Here are two easy calculators to help you convert shutter angle to shutter speed or the other way around.
Shutter Speed to Shutter Angle Calculator
Shutter Angle to Shutter Speed Calculator
Why do you need this?
First off, the “film look” isn’t just a 180-degree shutter angle. This is an old wives tale and you really need to get this out of your head. It’s a different story when you are dealing with slow motion, but the shutter angle is just shutter speed as it relates to the frames per second.
At 60fps a 180-degree shutter angle will not look cinematic even remotely. Even if you slow it back down to 30fps, each individual frame was still exposed to a 1/120 shutter. 1/120 motion blur.
What makes the film look is a motion blur, frames per second too, but mostly motion blur. Get your shutter speed close to 1/48.
If you’re shooting at 30fps and still want that film motion blur you get from the 1/48 shutter, you can shoot at 225 shutter angle.
Dealing With Different Cities Lighting
Tokyo and Japan run their networks at NTSC, however, Tokyo’s power grid and in northern Japan is 50Hz. Southern Japan south of Osaka is 60Hz. When shooting in Japan at NTSC shutter speeds, you’ll need to be conscious of your shutter angle or frames per second to so avoid flickering light.
At 30fps in Tokyo, you’ll want to be at around a 216 shutter angle. But if you go down to Fukuoka you’ll want to be at 180, or 225 if you want that 1/48 shutter.
Or if you’re shooting at 24 fps you may be able to shoot at a shutter angle of 172 to reduce flickering in Tokyo if you are still seeing it at the 180 shutter.
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