Anamorphic Field of View Test

[mevans]

hi all-

 

first time posting. thought you guys might be interested in a field of view comparative test i shot between the red one and 5d mk iii using the same zeiss ZE 35mm and my LA-7200/Kenko 103mm +.3 diopter.  I had heard from a colleague that shooting anamorphic on the Red didn't offer a field of view enhancement because the super35 1.78 sized chip didn't use all the image area offered by the squeeze.  The results showed differently!

 

https://vimeo.com/63418209

[Julian]

That colleague of yours is talking bollocks. The super35mm sensor doesn't use all the image area offered by the Zeiss (as you can see in your comparison with the fullframe 5D), but adding an anamorphic gives you a wider field of view, no matter the sensor size.

[Tito Ferradans]

I think what your friend said is: if you choose ANAMORPHIC (ANA) mode on the RED, it really won't use the full sensor area. It uses just a square (4:3) in the middle of the sensor. For preview, it de-stretches directly in camera, for 2x lenses. This creates an image with 2.4:1 aspect ratio, popularly known as Cinemascope. But, since you weren't using a 2x lens, but a 1.33x, you're comparing a full sensor (16:9) image against a 4:3 crop from the center with 1.33x stretch, and that indeed, has no field of view enhancement. (4:3 de-stretched to 1.33 results in a 16:9 image)

 

If you shoot it without activating ANA mode, it will use the full sensor, and you can de-stretch in post, to whichever ratio you want (as 1.33, for the LA7200), so, your 16:9 x 1.33 goes Cinemascope, while most 2x stretch lenses would vignette. :P

 

(it got a bit confusing, please ask if you missed something!)

EDIT
About the sensor size, the RED One has a 35mm sensor, while the 5d3 has a full frame sensor, so, that's almost 40% wider field of view on the 5D, which is what we see in the video!

[dahlfors]

EDIT
About the sensor size, the RED One has a 35mm sensor, while the 5d3 has a full frame sensor, so, that's almost 40% wider field of view on the 5D, which is what we see in the video!

 

You mean: RED One has a S35 sensor, while the 5d3 has a full frame 35mm sensor :)

Comparison image here: http://www.eoshd.com/wp-content/uploads/2011/08/sensor-comparison3.jpg

 

And regarding original poster:

 

Yes, anamorphic lenses are made to squeeze the image as much over the whole lens. This means - even if you just use the center area of the anamorphic, it will squeeze in the image there as well - which you confirmed with your test.

 

That the RED One S35mm sensor is smaller than a full frame sensor results in, means that you can use a wider taking lens than on the full frame 5Dmk3 without getting vignetting.