Shooting 60i

E

Eric Reid

Member
Noob question:

60i is shooting 60 frames per second, correct. So my question is this, is it possible to shoot in 60i to attain super smooth slo mo?
 
Eric Reid said:
Noob question:

60i is shooting 60 frames per second, correct.
Click to expand...

Not quite. It is only 60 half-frames (fields) per second.

Eric Reid said:
is it possible to shoot in 60i to attain super smooth slo mo?
Click to expand...

I wouldn't call it super smooth, but yes, you can get great slo-mo starting with 60i footage. There is a loss of vertical resolution because each field has only half the lines of a full frame, but it can still look very effective even when you slow it down a lot.

You need to select a shutter speed that is suitable for the speed of the action being filmed. Fast shutter speeds are better for high speed action, but can cause more of a strobing effect. Slower shutter speeds don't have so much strobing but you get more motion blur instead.
 
Elton, that looks great—and your choice of a 1/120 shutter is a big part of the reason, as that's what a film camera's shutter would be when shooting 60 fps.

NTSC cameras tend to default to a 1/60 shutter when shooting 60i, and that can really kill the look of slow-mo.

-Stu
 
ProLost said:
Elton, that looks great—and your choice of a 1/120 shutter is a big part of the reason, as that's what a film camera's shutter would be when shooting 60 fps.

NTSC cameras tend to default to a 1/60 shutter when shooting 60i, and that can really kill the look of slow-mo.

-Stu
Click to expand...

Thanks Stu. Yeah, 1/60 shutter for slowmo is very videoish feeling--too slurry. 1/120 is ideal for a natural motion rendition when the intent is conversion to 24p. It's the basic 180 degree shutter, but you have to properly extract the fields and conform to a progressive sequence for it to look filmlike.

btw, the clip was intentionally shot a little flat. Add a little contrast and color in the QT Player AV controls and it pops quite nicely.
 
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