EX3 stock lens vs. 3rd party lenses on ramping and breathing at DVinfo.net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Sony XDCAM EX Pro Handhelds
Sony PMW-300, PXW-X200, PXW-X180 (back to EX3 & EX1) recording to SxS flash memory.


Reply
 
Thread Tools Search this Thread
Old July 28th, 2009, 04:33 AM   #1
Regular Crew
 
Join Date: Mar 2004
Location: NY
Posts: 186
EX3 stock lens vs. 3rd party lenses on ramping and breathing

The EX stock lens doesn't ramp or breathe, an excellent feature. Have any EX3 owners found this to be of any other 1/2" lenses from Fuji or Canon?
Max Allen is offline   Reply With Quote
Old July 29th, 2009, 12:29 PM   #2
Inner Circle
 
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
All traditional lenses will breathe to greater or lesser extent as focusing is achieved by moving the front lens element forwards and backwards. Most of the lower cost HD lenses breathe quite a lot. The ex lenses don't breathe as focusing is done by electronicaly moving the some of the rear lens elements.
__________________
Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com
Alister Chapman is offline   Reply With Quote
Old July 29th, 2009, 03:26 PM   #3
Major Player
 
Join Date: Jul 2008
Location: Melbourne, Australia
Posts: 393
My XS lens on my EX3 breathes quite a bit, but as Alister mentioned, that is because of the lens movement. Not a big deal for me.
__________________
David Issko
Edit 1 Video Productions
David Issko is offline   Reply With Quote
Old July 29th, 2009, 04:57 PM   #4
Regular Crew
 
Join Date: Mar 2004
Location: NY
Posts: 186
Quote:
Originally Posted by Alister Chapman View Post
All traditional lenses will breathe to greater or lesser extent as focusing is achieved by moving the front lens element forwards and backwards. Most of the lower cost HD lenses breathe quite a lot. The ex lenses don't breathe as focusing is done by electronicaly moving the some of the rear lens elements.
First time I saw this in EX I was very impressed. Even the 70x sports lenses I put together sometimes breathe and ramp. If that's how EX does it I wonder why nobody else hasn't employed it. Sounds like a simple enough idea. How is the ramping eliminated?
Max Allen is offline   Reply With Quote
Old July 29th, 2009, 06:40 PM   #5
Major Player
 
Join Date: Jun 2008
Location: melb.vic.au
Posts: 447
It does ramp, but the F-Stop reading doesn't show it. From about 10mm it ramps up from F1.9 to F2.8.

Zoom in on something, and your spot meter doesn't move until you pass F2.8.
__________________
www.davidwilliams.com.au
David C. Williams is offline   Reply With Quote
Old July 29th, 2009, 07:08 PM   #6
Vortex Media
 
Join Date: Jan 2009
Location: New England, USA
Posts: 2,484
The Fujinon HSs18x5.5 lens that I use on my EX3 has no noticeable breathing or ramping at all. Unfortunately, it is a $12,000 lens.

To dispute a thread on another forum (that shall remain nameless) about breathing with Nikon lenses, I did this quick test to show that breathing is not a problem using the Adaptimax and quality Nikon lenses.

Adaptimax Lens Breathing Demonstration on Vimeo
__________________
Vortex Media http://www.vortexmedia.com/
Sony FS7, F55, and XDCAM training videos, field guides, and other production tools
Doug Jensen is offline   Reply With Quote
Old July 30th, 2009, 02:52 AM   #7
Inner Circle
 
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
Doug I would suggest that your clip show quite a lot of breathing. The tree on the left moves a long way in to the left as it comes in to focus. I think what the clip shows is that the shallow depth of field created by the long focal length hides the breathing.
__________________
Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com
Alister Chapman is offline   Reply With Quote
Old July 30th, 2009, 06:12 AM   #8
Vortex Media
 
Join Date: Jan 2009
Location: New England, USA
Posts: 2,484
That's not breathing. That's a side effect of the FCP smoothing filter I applied. I'll try to post the unfiltered footage when I can. The Nikon lenses don't having any noticable breathing that would prevent racking focus.
__________________
Vortex Media http://www.vortexmedia.com/
Sony FS7, F55, and XDCAM training videos, field guides, and other production tools
Doug Jensen is offline   Reply With Quote
Old July 30th, 2009, 11:54 AM   #9
Inner Circle
 
Join Date: Aug 2006
Location: Poland
Posts: 4,086
I can't wait for your unfiltered footage, Doug. Because like Alister, I can see a lot of breathing on the tree trunk!
__________________
Sony PXW-FS7 | DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive
Piotr Wozniacki is offline   Reply With Quote
Old July 30th, 2009, 05:42 PM   #10
Vortex Media
 
Join Date: Jan 2009
Location: New England, USA
Posts: 2,484
I uploaded a new version without smoothing. Whatever movement you see is due to the wind and my shakey hands. This particular lens is not very easy to rack focus.

This version o fhte video is HD and I added a grid to make it easier to see that there is virtually no breathing. I won't go so far as to say "none" even though I don't see any. Every lens probably has some breathing.

The point of this video is that Nikon SLR lenses do no exhibit any more breathing than any other lens. I know that is a true statement.

http://vimeo.com/5515816
__________________
Vortex Media http://www.vortexmedia.com/
Sony FS7, F55, and XDCAM training videos, field guides, and other production tools
Doug Jensen is offline   Reply With Quote
Old July 31st, 2009, 01:48 AM   #11
Inner Circle
 
Join Date: Aug 2006
Location: Poland
Posts: 4,086
Thanks Doug.

I guess it's comparable to the extent of breathing I'm getting from my Canon FD 50/1.4 I use with Letus adapter.

It's certainly less distracting than with my Canon FD zoom lens - but that's to be expected.
__________________
Sony PXW-FS7 | DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive
Piotr Wozniacki is offline   Reply With Quote
Old August 1st, 2009, 07:37 AM   #12
Regular Crew
 
Join Date: Mar 2004
Location: NY
Posts: 186
So electronic movement of the rear lens element which eliminates the breathing is how EX performs the backfocus it appears. That's interesting. I'd still prefer manual backfocus vs. "auto" backfocus however.
Max Allen is offline   Reply With Quote
Old August 1st, 2009, 02:03 PM   #13
Major Player
 
Join Date: Nov 2005
Location: Crestline, California
Posts: 351
Back focus on EX-3

The first time I ran the auto back focus on my EX-3 I almost ruined a shoot I was doing the next day. It left the back focus so very far off that I had to work around it by pretty much avoiding any zooms.

So I made a giant back focus target (four pieces of paper taped together) and ran it on that. It gave great results, and it was kind of fun watching the thing happening.

I don't have the photoshop file on this computer, but if anyone wants to email me at tipsd9video@msn.com I can send it later. I did it in photoshop as I recall, but it would be even better in a vector graphics program like Illustrator or Corel.

Tip
Tip McPartland 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 XDCAM EX Pro Handhelds

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:10 PM.


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