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Mendes Nabil
08-03-2014, 05:16 AM
Hello all, how are you?

When you look at the specification of the Red scarlet Dragon (and epic too), we see a debit difference between "full frame" and 2:4:1 ration (48fps in full frame, 60fps in 2:4:1),
what does this "full frame" really means compared to a real full frame sensor? What is 2:4:1 and how does it compare with "full frame" and 4,5kws from Mx (i know it's an old format but that's the only one i know as i own a Red Mx)..


thanks for you answer all, i can't wait to upgrade my Mx to Scarlet dragon..

Mendes Nabil
08-03-2014, 05:34 AM
I've found a part of my answer here: https://support.red.com/entries/25841176-What-are-the-RED-DRAGON-sensor-crop-factors-

It still doesn't say what is the crop factor of 2:4:1 ..

Bob Gundu
08-03-2014, 07:14 AM
The full frame on the red camera refers to using the entire sensor. But if you want to see crop factors compared to 35mm still cameras, check out www.RED.com/tools.

Jeff Kilgroe
08-03-2014, 07:28 AM
"Full frame" refers to the full sensor area of the Dragon (or whichever camera we are referencing). People often confuse this terminology with "35mm full frame," as that has become the common reference benchmark amongst DSLR cameras which use the entire (or most of) the 35mm 36x24mm film area. But "full frame" is terminology used across all camera systems with variable image frame sizes.

The Dragon sensor has a pixel resolution of 6144x3160 and each pixel is square with dimensions of 5um, that's microns or 0.005mm. So the sensor is 30.72mm x 15.8mm and has an aspect ratio of 1.94:1.

2.4:1 would be a pixel resolution of 6144x2560, which is 30.72mm x 12.8mm

If you are getting to 2.4:1 via anamorphic lenses, then this all changes and it depends on whether you're using 1.3X or 2X anamorphic lenses and there are 2X anamorphic modes in the camera.

Not sure which crop factor you are looking for here.

More info on Dragon here:
http://www.reduser.net/forum/showthread.php?92999-Red-Dragon-Info-and-Data-Sheets

Mendes Nabil
08-03-2014, 08:34 AM
Thanks for this detailed answer Jeff, i really appreciate, and it helps a lot ..

And thanks Bob, the Red tool is great!