Arri Alexa 65 6K Camera

[singhcr]

Originally Posted by Penton-Man

Brain challenge:

The size difference between a 35mm/4perf Academy frame (22mm. wide) and a 65mm/5perf frame results in a x% increase in resolution for the 65.

x = what?

35mm film has an aspect ratio of 1.37:1 for an Academy frame.

x=1.37y
x=22mm -> y=(22mm/1.37)= 16.05mm. y= 4 perfs, 1 perf=(16.05mm/4)= 4.013mm
Total negative area= 22mm * 16.05mm= 353.1 square mm.

65mm film has an AR of 2.20:1.

x=2.20y
y= 5 perfs
x=2.20(5*4.013mm), -> x=44.138mm.
y= 44.138/2.2=20.062mm
Total negative area= 44.138 mm * 20.062mm = 885.5 square mm.

Difference= 885.5- 353.1=532.4
% increase= (532.4/353.1)*100=150.8%