FS700 Slow Motion + High Shutter

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filmguy123

Veteran
Can anyone help with the math on shooting @ 120fps and 240fps on FS700? What would the shutter default to for this?

AND, if I wanted to shoot HIGH SHUTTER + 240fps... does this still make a visual difference? Example, water droplets and blood droplets in slowmotion? Martial arts/action sequences? What sort of look would it give shooting at an even higher shutter speed, and is it practical with light loss?

Finally, any big tips or differences coming from an AF100? I normally shoot on AF100 so any "adjustment" tips for the shoot this weekend would be great!

Oh - one more thing. The FS700 can't shoot at 48fps, is that correct? Only 24, 30, 60, 120, 240?
 
To get a "normal" slow motion look I take the fps number and double it. E.g. 24fps "normal" shutter speed is 1/48th so 240fps shutter speed should be 1/480th. I think that you may have to chose 1/500th but that's close enough. The fs700 as far as I remember does not default to this but rather a shutter speed of 1/240th so double check it.
As far as shooting with a higher shutter speed, yes it will give you a look and will help to freeze water droplets just like a higher shutter speed at 24fps will.
 
OK, because the guy we're using it from is confident but not neccessarily super knowledeable and he goes "oh you don't need to shoot in a higher shutter speed we don't need light, you'll see droplets at 240fps."

But I was picturing the equivalent of 1/2000th @ 240fps to shoot some cool looking slow-motion water and blood scenes. So it sounds like this will still give a much better advantage?

And will eat the same amount of light at 240fps @ 1/2000th as it would at 24fps @ 1/2000th... yeah?
 
Sorry, the above was a question...

1/2000th @ 240fps will isolate motion much better than "standard" which is 1/480th @ 240fps?
And 1/2000th @ 240fps will eat same amount of light as 1/2000th @ 24fps?
 
1/480 @ 240 will give you the same perceived motion blur as 1/48 at 24fps , so an even higher shutter speed will give you that high shutter speed crispness on water drops that you are looking for.
as for the second question, I think you are correct on this but I'd have to check. Seems logical though.
I hope that you are shooting outside, that's a lot of stop loss.
 
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Motion blur per frame is solely due to shutter speed: not related to frame rate. For example, if we shoot at 1/480 @ 240 and drop frame the footage to 24fps, the individual frames won't have much motion blur (1/480 shutter).

Shoot at the highest shutter speed you can depending on available light (and acceptable noise levels) if you want to minimize motion blur. You can always add back in simulated motion blur in post with After Effects, etc., however slomo by nature won't have much motion needing blur to look smooth and fluid.
 
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