Vignette problem 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 November 20th, 2007, 04:44 PM   #1
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
Vignette problem

I've noticed that my EX1 is suffering from a vignette problem whilst in the mid zoom ranges. Have a look at the top left corner in these screen shots, you can see it's fine at each end of the scale, but throughout the middle ranges it appears.

This is happening with the IRIS fully open and in low light if that makes any difference.

Can this be solved?
Attached Thumbnails
Vignette problem-exvin1.jpg   Vignette problem-exvin2.jpg  

Vignette problem-exvin3.jpg   Vignette problem-exvin4.jpg  

__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 04:52 PM   #2
Major Player
 
Join Date: Feb 2006
Location: Philadelphia
Posts: 795
not encouraging - Adam Wilt mentioned this in his review of the pre-release model here:

http://www.uemedia.net/CPC/cinematog...le_16640.shtml

Quote:
There is vignetting at wide apertures from 10mm onwards, but Sony tells me that it's due to a bug in this engineering sample's auto-focus system, so I'll refrain from further commentary until I have a production model to work with.
__________________
My latest short documentary: "Four Pauls: Bring the Hat Back!"
Evan Donn is offline   Reply With Quote
Old November 20th, 2007, 04:54 PM   #3
Trustee
 
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 1,896
What the...
That's odd it's in one corner! Also in mid travel?
Wow, we need to tests these cam as soon as possible.
This should not be happening.
Why one corner?

I thought I read that in Wilt's article for the pre-ex1..... hmmmm.
Sony is going to have A LOT of upset buyers, or not buyers.
Steven Thomas is offline   Reply With Quote
Old November 20th, 2007, 04:57 PM   #4
Inner Circle
 
Join Date: Feb 2004
Location: Brooklyn, NY, USA
Posts: 3,777
Try shooting something with a solid color. It might make it more obvious.
Note, Adam's comments mention this specific it wide apertures at 10mm on so this seems like a different issue.
Craig Seeman is offline   Reply With Quote
Old November 20th, 2007, 04:57 PM   #5
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
Yup, well they'll certainly be getting this one back :(
__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 05:00 PM   #6
Trustee
 
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 1,896
It's as if something is hanging on the edge of the optical path.
Steven Thomas is offline   Reply With Quote
Old November 20th, 2007, 05:02 PM   #7
Inner Circle
 
Join Date: Feb 2004
Location: Brooklyn, NY, USA
Posts: 3,777
Are you using any kind of clear or UV filter on the front?

Maybe you can slow zoom through and see something that might indicate what/why this is happening.
Craig Seeman is offline   Reply With Quote
Old November 20th, 2007, 05:06 PM   #8
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
In order to do a solid colour one I need more light and a larger area, I'll try it tomorrow against a wall.

No, there is not a filter attached.
__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 05:10 PM   #9
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
Quote:
Originally Posted by Craig Seeman View Post
Note, Adam's comments mention this specific it wide apertures at 10mm on so this seems like a different issue.
he says "from 10mm onwards" That sounds the same to me as the aperture is fully open.
__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 05:10 PM   #10
Trustee
 
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 1,896
Paul, I'm sorry to hear this. Looking at the stuff posted on the FTP site I do not see this issue.
I would contact my dealer as soon as possible and get the next one before they send it out to someone else. I know these cameras are going to be hard to get.
It sounds like Craig is right, this seems like a different issue from Wilt's pre-model.
Steven Thomas is offline   Reply With Quote
Old November 20th, 2007, 05:11 PM   #11
Inner Circle
 
Join Date: Feb 2004
Location: Brooklyn, NY, USA
Posts: 3,777
To me it also has a blue cast rather than a simple darkening in the corner. That's why I'm not sure if it's a vignette problem or something that's manifesting itself in such a fashion that it can be mistaken for a vignette problem.

Maybe try various aperture settings as well as macro function and see if it's a lens aberration of some sort.
Craig Seeman is offline   Reply With Quote
Old November 20th, 2007, 05:22 PM   #12
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
Quote:
Originally Posted by Craig Seeman View Post
To me it also has a blue cast rather than a simple darkening in the corner
No, I think the blue is coming from my mac screensaver, it is a reflector after all :)

I've attached a small clip.
Attached Files
File Type: mov ex-vig.mov (173.4 KB, 4758 views)
__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 05:34 PM   #13
Trustee
 
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 1,896
So other than the "real" let down with your problem, how was the footage, short of the no light high gain?
Steven Thomas is offline   Reply With Quote
Old November 20th, 2007, 05:40 PM   #14
Major Player
 
Join Date: Mar 2007
Location: Norfolk, UK
Posts: 627
Quote:
Originally Posted by Steven Thomas View Post
So other than the "real" let down with your problem, how was the footage, short of the no light high gain?
I haven't really spent long enough with the camera to say, my initial tests were just sitting with the camera experimenting with the camera a 12db gain (it's default high setting) and they looked much brighter than the actual room did, but obviously looked grainy too. It's definitely a lot more sensitive than my A1. I'd to try and get some nice shots but I think it's going to have to go back to the supplier, I'm certainly not waiting for Sony to fix it when it's been like this from delivery.
__________________
Blog: www.pauljoy.com
Company: www.videotrader.co.uk
Paul Joy is offline   Reply With Quote
Old November 20th, 2007, 05:42 PM   #15
Inner Circle
 
Join Date: Feb 2004
Location: Brooklyn, NY, USA
Posts: 3,777
I see it starts at about frame 55 or at least that's when I see it encroach. It still doesn't look like a "typical" vignette issue to me since it doesn't seem to happen at other corners.

Do try it against an evenly lit surface when you get the chance.

It's really predominate in the upper left. I don't really notice it at the other corners.

Quote:
Originally Posted by Paul Joy View Post
No, I think the blue is coming from my mac screensaver, it is a reflector after all :)

I've attached a small clip.
Craig Seeman 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 10:00 AM.


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