ny HVR-Z7 with a lot of grain in the picture 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-Z7 / HVR-S270

Sony HVR-Z7 / HVR-S270
Handheld and shoulder mount versions of this Sony 3-CMOS HDV camcorder.


Reply
 
Thread Tools Search this Thread
Old August 3rd, 2009, 02:23 PM   #1
Tourist
 
Join Date: Jul 2009
Location: Belgium
Posts: 4
ny HVR-Z7 with a lot of grain in the picture

I own a hvr-z7 and the picture i get has a lot of grain in it (noise)...
In the dark and the light area's,n anal or ut....
Just show this example
http://www.digitaleregioaalst.be/jippen/sonyhvrz7.m2t

Do i have some wrong settings , or is there a problem with the camera?
Does someone have the same cam and can post some examples ( .m2t) ?(traid from the cam.
Thanks for the help.
Van Hove Dimitri is offline   Reply With Quote
Old August 3rd, 2009, 08:43 PM   #2
Major Player
 
Join Date: Feb 2009
Location: Charlotte, NC
Posts: 425
You might want to put it on Vimeo, not many people are going to download 100mb files just to look. Anyway, without you clarifying what settings you're shooting with it's going to be hard for anyone to help you. Are you shooting in auto? What is your gain on? The outside shot at the end looked good.
Rob Morse is offline   Reply With Quote
Old August 4th, 2009, 03:10 AM   #3
Tourist
 
Join Date: Jul 2009
Location: Belgium
Posts: 4
Ok wil post it later on vimeo.

The settings are in manual and in auto.
Shutter speed on 1/50 and gain 0db or -3db
Picture profile OFF.
Is it also normal when you shout in the wide stand , that a square table gets round ? (barrel disortion) see the table at the end.
Van Hove Dimitri is offline   Reply With Quote
Old August 4th, 2009, 03:53 AM   #4
Inner Circle
 
Join Date: Mar 2003
Location: Billericay, England UK
Posts: 4,711
In auto (in other words if the gain isn't being shown in the v'finder display) then it's allowed to roam. If you had the ND filters in place and a small aperture selected, then of course the gain could go right up to +18dB. Replay the footage with 'display' turned on and check out the gain that was applied on these grainy sections.

The barrel distortion you're seeing is perfectly normal with any cheep-ish 12x zoom. Frame up your 16:9 TV screen surround and see how bendy it looks. I wince when my Z1 has straight lines at the edges of my frame.

tom.
Tom Hardwick is offline   Reply With Quote
Old August 4th, 2009, 05:56 AM   #5
Tourist
 
Join Date: Jul 2009
Location: Belgium
Posts: 4
Ok thanks for the info.
I see the gain at the screen. and it says 0db.
Called the dealer, he thinks its not normal(something with the sensors) he will ship the camera to a sony repair center to take a look at it.

on vimeo
test from hvr-7z on Vimeo

and from my garden
Tuin on Vimeo
Van Hove Dimitri is offline   Reply With Quote
Old August 5th, 2009, 02:15 AM   #6
Trustee
 
Join Date: Apr 2008
Location: Cornsay Durham UK
Posts: 1,940
The pictures look OK to me and what I would expect from a Z7 I dont think they are too grainy at all.
__________________
Over 15 minutes in Broadcast Film and TV production: http://www.imdb.com/name/nm1044352/
Gary Nattrass is offline   Reply With Quote
Old August 5th, 2009, 06:18 AM   #7
Regular Crew
 
Join Date: Jul 2005
Location: London, UK
Posts: 98
I find the Z7 pretty noisy. When I first got the camera I was surprised by the amount of noise too, particularly in the shadows, and sent it back. The replacement was just the same. Unfortunately most cameras in this price range suffer from what, for me at least, is excess noise - I shoot at -6db as much as possible as I find the crawling shadows pretty unpleasant at 0db and above. It's an issue that's been conveniently ignored by the manufacturers. I think they'll have to address it soon, particularly now you can shoot images with such rich clean shadows on cameras half the price, such as the Canon 5D MKII.
__________________
www.pfilm.co.uk
Mike Paterson is offline   Reply With Quote
Old August 5th, 2009, 06:57 PM   #8
Trustee
 
Join Date: Apr 2008
Location: Cornsay Durham UK
Posts: 1,940
I really notice it now that I am on P2 with an HPX301 as well, the HDV pictures look very grainy in comparison, I am sure the codec is to blame as the P2 AVC 100 intra pics look very clean even in low light at -3db.

I suppose at the end of the day you pays your money and just have to accept the compromises of whatever camera you use.
__________________
Over 15 minutes in Broadcast Film and TV production: http://www.imdb.com/name/nm1044352/
Gary Nattrass is offline   Reply With Quote
Old August 8th, 2009, 05:43 PM   #9
Major Player
 
Join Date: Oct 2003
Location: Richardson, TX
Posts: 842
I had the same initial reaction when I got my Z7U.

http://www.dvinfo.net/conf/sony-hvr-...e-worried.html

Since then I've tweaked the camera settings and run in -6db and have been very pleased with the images.

Here's a shoot I did that I think looks pretty clean even with all the dark areas.

Eli's Story on Vimeo
Bryan McCullough 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-Z7 / HVR-S270

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:43 AM.


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