals when comparing 3:4/3:2 sensors with 16:9 sensors are not really exact.

Instead one should primarily concentrate on the horizontal FOV when talking about 16:9 sensors. That makes a lot more sense in the real world.
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Avidil Ryeson

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Re: Sensor Size, Crop Factor and Focal Length

PostThu Oct 17, 2013 9:05 am

christiangruner wrote:
Ryeson wrote:
christiangruner wrote:These are diagonal measurements, right?


http://www.seriouscompacts.com/showthread.php?t=11338
http://www.dpreview.com/forums/post/42147887



So "Yes" ;)

I find that using the the diagonals when comparing 3:4/3:2 sensors with 16:9 sensors are not really exact.

Instead one should primarily concentrate on the horizontal FOV when talking about 16:9 sensors. That makes a lot more sense in the real world.


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