December 19, 2014, 02:40:44 AM

Author Topic: 5Diii vs Sony A7s vs GH4  (Read 6454 times)

sanjosedave

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Re: 5Diii vs Sony A7s vs GH4
« Reply #30 on: August 08, 2014, 04:57:08 PM »
I'd like to see capture video, say, of a baseball game during the day, perhaps as the pitcher throws the ball and the batter gets ready to hit, and then pull a frame from the 4k video and present the still. Thx


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Re: 5Diii vs Sony A7s vs GH4
« Reply #30 on: August 08, 2014, 04:57:08 PM »

scyrene

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Re: 5Diii vs Sony A7s vs GH4
« Reply #31 on: August 08, 2014, 05:09:56 PM »
I'd like to see capture video, say, of a baseball game during the day, perhaps as the pitcher throws the ball and the batter gets ready to hit, and then pull a frame from the 4k video and present the still. Thx

Remember, whatever the resolution, video frames tend to be much longer exposures than stills for moving subjects. So at 30fps, you might have 1/50 for each frame. The ball would likely be a blur in every single frame, so not much use as an alternative to short exposure stills.
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StudentOfLight

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Re: 5Diii vs Sony A7s vs GH4
« Reply #32 on: August 08, 2014, 06:16:32 PM »
I'd like to see capture video, say, of a baseball game during the day, perhaps as the pitcher throws the ball and the batter gets ready to hit, and then pull a frame from the 4k video and present the still. Thx

Remember, whatever the resolution, video frames tend to be much longer exposures than stills for moving subjects. So at 30fps, you might have 1/50 for each frame. The ball would likely be a blur in every single frame, so not much use as an alternative to short exposure stills.
+1, For smooth video playback the shutter speed is typically selected as 2x faster than the fps so as to allow for enough blur in each frame for them to flow into the next. If you use an excessively high shutter speed then the individual frames would be sharper but the gap between exposures would be relatively long, so there could be a "big" difference from frame to frame resulting in a jerky/staccato feel to the playback.
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Re: 5Diii vs Sony A7s vs GH4
« Reply #32 on: August 08, 2014, 06:16:32 PM »