Questions from manual at DVinfo.net
DV Info Net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders

Canon XL and GL Series DV Camcorders
Canon XL2 / XL1S / XL1 and GL2 / XM2 / GL1 / XM1.

Reply
 
Thread Tools Search this Thread
Old November 27th, 2004, 02:01 PM   #1
Regular Crew
 
Join Date: May 2004
Posts: 80
Questions from manual

Questions from manual

1. "* if you have no external ND filter, use Tv mode and set a high shutter speed or use Av mode and set a small aperture value"

Does this mean if you have no matte box + filter or no lens with filter I.E provided 20x lens.

2. "Turning On/Off the ND filter changes the apertature setting. Readjust the aperture in Av mode as required."

Why does it say in Av mode, what is the realtionship to Av mode and the filter?

Also, why does using the filter adjust the aperture? Is the ND filter a true filter or is it just setting the aperture differently.
Kent Dammand is offline   Reply With Quote
Old November 27th, 2004, 02:52 PM   #2
Major Player
 
Join Date: Jun 2004
Location: McLean, VA United States
Posts: 749
1. With or without an external ND filter setting a high shutter speed in Tv mode will require a larger lens opening (smaller f/ number) to achieve the correct exposure. Setting a larger aperture (smaller f/ number) in Av mode will require a longer shutter speed which will be selected automatically.

2. If you enable one of the internal (or add an external) ND filter in Av mode the amount of light reaching the CCD will be reduced and the aperture will open automatically in Tv mode to restore the same level as before the filter was added. In Av mode the aperture will stay the same but the shutter speed will increase. As the object here is, apparently, to increase the aperture (for reduced DOF I assume) one must, in this mode, manually increase the aperture. If the aperture is opened to admit as much extra light as the neutral density filter attenuates the shutter speed will stay the same.
A. J. deLange is offline   Reply With Quote
Old November 28th, 2004, 12:33 PM   #3
Regular Crew
 
Join Date: May 2004
Posts: 80
Does anyone here actually use av or tv mode or mainly manual mode?

I still dont see the reason for using it.
Kent Dammand is offline   Reply With Quote
Old November 28th, 2004, 01:20 PM   #4
Major Player
 
Join Date: Jun 2004
Location: McLean, VA United States
Posts: 749
If you want a particular shutter speed (because, for example, you want to eliminate the blur in a rapidly moving object) AND you want the camera to follow changing light levels for you automatically you use Tv mode.

If you want a particular aperture (because, for example, your lens is sharpest at f/8) AND you want the camera to follow changing light levels automatically you use the Av mode.

If you don't want automatic exposure control, you use manual. Personally, that's my preference for most applications because I don't like watching the background change when someone moves from light to shadow. In the real world the background stays the same and the person becomes harder to see when he moves into a shadow. But that's just my preference and not all the time. If the light change is rapid and tricky and you want the subject properly exposed, then you may find that auto can do it better than you can. Note that the auto modes will also change the gain.
A. J. deLange is offline   Reply With Quote
Old November 28th, 2004, 03:45 PM   #5
Regular Crew
 
Join Date: May 2004
Posts: 80
Thanks, thats very clear now
Kent Dammand 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...

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

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


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 HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 07:33 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network