ny HVR-Z7 with a lot of grain in the picture at DVinfo.net

Van Hove Dimitri · August 3rd, 2009, 01:23 PM

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.

Rob Morse · August 3rd, 2009, 07:43 PM

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.

Van Hove Dimitri · August 4th, 2009, 02:10 AM

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.

Tom Hardwick · August 4th, 2009, 02:53 AM

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.

Van Hove Dimitri · August 4th, 2009, 04:56 AM

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

Gary Nattrass · August 5th, 2009, 01:15 AM

The pictures look OK to me and what I would expect from a Z7 I dont think they are too grainy at all.

Mike Paterson · August 5th, 2009, 05:18 AM

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.

Gary Nattrass · August 5th, 2009, 05:57 PM

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.

Bryan McCullough · August 8th, 2009, 04:43 PM

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

August 3rd, 2009, 01:23 PM	#1
Van Hove Dimitri 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.

August 5th, 2009, 01:15 AM	#6
Gary Nattrass Trustee Join Date: Apr 2008 Location: Cornsay Durham UK Posts: 1,992	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/

August 5th, 2009, 05:18 AM	#7
Mike Paterson Regular Crew Join Date: Jul 2005 Location: London, UK Posts: 99	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

August 5th, 2009, 05:57 PM	#8
Gary Nattrass Trustee Join Date: Apr 2008 Location: Cornsay Durham UK Posts: 1,992	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/

August 3rd, 2009, 07:43 PM	#2
Rob Morse Major Player Join Date: Feb 2009 Location: Charlotte, NC Posts: 427	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.

August 4th, 2009, 02:10 AM	#3
Van Hove Dimitri 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.

August 4th, 2009, 02:53 AM	#4
Tom Hardwick 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.

August 4th, 2009, 04:56 AM	#5
Van Hove Dimitri 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

August 8th, 2009, 04:43 PM	#9
Bryan McCullough 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