This you should know!!!!

D

dolph2000

Well-known member
I shot a scene in several modes. I came to a surprising conclusion, same settings (except for framerate)
I shot 720p24 (left) and same shot 720p60 (right). Draw youre conclusion!
see pictures. Funny is that in 24p and 60p color is differant as well.
 

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So? You're filming outdoors, so conditions are uncontrollable, you obviously moved the camera at some point, and the shutter speed would be different as well. There are no conclusions to be drawn from this.
 
No different conditions as I told earlier. Same position. Shot 20 seconds form eachother, sunny.
Thing I would suggest with this is. Looks like when you shoot 720p60 and just put it in a 720p24 timeline you get sharper images.
 
It's not sharper, it merely has better contrast, and that could be from the shutter speed different alone (i.e. if you're set to 180 degrees, then 24 will have a 1/48, and 60 will have 1/120).

And a lot can happen outdoors within 20 seconds. Try shooting inside where you can control the light.
 
Please tell us about the shutter speeds.

Was the camera locked down? Windy day?

The 720p60 footage looks more contrasty and a little less exposed.

But the 720p24 footage does look a bit blurry. Maybe the shutter speed?
 
This is almost definitely due to shutter speed. The faster the speed the sharper an image due to stopping motion more, if the leaves move even an imperceptible amount, being captured at a slower shutter speed will blur that motion a slight bit more than at a higher speed. Contrast will also be effected by shutter speed. This isn't a problem with the camera, this would most likely happen on film as well. This is just what happens with a different shutter speed. You are effecting the exposure times, thus effecting the picture.
 
Giuseppe Pugliese said:
This is almost definitely due to shutter speed. The faster the speed the sharper an image due to stopping motion more, if the leaves move even an imperceptible amount, being captured at a slower shutter speed will blur that motion a slight bit more than at a higher speed. Contrast will also be effected by shutter speed. This isn't a problem with the camera, this would most likely happen on film as well. This is just what happens with a different shutter speed. You are effecting the exposure times, thus effecting the picture.
Click to expand...

This is shot in 720p60 vs 720p24, both same scene settings and shutter both 120, put in a 23,97 timeline.
See sample movie
https://download.yousendit.com/S1VCQndNNDJRR2Z2Wmc9PQ
 
to me that looks like different scene files. if it isn't then I am shocked to see that difference. The contrast is very different. I am going to try this on my 500 and see what happens. This could be due to rendering the file to play back at a regular speed when dropped into a 23.98... I'm just not sure yet, but i will test this out. did you shoot in 24p or 24pA that could make the difference right there. Theres lots of other things that can cause this, I'm sure we'll find it.
 
I shot same scene files, i just took care of that to don't get any misunderstanding.
I also turned it around. Put the shots in a 720p60 timeline, same result.

Yes try it, it's a fun test. The 60p looks very videoisch sharp compared to the 24p

I shot 24PN
 
There is an exposure difference. If you left the aperture the same for both frame rates, 60p will be underexposed compared to 24p, which could explain some of the contrast difference. Look at the whites in the clouds--big difference in IRE. I wouldn't use any shutter with 60p, and 180 degree with 24P.
 
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Dino said:
There is an exposure difference. If you left the aperture the same for both frame rates, 60p will be underexposed compared to 24p, which could explain some of the contrast difference. Look at the whites in the clouds--big difference in IRE. I wouldn't use any shutter with 60p, and 180 degree with 24P.
Click to expand...

you beat me to it, I was just going to post a similar thing haha, yeah once I figured that the shutter speed was the same, but the frame rate was different I was like.. wait that has to correspond to the same amount of exposure per frame. The "sharpness" that is perceived is actually not it being sharper. The contrast makes it look that way, adding contrast sharpens the image without actually adding any sharpening to it. (old photoshop trick) If you took the 24p footage and added the same amount of contrast in post, you would get a similar look to the frames that look "sharper" in the 60p look. As I thought before this IS an exposure difference and would happen just like it would happen in film.
 
Dino said:
There is an exposure difference. If you left the aperture the same for both frame rates, 60p will be underexposed compared to 24p, which could explain some of the contrast difference. Look at the whites in the clouds--big difference in IRE. I wouldn't use any shutter with 60p, and 180 degree with 24P.
Click to expand...

There is an exposure differancebut not that much. But the interpretation of both frame rates is differant funny enough. Same scene files but the dynamic range in 24 looks better. Take a look at the shadows level exposure. there about the same. That's why you can see the exposure is about the same. The dynamic range in 60p looks worse thats, why the clouds are whiter. The knee is higher in 24p although they have the exact same scene files. So I conlude that the interpretation of 60p and 24 is big differance. I don't have a resolution chart but I would like to see. The letters on the focus chart are softer in 24p. I don't know if thats a resolution or focus thing.
 
Using the same shutter angle in different frame rates will produce results like this. The shutter "speed" actually speeds up and slows down with the frame rate in that mode. If you're shooting 60 fps at 180 deg, the shutter is "open" for 1/30th of a second. But if you're shooting at 24 fps, it'll be "open" for 1/48 of a second, more than 50% longer. That difference would produce every difference in the image I'm seeing here.
 
David Jimerson said:
Using the same shutter angle in different frame rates will produce results like this. The shutter "speed" actually speeds up and slows down with the frame rate in that mode. If you're shooting 60 fps at 180 deg, the shutter is "open" for 1/30th of a second. But if you're shooting at 24 fps, it'll be "open" for 1/48 of a second, more than 50% longer. That difference would produce every difference in the image I'm seeing here.
Click to expand...

Wouldn't a 180deg shutter for 60p be 120th/sec?

24x2=48
60x2=120

1/30th for 60p would mean the 60p footage would be in danger of being soft due to the slower shutter.
 
D'oh!! Yes. What I meant. :shocked: Thanks for the correction. :) Point being, it accounts for the difference . . .
 
This difference would only show in exposure and motion. If the scene or subject was still, 1/120th of a sec would be no sharper than 1/48th of a sec.
 
I don't see it being sharper either, the difference is the contrast within the light and dark in the image, not sharpness. Contrast makes the image SEEM sharper.
 
"If the scene or subject was still, 1/120th of a sec would be no sharper than 1/48th of a sec."

That means camera and everything in frame are perfectly "still." This doesn't happen often.

The fast shutter can give unnatural motion though. That motion blur helps keep the thing flowing in people's minds.
 
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