Slow shutter speed video at DVinfo.net

Denis OKeefe · July 14th, 2009, 11:53 AM

I'd like the option of shooting video at less than 1/30th, but can't see a way to do that out of the box. I've just begun playing/working with Magic Lantern - is that the path to slow shutter speeds? If so, I'll add it to the list of feature requests.
As a side note, the Canon manual gives me a headache - my hat is off to Tramm for his fantastic (and perhaps potential insanity causing)work.

Jon Fairhurst · July 14th, 2009, 11:59 AM

You can't shoot slower than 1/30, given that it starts a new frame 30 times a second. The solution is to blend frames in post.

How to do this depends on your NLE. One of the easiest ways is to double the track, slide one clip by a frame and mess with the opacity of the top timeline. Setting the opacity to 50% simulates 1/15th. You can add more tracks with more frame offsets for longer simulated exposures.

Again, your particular NLE might offer a more elegant solution.

Denis OKeefe · July 14th, 2009, 12:39 PM

THe EX3 gives me a slow shutter option that once in a while works just perfectly. To combine that with the 35mm "look" (without a lens adapter) would be terrific. Unfortunately post is not an option.
So it goes on my "wish list".

Jon Fairhurst · July 14th, 2009, 02:10 PM

Quote:

Originally Posted by Denis OKeefe

Unfortunately post is not an option.

Are you shooting live?

Denis OKeefe · July 17th, 2009, 12:11 PM

Hi Jon, sorry to have dropped the topic. Yes, the EX shoots slow shutter on live video. It is still 24, 30 or 60 frames per second, each is just slower (or faster) than 1/30th.
It is a useful effect especially for those "crime scene" "drug" "dream" sequences. Here is a short sample - an outtake from a recent project:

By Denis OKeefe On ExposureRoom

It would be useful to have full shutter control of the Canon in video mode, just wondering if it is possible. I'll put it on the Magic Lantern feature request list.

Jon Fairhurst · July 17th, 2009, 12:36 PM

That's definitely achievable in post. Unless you're shooting live, I'm not sure why that's not an option.

Here's the good news: rolling shutter distortion can actually add to the drug/dream effect. :)

Such a feature isn't likely to happen in Magic Lantern soon, since this would involve changing the image processing pipeline, rather than control and overlays.

Denis OKeefe · July 17th, 2009, 01:49 PM

too bad, guess I'll have to see about making it happen in post

Evan Donn · July 21st, 2009, 09:58 AM

"I just set the camera to half a second exposure and kept shooting in continuous mode."

It's interesting, I was thinking it's too bad you can regulate the speed of the continuous shooting mode but it didn't occur to me that using slow shutter speeds would allow you to do this. I guess the max 'accurate' slow shutter speed you could use would be 1/4 as 3.9 fps is the limit for continuous stills.

Is it possible to shoot continuously with the electronic shutter only? It seems like that would be ideal so as to avoid wear & tear on the mechanical shutter.

Jon Fairhurst · July 21st, 2009, 10:26 AM

Quote:

Originally Posted by Evan Donn

Is it possible to shoot continuously with the electronic shutter only? It seems like that would be ideal so as to avoid wear & tear on the mechanical shutter.

If you shoot in Live View, you avoid the flipping the mirror, but the mechanical shutter still clicks.

BTW, if you shoot timelapse with a small aperture, press the DOF button and untwist the lens. Otherwise the aperture opens and closes for each shot. This causes the aperture to change shot to shot, resulting in flicker.

July 14th, 2009, 11:53 AM	#1
Denis OKeefe Major Player Join Date: Aug 2008 Location: Wayne, PA Posts: 207	Slow shutter speed video I'd like the option of shooting video at less than 1/30th, but can't see a way to do that out of the box. I've just begun playing/working with Magic Lantern - is that the path to slow shutter speeds? If so, I'll add it to the list of feature requests. As a side note, the Canon manual gives me a headache - my hat is off to Tramm for his fantastic (and perhaps potential insanity causing)work.

July 14th, 2009, 11:59 AM	#2
Jon Fairhurst Inner Circle Join Date: May 2006 Location: Camas, WA, USA Posts: 5,513	You can't shoot slower than 1/30, given that it starts a new frame 30 times a second. The solution is to blend frames in post. How to do this depends on your NLE. One of the easiest ways is to double the track, slide one clip by a frame and mess with the opacity of the top timeline. Setting the opacity to 50% simulates 1/15th. You can add more tracks with more frame offsets for longer simulated exposures. Again, your particular NLE might offer a more elegant solution. __________________ Jon Fairhurst

July 17th, 2009, 12:36 PM	#6
Jon Fairhurst Inner Circle Join Date: May 2006 Location: Camas, WA, USA Posts: 5,513	That's definitely achievable in post. Unless you're shooting live, I'm not sure why that's not an option. Here's the good news: rolling shutter distortion can actually add to the drug/dream effect. :) Such a feature isn't likely to happen in Magic Lantern soon, since this would involve changing the image processing pipeline, rather than control and overlays. __________________ Jon Fairhurst

July 21st, 2009, 09:58 AM	#8
Evan Donn Major Player Join Date: Feb 2006 Location: Philadelphia Posts: 795	"I just set the camera to half a second exposure and kept shooting in continuous mode." It's interesting, I was thinking it's too bad you can regulate the speed of the continuous shooting mode but it didn't occur to me that using slow shutter speeds would allow you to do this. I guess the max 'accurate' slow shutter speed you could use would be 1/4 as 3.9 fps is the limit for continuous stills. Is it possible to shoot continuously with the electronic shutter only? It seems like that would be ideal so as to avoid wear & tear on the mechanical shutter. __________________ My latest short documentary: "Four Pauls: Bring the Hat Back!"

July 14th, 2009, 12:39 PM	#3
Denis OKeefe Major Player Join Date: Aug 2008 Location: Wayne, PA Posts: 207	THe EX3 gives me a slow shutter option that once in a while works just perfectly. To combine that with the 35mm "look" (without a lens adapter) would be terrific. Unfortunately post is not an option. So it goes on my "wish list".

July 17th, 2009, 12:11 PM	#5
Denis OKeefe Major Player Join Date: Aug 2008 Location: Wayne, PA Posts: 207	Hi Jon, sorry to have dropped the topic. Yes, the EX shoots slow shutter on live video. It is still 24, 30 or 60 frames per second, each is just slower (or faster) than 1/30th. It is a useful effect especially for those "crime scene" "drug" "dream" sequences. Here is a short sample - an outtake from a recent project: By Denis OKeefe On ExposureRoom It would be useful to have full shutter control of the Canon in video mode, just wondering if it is possible. I'll put it on the Magic Lantern feature request list.

July 17th, 2009, 01:49 PM	#7
Denis OKeefe Major Player Join Date: Aug 2008 Location: Wayne, PA Posts: 207	too bad, guess I'll have to see about making it happen in post