shutter angle? at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon XF Series HD Camcorders

Canon XF Series HD Camcorders
Canon XF305, XF205 and XF105 (with SDI), Canon XF300, XF200 and XF100 (without SDI).


Reply
 
Thread Tools Search this Thread
Old February 4th, 2011, 10:10 AM   #1
Major Player
 
Join Date: Dec 2002
Location: Plantation, FL
Posts: 238
shutter angle?

Can someone explain shutter angle to me?
I'm not a newbie . . . but i've never encountered this before.

I'm trying out the xf305 for a week and the manual is of no use in this and many other elements of the camera.

Thanks,
__________________
Mark Ahrens
www.heritagefilms.net
Mark Ahrens is offline   Reply With Quote
Old February 4th, 2011, 03:13 PM   #2
Major Player
 
Join Date: Jan 2005
Location: Wellington, New Zealand
Posts: 513
As I understand it (please correct me if I'm wrong):

At 360 degrees the shutter is "open", and will correspond to your frame rate. Ie: 24p = 1/24

As you reduce the degrees, the amount of light per frame is proportionately reduced, so at 24P:
270 degrees = 1/36, 180 degrees = 1/48 and so on.

I'm curious as to why this option of setting shutter by degrees (in addition to just dialing the shutter in as a fraction of a second) is available on the camera. Perhaps someone more knowledgeable on the subject can shed light on its practical application.
Josh Dahlberg is offline   Reply With Quote
Old February 4th, 2011, 03:53 PM   #3
Major Player
 
Join Date: Apr 2006
Location: Sweden
Posts: 244
Hi

The shutter degree values comes from ordinary film cameras where you have a mecanical shutter rotating between the lens and the film. A 180 degree shutter is a circular plate that has half of the plate cut off. If this plate is rotating 96 times per second it will expose each square of the film 1/48 second.

Regards,

/Bo
Bo Sundvall is offline   Reply With Quote
Old February 4th, 2011, 05:15 PM   #4
Regular Crew
 
Join Date: Jan 2010
Location: Oakland, CA
Posts: 81
Wikipedia has a decent short discussion of this topic: Rotary disc shutter - Wikipedia, the free encyclopedia -- I guess I'm old enough to remember when shutter angle was the main way of specifying shutter "speed" :-).
Hamish Reid is offline   Reply With Quote
Old February 4th, 2011, 06:35 PM   #5
Major Player
 
Join Date: Oct 2010
Location: United Kingdom
Posts: 223
So what's the best setting to have it on for normal use?
Andy Solaini is offline   Reply With Quote
Old February 4th, 2011, 07:02 PM   #6
Major Player
 
Join Date: Dec 2002
Location: Plantation, FL
Posts: 238
Yeah . . . what's the application?
When would this be useful?
__________________
Mark Ahrens
www.heritagefilms.net
Mark Ahrens is offline   Reply With Quote
Old February 4th, 2011, 07:53 PM   #7
Vortex Media
 
Join Date: Jan 2009
Location: New England, USA
Posts: 2,480
Shutter angle vs. shutter speed is the basically the same thing as . . .
Fahrenheit vs. Celcius
or
Meters vs. Feet.

It's just two different ways of describing the exact same measurement.

180 degree shutter is equivalent to 1/48th for 24P shooting
180 degree shutter is equivalent to 1/60 for 30P shooting

Shutter angle terminology is a hold over from the film production world, but the advantage of using the shutter angle mode on a video camera is that you can just set it on 180 degrees and then you don't have to bother with changing the shutter speed when you switch from 24P to 30P. The shutter speed is going to be the equivalent of 1/60 or 1/48 automatically. That is when it is useful.
__________________
Vortex Media http://www.vortexmedia.com/
Sony FS7, F55, and XDCAM training videos, field guides, and other production tools
Doug Jensen is offline   Reply With Quote
Old February 5th, 2011, 06:18 AM   #8
Major Player
 
Join Date: Dec 2002
Location: Plantation, FL
Posts: 238
Ah, thanks!
__________________
Mark Ahrens
www.heritagefilms.net
Mark Ahrens is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon XF Series HD Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 08:57 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network