D90 scrolling waves at DVinfo.net

Johnnie Behiri · October 5th, 2008, 04:29 PM

Dear PAL countries users.

Please be aware that the camera is producing severe scrolling waves due to non-synced shutter when shooting under artificial light.

It makes it completely useless for any night scenery shots, pro lighting (or just fun home videos).

Here are two samples (until I will upload my own).

Nikon D90 non-synced shutter issues (and tissues) on Vimeo (look from second 30 on),
Search videos for d90 neon on Vimeo

Hope to get 25p and 50Hz shutter in future updates to overcome this problem.

Thanks.

Johnnie

Jerome Marot · October 5th, 2008, 11:39 PM

You will only get 50Hz shutter if the hardware supports it, which is not a given. For the video to be possible, the chip has to be made in a special mode where it scans a lower resolution. This mode may be only specified on this timing, or the clocks which drive the chip may not be built to produce the necessary timings.

See for example this document:
http://www.sony.co.jp/~semicon/engli...1/a6809671.pdf
at page 11. It is a much older chip, but that is a reference I could easily find, and more recent chips work in a similar manner.

Roy Beazley · October 5th, 2008, 11:41 PM

Dude that low light looks great.... but that banding kills it...

Carl Ny · October 6th, 2008, 12:03 PM

Also saw it on my D90, should be the same with Canon 5DII...or?
Maybe a Firmware...I hope...

Though really small and nice 35mm package to bring when ever...
Interesting times!

October 5th, 2008, 04:29 PM	#1
Johnnie Behiri Regular Crew Join Date: Apr 2003 Location: Vienna/Austria Posts: 187	D90 scrolling waves Dear PAL countries users. Please be aware that the camera is producing severe scrolling waves due to non-synced shutter when shooting under artificial light. It makes it completely useless for any night scenery shots, pro lighting (or just fun home videos). Here are two samples (until I will upload my own). Nikon D90 non-synced shutter issues (and tissues) on Vimeo (look from second 30 on), Search videos for d90 neon on Vimeo Hope to get 25p and 50Hz shutter in future updates to overcome this problem. Thanks. Johnnie Last edited by Johnnie Behiri; October 5th, 2008 at 04:30 PM. Reason: 1

October 5th, 2008, 11:39 PM	#2
Jerome Marot Regular Crew Join Date: Jul 2006 Location: Munich (Germany) Posts: 107 Images: 4	You will only get 50Hz shutter if the hardware supports it, which is not a given. For the video to be possible, the chip has to be made in a special mode where it scans a lower resolution. This mode may be only specified on this timing, or the clocks which drive the chip may not be built to produce the necessary timings. See for example this document: http://www.sony.co.jp/~semicon/engli...1/a6809671.pdf at page 11. It is a much older chip, but that is a reference I could easily find, and more recent chips work in a similar manner.

October 5th, 2008, 11:41 PM	#3
Roy Beazley Regular Crew Join Date: May 2004 Location: tampa fl Posts: 92	Dude that low light looks great.... but that banding kills it...

October 6th, 2008, 12:03 PM	#4
Carl Ny Regular Crew Join Date: Oct 2004 Location: World wide Posts: 77	Also saw it on my D90, should be the same with Canon 5DII...or? Maybe a Firmware...I hope... Though really small and nice 35mm package to bring when ever... Interesting times!