figuring out approx focal length 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 March 17th, 2008, 02:16 PM   #1
New Boot
 
Join Date: Dec 2007
Location: NY, USA
Posts: 19
figuring out approx focal length

I was wondering if there was any way to determine the approximate focal length of the XH-A1. I need to add some CG to XH-A1 footage that will be shot with the stock lens. However, it seems that there is just a slider in the viewfinder and no readout of what the approximate focal length would be.

Does anyone know a way to figure this out? Is there some setting in the preferences that will make this info appear in the viewer? If not, is there some formula to use based on points you can see, distance from the gate, parallax and all that jazz?

Btw, the shot will be locked off, no camera movement, so we can't use boujou to track it. While we will be setting up the cameras by eye in Maya, guessing the focal length can be a real pain, especially since this is a zoom lens the focal length may need to be a decimal value.

Any info will be appreciated.

Thanks

D
Darren D'Agostino is offline   Reply With Quote
Old March 17th, 2008, 03:14 PM   #2
Regular Crew
 
Join Date: Feb 2008
Location: Minneapolis, MN
Posts: 37
Hello Darren,

This is actually answered in another post:

http://www.dvinfo.net/conf/showthrea...hlight=a1+lens

In your settings on the A1, there is a Custom Functions feature that allows you to assign a numeric value to the zoom setting.

Find the chart in the thread above to convert the zoom numbers to 35mm focal lengths.

Hope this helps!
Dmitry Futoryan is offline   Reply With Quote
Old March 17th, 2008, 03:32 PM   #3
New Boot
 
Join Date: Dec 2007
Location: NY, USA
Posts: 19
I didn't see this when I did a search. Should do just what I need.

Thanks a lot for the help

D
Darren D'Agostino 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 10:41 PM.


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