Does 7D really have custom shutter speeds ?

zcream

Well-known member
I am in Manual exposure mode.

I can only change the shutter from 1/30 to 1/45 to 1/60 with the dial.
Canon advertises that I can use ANY shutter speed.

What am I missing ?
 
I have noticed the same thing. When in movie mode, if I'm set to 720@60fps, 1/60 is as low as I can go. If I'm set to 1080@24fps, 1/30 is as low as I can go. What if I want to do something crazy and shoot at 1/10? Is it manual control or not?
 
Its even worse. From what I see, it goes 1/30, 1/45, 1/60, 1/95, 1/125

WTF.

Who thought of these shutter speeds ?
I hope I'm missing something, some setting somewhere..The manual does not talk about it.

Some folks got 1/50th shutter, so it must be there..
 
I have noticed the same thing. When in movie mode, if I'm set to 720@60fps, 1/60 is as low as I can go. If I'm set to 1080@24fps, 1/30 is as low as I can go. What if I want to do something crazy and shoot at 1/10? Is it manual control or not?

It's not possible to shoot at a shutter speed that's slower than your frame rate. If you want to shoot at 1/10th of a second, the fastest your framerate could be is 10 fps. I guess the next best option would be in picture mode and shoot at 8fps.
 
From Canon ..
http://usa.canon.com/dlc/controller?act=GetArticleAct&articleID=3050

Set the camera to video recording mode, and turn the Mode Dial to “M”. Now set any aperture that’s possible with your lens, any shutter speed from 1/4000th down to 1/30th or 1/60th (depending on frame rate — more in a moment), and any ISO you like from 100 through 6400.



The case for 24 fps: You’ll hear some experienced video shooters say that 24 fps generates more of a “film look”, meaning that certain types of motion appear more natural to your eye and brain. However, this slower frame rate can sometimes produce movements that are less smooth than when captured at 30 or 60 fps. This can be an issue if you anticipate frequent subject movement, or camera movement (think of “reality” TV shows as one example of this type of shooting where there is constant movement of both subject and camera). This also presupposes slower shutter speeds, around 1/50th of a second.



WHERE IS 1/50 ?
 
Maybe you have a dud, as far as I know everybody has 1/50th of second shutter speed.
 
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I recall a very nice GH1 (IIRC) piece shot at night in a graveyard. It involved "ghosty" very blurred movement of characters that really worked in the piece. IIRC, a very slow shutter speed (way below the frame rate) was how the shooter accomplished the effect.
 
I recall a very nice GH1 (IIRC) piece shot at night in a graveyard. It involved "ghosty" very blurred movement of characters that really worked in the piece. IIRC, a very slow shutter speed (way below the frame rate) was how the shooter accomplished the effect.

Yes, it's possible to record 24 fps at a 1/12 of a second, but that really ends up being 12 fps with duplicate frames in a 24fps. It still doesn't change the fact that it's 12 fps.
 
Yes but I believe that is accomplished by basically combining several frames into one. It's physically impossible to have the sensor exposed for separate frames 24 times per second, while each exposure lasts 1/10 of a second.
 
That makes perfect sense...Thanks! Anyone know how the "ghosts" were achieved? What would one do with Premiere CS4.1 to duplicate the effect? I guess it's motion blur to the extreme?
 
They advertise that you can set any shutter speed from 30 to 4k so can you set 48 for example ?
 
I am in Manual exposure mode.

I can only change the shutter from 1/30 to 1/45 to 1/60 with the dial.
Canon advertises that I can use ANY shutter speed.

What am I missing ?

I'd love to know how you got to a 1/45 in the first place. I've never seen it on this camera.
 
Those thinking that "Setting shutter speed between 30 to 4K" means everything from 1/31, 1/32, to 1/3998, 1/3999 or something need to realize shutter speed and f/stop correlation. Every time you move a stop brighter the shutter speed correlates and moves a stop down as well. There's no real in-betweeners on a set scale.
 
I recall a very nice GH1 (IIRC) piece shot at night in a graveyard. It involved "ghosty" very blurred movement of characters that really worked in the piece. IIRC, a very slow shutter speed (way below the frame rate) was how the shooter accomplished the effect.

That was me. My second GH1 film, "A Kindling Light". You find it on Vimeo through my sig link below.

Yes but I believe that is accomplished by basically combining several frames into one. It's physically impossible to have the sensor exposed for separate frames 24 times per second, while each exposure lasts 1/10 of a second.

Wrong. It was filmed at 1/2 second shutter speed.

That makes perfect sense...Thanks! Anyone know how the "ghosts" were achieved? What would one do with Premiere CS4.1 to duplicate the effect? I guess it's motion blur to the extreme?

I do know but I don't want to high-jack this thread so you can check info about how I did it and ask more here:

http://www.dvxuser.com/V6/showthread.php?t=177342
 
One more (what seems to be an OT ? to me)....So the GH1 does allow 1/2s shutter speeds in 720 mode and the 7D limits all shutter speeds to no lower than FPS? Too bad...it was a magnificent effect and you used it perfectly. Incredible concept, understanding and execution.
 
Video camera like my XHA1 also allow lower shutter speed than frame rate, and it double light sensitivity from 30th to 15th and on down to I believe 1/4th
 
I had my CF1 : Exposure setting to 1/2 stop increments. So it moves 30, 45, 60 etc.

I changed it to 1/3 stop increments and now I get 30, 40, 50 etc.

I'd love to know how you got to a 1/45 in the first place. I've never seen it on this camera.
 
If I understood your question correctly,
you're asking why you can not dial any number for the shutter speed, ex.: 1/30, 1/29, 1/28,..

Shutter speeds increase or decrease by FRACTIONS, values such as 1/7 or 1/22 do not exist in any camera.
it's like f-numbers, there are f2, f2.8, f3.2, but no such thing as f2.1 or f3.0 ...
 
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