GH2 1:1 Crop Mode - Page 2 at DVinfo.net

Go Back   DV Info Net > Panasonic P2HD / AVCCAM / AVCHD / DV Camera Systems > Panasonic LUMIX G / GF / GH / GX Series

Panasonic LUMIX G / GF / GH / GX Series
4K and AVCHD on a Micro Four Thirds system camera with interchangeable lenses.


Reply
 
Thread Tools Search this Thread
Old December 12th, 2010, 07:21 PM   #16
Regular Crew
 
Join Date: Mar 2010
Location: McLean, VA USA
Posts: 31
Sample EX GH2 Tele video

GH2, 100-300 EX Tele (1560 mm) video


This is a H.264 file file, with no adjustments. I converted the MTS file to Apple ProRes HQ, and exported the H264 from FCP. Media info shows the MTS file bit rate as 21.3 kbps (the max rate shows as 21.7 kbps). I used the 24P(H) setting. Iíve included some video with focus shifting and image wobble to show the issues I encountered at this magnification, despite using a heavy Miller video tripod and Sachtler fluid head. The latter part of the video is at 300mm, which is the equivalent of a 1560mm lens on 35mm.

Bill
Bill Hollinger is offline   Reply With Quote
Old December 13th, 2010, 05:57 AM   #17
Regular Crew
 
Join Date: May 2008
Location: U.K
Posts: 154
Considering the extreme focal length, I think you did a pretty good job of keeping it under control. The image looks very clean.
__________________
Adrian
http://chillfactorfilms.com
Adrian Frearson is offline   Reply With Quote
Old December 13th, 2010, 07:53 AM   #18
Inner Circle
 
Join Date: Jan 2004
Location: Boca Raton, FL
Posts: 2,979
The bokeh is nice, not at all like a small chip camera, then again, what small chip camera and lens could even resolve 1500mm like that! Woot!
Les Wilson is offline   Reply With Quote
Old December 20th, 2010, 02:54 PM   #19
New Boot
 
Join Date: Nov 2008
Location: San Francisco, CA
Posts: 24
Quote:
Originally Posted by Daniel von Euw View Post
The DoF of the 1080p crop is equal to a 1/2" sensor.
The DoF of the 720p crop is equal to a 1/3" sensor.


regards
Daniel
I believe this is incorrect, the 1:1 crop has absolutely no effect on depth of field. The sensor size itself isn't changing, nor is the flange distance changing to compensate and the circle of confusion remains the same. To my understanding, in the 1:1 crop mode, the three factors of depth of field (circle of confusion, aperture and subject distance) all remain the same. The circle of confusion for 4/3" is 0.015mm. Panavision rates a 2/3" chip CoC at 0.009mm. A 1/4" chip is about ~0.0025mm.

I'll put it another way, the 1:1 crop factor is the exact same as if you were able to take footage shot without the crop mode, go into Photoshop and crop the center of the image while maintaining resolution. Cropping in Photoshop would have absolutely no effect on depth of field. If it did, I would approach cinematography very differently.
James Chen is offline   Reply With Quote
Old December 20th, 2010, 03:45 PM   #20
Major Player
 
Join Date: Jun 2006
Location: Canberra Australia
Posts: 227
A 50mm lens is a 50mm lens - the DoF doesn't change no matter what you put it on. Large sensor or small the DoF is the same (OK, there are very small differences) what changes is the Angle of View.

If you have a head shot with 50mm on the GH2 and then use the crop you will need a wider angle lens (about a 20mm) to get the same shot - which will have a deeper DoF. If you are using it to get the close up the DoF stays the same.
__________________
Lighting Cameraman - www.rotahead.com.au
Sony PMW-350, FS7, JVC LS300, BMPCC, BMPC, GH5 & a shed full of lights,dollies, jibs
Rohan Dadswell is offline   Reply With Quote
Old December 25th, 2010, 04:49 AM   #21
Trustee
 
Join Date: Dec 2005
Location: Massachusetts
Posts: 1,771
I have a lot of "full frame" and crop shots in here:
Paulo Teixeira 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 > Panasonic P2HD / AVCCAM / AVCHD / DV Camera Systems > Panasonic LUMIX G / GF / GH / GX Series

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 08:43 PM.


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