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View Full Version : GH1 jello vs D90?



modernPrimitive
05-06-2009, 08:26 AM
Hi,

Has anyone compared the Jello effect on the GH1 to the D90, 5D, EX1 etc?

I got myself a D90 a few weeks ago and the jello is so bad it's completely unuseable (in my books anyway). I thought a good solid tripod would eliminate the problem but when shooting closeups (portrait) if someone just nods or moves their head around (in a natural conversational way)", the squash and stretch" makes the footage completely unusable.

Anyway, so I was wondering if the Jello on the GH1 is an improvement over the D90 (and are there any decent video samples out there - I haven't been able to find any info or clips on this)?

(If Nikon don't release a firmware upgrade for this there'll be a good deal on eBay on a D90 pretty soon!)

Thanks,
mP

Ian-T
05-06-2009, 08:27 AM
As stated by some users...it is comparable to Red One sekw.

Isaac_Brody
05-06-2009, 08:30 AM
Rolling shutter test ==> http://www.dvxuser.com/V6/showthread.php?t=170043 (http://www.dvxuser.com/V6/showthread.php?t=170043)

And tons of clips to sift through ==> http://www.dvxuser.com/V6/forumdisplay.php?f=179

Rolly
05-07-2009, 03:58 AM
I'm far to be a pro, but I think I made good use of the D90, the "Jello effect" never was a deal breaker for me, most of the time I shot handeld, monopod or DIY steadicam (only use a tripod once for my chromakey test).

I will buy the GH1, thats a sure thing, because of the full manual control and of course 1080p. I'm sure I will be able to jump around while shooting without the infamous jello effect :shocked:

EEG
05-07-2009, 04:19 AM
could anyone explain to a non-English reader, what jello exactly means?

Rolly
05-07-2009, 05:01 AM
could anyone explain to a non-English reader, what jello exactly means?


It's the rolling shutter artifact that some people call the "jello effect", it happen when you move the camera to fast while panning, the picture move like Jello.

chameloon
05-07-2009, 05:09 AM
http://3baidsblog.files.wordpress.com/2008/05/jello.jpg

Jello is a gelatine dessert. The "Jelo effect" is a comparaison from the movement made by the dessert when you shake the plate :) Hope this helps

PaPa
05-07-2009, 05:25 AM
Hi,



I got myself a D90 a few weeks ago and the jello is so bad it's completely unuseable (in my books anyway). I thought a good solid tripod would eliminate the problem but when shooting closeups (portrait) if someone just nods or moves their head around (in a natural conversational way)", the squash and stretch" makes the footage completely unusable.


mP


Sounds like you should bring your subjects to the hospital if you're getting these results. Jello head is a serious condition and should be treated right away with large spoons.


On a more serious note, you should only really be noticing that if the camera is moving, not as much when subjects move.

URod
05-07-2009, 05:33 AM
Hi EEG,

look at:

http://www.nikonblog.de/d90/video-tipps-56/

the video under the headline: Tipp 1: Nicht aus freier Hand

EEG
05-08-2009, 03:35 AM
many thanks to all for enlighten me about jellowing. Must be somthing like stuttering or uneven presentation of movement. It seems that this is not only caused by the quality of compression in the camera but also by the codec used for the display of movement on TV or PC/Mac. Often this is not clearly discerned in the discussions. Thanks again.

Martti Ekstrand
05-08-2009, 05:30 AM
The jello effect talked about here is due to a 'rolling shutter', ie; the whole of the sensor is not sampled at the same instant per frame but from top to bottom (or bottom to top). The slight difference in time creates artifacts like the image skews when panning fast or a face bends if the person turns the head quickly. If you have a flat bed scanner you can see this effect by moving the paper while scanning.