Manual Iris - sometimes not!!! Ramping? at DVinfo.net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-Z1 / HDR-FX1

Sony HVR-Z1 / HDR-FX1
Pro and consumer versions of this Sony 3-CCD HDV camcorder.


Reply
 
Thread Tools Search this Thread
Old November 16th, 2011, 10:40 AM   #1
Inner Circle
 
Join Date: Nov 2008
Location: UK/Yorkshire
Posts: 2,066
Manual Iris - sometimes not!!! Ramping?

Any tips on overriding Iris ramping on the Z1 or FX1? I've been using these cameras a while now but still unsure how the Iris goes 'auto' even when in manual at the full extent of the zoom

Cheers

Pete
Peter Rush is offline   Reply With Quote
Old November 16th, 2011, 01:57 PM   #2
Inner Circle
 
Join Date: Jan 2007
Location: Woodinville, WA USA
Posts: 3,464
Re: Manual Iris - sometimes not!!! Ramping?

It's a physical property of the lens and can't be overridden. It's physically impossible. The f-number is an actual physical ratio of the iris opening to the focal length. It's not "going auto." As the focal length increases, so does the ratio (f-number), even if the actual iris size stays the same.
__________________
"It can only be attributable to human error... This sort of thing has cropped up before, and it has always been due to human error."
Adam Gold is offline   Reply With Quote
Old November 18th, 2011, 11:06 AM   #3
Inner Circle
 
Join Date: Mar 2003
Location: Billericay, England UK
Posts: 4,711
Re: Manual Iris - sometimes not!!! Ramping?

Peter, if you lock the aperture at f/2.8 or smaller (down to f/11) then there will appear to be no lens ramping. Wherever you are in the zoom range it will be f/4 (or whatever you've selected) at the chips.

It's only when you're shooting at f1.6 to f/2.8 that you'll experience ramping. You can leave the gain on auto to hide the effects but I dislike doing this. We all do. When you talk about 'the iris going auto', is this what's happening?

Remember - if you don't see the iris, gain, shutter or w/bal displayed in the v'finder then that discipline is in auto.

tom.
Tom Hardwick 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 > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-Z1 / HDR-FX1

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 05:19 PM.


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