Shallow to Deep focus possible in a scene? at

Go Back   DV Info Net > High Definition Video Acquisition > Photo for HD Video (D-SLR and others)

Photo for HD Video (D-SLR and others)
HD from Nikon D90, other still photo cams (except EOS 5D Mk. II, LUMIX GH1).

Thread Tools Search this Thread
Old October 26th, 2010, 09:11 AM   #1
Regular Crew
Join Date: Mar 2010
Location: Flemington, NJ
Posts: 120
Shallow to Deep focus possible in a scene?

Hey everyone,
I have a weird question... is it possible to go from a shallow DOF to a Deep DOF in one scene, almost like a rack focus but much more complicated.

I've never tried it, but giving it some thought it theoretically seems possible.... What if you.....
1. Start at a high fstop lets just say f16,
2. Go to your ycamera settings use the setting that slows down the change of the iris, so that when you turn it, it changes very smoothly.
3. In the settings, do the same thing with the gain, so that it changes slowly.
4 FINAL ...... Shoot the shoot at the high fstop, then open up the iris and bring the gain down

It may sound impossible to pull off, but would it work?
Are there any scenes in films that do do it, or is there a name for this shot?

Nick Popa is offline   Reply With Quote
Old October 27th, 2010, 12:54 PM   #2
Inner Circle
Join Date: Feb 2006
Location: Belfast, UK
Posts: 4,063
In theory it's possible, although perhaps a DSLR camera with its moire issues and an OLPF intended for stills rather the video function (i.e the shallow DOF is being used to reduce this issue) mightn't be the best type of camera to do this.

It can happen with an in camera speed ramp, if the aperture is being adjusted when the frame rate changes. It could work if a character feels less isolated and becoming more aware of the world around them Like all effects, there has to be reason for doing it otherwise it just draws attention to itself..
Brian Drysdale is offline   Reply With Quote
Old October 27th, 2010, 03:42 PM   #3
Major Player
Join Date: Mar 2009
Location: Ottawa, ON
Posts: 385
On a DSLR, I would suggest using a manual focus lens that's been de-clicked with a smooth aperture, Leave the camera on auto-exposure or in the case of Canon DSLRs, use auto-ISO. Then just let the camera take care of the exposure while you handle the aperture. You'd pretty well want to use a lens that's no longer than the standard 50mm equiv. A 35mm or 50mm equiv FOV is likely the best focal length for this. You'd probably want a fast lens too.
Kin Lau is offline   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

Omega Broadcast
(512) 251-7778
Austin, TX

(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

(800) 238-8480
Glendale, 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 > High Definition Video Acquisition > Photo for HD Video (D-SLR and others)

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 07:55 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2015 The Digital Video Information Network