Manual IRIS Question at DVinfo.net

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

Canon XL H Series HDV Camcorders
Canon XL H1S (with SDI), Canon XL H1A (without SDI). Also XL H1.


Reply
 
Thread Tools Search this Thread
Old January 4th, 2006, 09:30 PM   #1
New Boot
 
Join Date: Nov 2005
Posts: 5
Manual IRIS Question

I was filming a conference recently with a Sony FX1, located at the rear of the venue the light was definitely borderline for perfect results. All settings on manual I opened the iris to max; white balanced with available light and set the shutter speed to 50. My problem was when I zoomed into the presenters face the camera automatically closed the iris. Even though I had everything set to manual it overrode and changed my settings by a full stop. When I zoomed out my manual settings are back and fixed. When I use my DSR500 I set the iris to manual and no matter what I do with the focal lenght that is that, so my question is given the same situation will the Canon H1 act like the semi pro FX1 or DSR500 with respect to holding the iris settings?

Cheers, Ian
Ian Richards is offline   Reply With Quote
Old January 4th, 2006, 10:06 PM   #2
Obstreperous Rex
 
Join Date: Jan 2001
Location: San Marcos, TX
Posts: 26,900
Images: 513
Quote:
Originally Posted by Ian Richards
when I zoomed into the presenters face the camera automatically closed the iris.
It's important for you to understand why this is happening. Most, not all, but most zoom lenses will have different maximum aperture values at either end of the zoom range, as you found out on the FX1. The stock 20x zoom lens on the XL H1 is no exception. At full wide, the maximum aperture is f/1.6, and when you zoom in to full telephoto, the maximum aperture is f/3.5. The way to stop the exposure from changing on you is to lock the iris at f/3.5 so that it's the same whether you're zoomed all the way in or all the way out. Compensate for the lost f/stops by increasing gain, decreasing shutter speed or both.

When shooting in Standard Definition, another option on the XL H1 is to change out the lens and switch it for the black 16x manual zoom lens. This lens holds a max. aperture of f/1.6 throughout the entire zoom range. It's one of the few video lenses in this market that does. The lens on the Panasonic DVX100 series does as well. Hope this helps,
__________________
CH

Search DV Info Net | DV Info Net Sponsors | A Decade (+5) of DVi | ...Tuesday is Soylent Green Day!
Chris Hurd is offline   Reply With Quote
Old January 5th, 2006, 01:14 AM   #3
New Boot
 
Join Date: Nov 2005
Posts: 5
Manual IRIS Question

Thanks very helpful, I hope Canon make an HD version of the black 16x manual zoom lens. While discussing the lens can you tell me if what is being said about it handling like on old dog is true. And that while it’s a great camera for set pieces it might not cut the mustard for general videography work.

Thanks again, Ian
Ian Richards 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 XL H Series HDV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

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


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