Boring technical stuff:
Exposure Time: By; Samuelson
The formula for computing the exposure time for film cameras with
rotating shutters hasn't changed,
and it doesn't matter if you are 24 or 25 frame based ;o)
Exposure time (seconds) = shutter angle in degrees / (over) 360 degrees
X (times) 1 / (over) frame rate (fps).
thus for a shutter set at 180 degrees filming at 1 fps: 180/360 or 180
over 360 X 1/1 or 1 over 1 = 1/2 second.
SHUTTER SPEED: By; Sean Fairburn
Shutter Speed = Shutter Angle
When using a 23.98 or 24Psf Base
ECS =Shutter° Angle Stop Gain or Loss
1/24th =360° Wide Open +1
1/30th =315° Qtr Stop +3/4
1/36th =270° Half Stop +1/2
1/42nd =225° Qtr Stop +1/4
1/48th =180° One Stop BASE
1/72th =135° Half Stop -1/2
1/96th =90° One Stop -1
1/144th =67.5° Half Stop -1.5
1/192th =45° One Stop -2
1/288th =33.75° Half Stop -2.5
1/384th =22.5° One Stop -3
1/576th =17° Half Stop -3.5
1/768th =11° One Stop -4
1/1152th =8.5° Half Stop -4.5
1/1536th =5.5° One Stop -5
1/2200th =4.25° Half Stop -5.5
35mm vs. 2/3 CCD field of View
By: Glenn Przyborski