how to make everything in focus? at DVinfo.net

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

Canon XH Series HDV Camcorders
Canon XH G1S / G1 (with SDI), Canon XH A1S / A1 (without SDI).


Reply
 
Thread Tools Search this Thread
Old November 8th, 2007, 04:59 PM   #1
Major Player
 
Join Date: Jan 2007
Location: Warwick, Rhode Island
Posts: 740
how to make everything in focus?

I remember the flaw of old camera was no depth of field no matter what. You zoom in, everythings in focus, you zoom out, everything is in focus. Now with the A1 it seems something is always a little bit soft...maybe its just the LCD i`m not sure, which is why I`m asking, but how do you get a whole scene (indoor and outdoor) to be in focus?
__________________
Cinematography Site
Nathan Quattrini is offline   Reply With Quote
Old November 8th, 2007, 06:02 PM   #2
Regular Crew
 
Join Date: Nov 2004
Location: kelseyville, ca
Posts: 123
Panavision was supposed to have a lens like that a couple of years ago.
Check page 57.
http://www.panavision.com/media/Panavision_Camera.pdf
Darrell
FIRST CINEMA PICTURES
__________________
darrell
Darrell Essex is offline   Reply With Quote
Old November 8th, 2007, 08:29 PM   #3
New Boot
 
Join Date: May 2007
Location: Sarasota, FL
Posts: 13
I usually just set my aperture pretty closed and avoid zooming too much. Originally I felt this was a complete pain, but the more I use the camera the more I realize its not as difficult to pull of as it seems.
Sebastian Baron is offline   Reply With Quote
Old November 9th, 2007, 02:41 AM   #4
Major Player
 
Join Date: Jul 2007
Location: Gainesville, VA, USA
Posts: 327
Nathan,

I'm not sure I understand your question clearly. If "everything" is in focus you actually have a large DOF and not no DOF.

DOF is controlled by a couple of things (barring the size of the CCD since that's not something you can change/control).

When you stop down the aperture (a smaller apperture) (or iris) you get a larger DOF. That is, f/22 will give you a larger DOF than f/2.6

Telephoto (zooming in) tends to give you a shallow DOF and wide will give you a larger DOF.

So keep you lens zoomed out and your aperture small and you'll get a larger DOF.

Zoom in completely and keep your aperture wide open and you get a shallow depth of field.

Keep in mind also that the distance of the object in focus from the camera also changes the DOF for the given focal length of the lens and aperture settings. The further away the subject the larger the apparent DOF.
__________________
Canon XH-A1, Libec LS-55M, Letus Extreme, Steadicam Merlin, PPro CS3
Shiv Kumar is offline   Reply With Quote
Old November 9th, 2007, 05:27 AM   #5
Trustee
 
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
Watch out for diffraction! The A1 image at small apertures is not sharp. Applies to other high res cams with small sensors too.

Richard
Richard Hunter is offline   Reply With Quote
Old November 9th, 2007, 08:41 AM   #6
Major Player
 
Join Date: Nov 2006
Location: Ocean Springs, MS
Posts: 211
DOF & Focus

I have also found that shooting when shooting in 60i vs. 30p or 24p that the camera focuses much quicker. In 30p there would be times when the camera could not find a focal point. In 60i, never had that problem. You do loose a little of the DOF but the IAF is much more effective.

Jon Schwartz
Jonathan Schwartz is offline   Reply With Quote
Old November 9th, 2007, 11:37 PM   #7
Inner Circle
 
Join Date: Apr 2003
Location: Aus
Posts: 3,884
The A1 doesn't go above f/11, so you have to make do with faster shutters, and tweaking focus to infinity.
Peter Jefferson 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 HDV and DV Camera Systems > Canon XH Series HDV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:18 PM.


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