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New Contributor
Posts: 2
Registered: ‎05-03-2013

MKIII video noise

So first off I should state that although I have had this camera for just under a year I am very new to the DSLR video world (this is my first "real" camera) so please forgive my ignorance or stupidity haha. Anyhow, up until recently I have been able to get really clear video even at higher ISO but for some reason lately, even at lower ISO settings, my video just seems way too grainy and I cant seem to figure out why, I havent changed settings or anything. 

 

If anyone has any tips to try or knows of something that might be malfunctioning or wrong with the camera, tips would be greatly appreciated

 

Thanks

Frequent Contributor
Posts: 72
Registered: ‎02-07-2013

Re: MKIII video noise


@ryang1 wrote:

So first off I should state that although I have had this camera for just under a year I am very new to the DSLR video world (this is my first "real" camera) so please forgive my ignorance or stupidity haha. Anyhow, up until recently I have been able to get really clear video even at higher ISO but for some reason lately, even at lower ISO settings, my video just seems way too grainy and I cant seem to figure out why, I havent changed settings or anything. 

 

If anyone has any tips to try or knows of something that might be malfunctioning or wrong with the camera, tips would be greatly appreciated

 

Thanks


Hi and welcome!

 

I'd like to mention some aspects that may affect the image quality you get from your camera (in stills and video), maybe you can check them and find your problem:

 

- Sensor heating: Every camera has a sensor, obviously. If you shoot in Live View mode (on which the sensor is always exposed and working), or do "long exposures" stills for long time, your camera' sensor will heat up (faster if you shoot under hot weather conditions).

 

This must always be kept in mind. For this reason is highly recommended to let the camera cool down after those kind of shots or long use (turning it off, for instance).

 

- ISO settings: It's widely known that there are specific ISO settings that deliver noiser images than others.

 

The real native ISOs of the camera are 200, 400, 800, 1600, etc. Although some people have called "native" to the ISO settings mentioned below due to their lower noise levels.

 

To be clear, if you want to get the less noisy images, you should select ISO multiple of 160. This means: 160, 320, 640, 1250, 2500. The technical reason is because the camera do a digital pull down of the next upper ISO level, with the side effect of reducing noise. This has a down side effect though: you loose a bit of information/dynamic range on the highlights (that may end up clipped easier than in other ISOs), so you have to be careful in this regard. Test and check it by yourself.

 

As the opposite reason, avoid using ISO settings multiple of 125 (125, 250, 500, etc.) because the camera do a digital push of the ISO below it, resulting in an increase of noise.

 

The noise is always lot easier to see on dark areas. Light areas won't be affected much.

 

- Special Camera settings: There are some features/functions that will indeed affect the noise in your image.

 

These are: Auto Lighting Optimizer and Highlight Tone Priority.

 

They're great functions, but you should knowing their utility and limitations, and use with caution. Please refer to the manual for an explanation of each one.

 

- Picture Styles: ALL pictures and videos taken with the Canon cameras are processed through what is called Picture Styles.

 

Usually the included built-in camera picture styles won't affect much the noise quantity on your shot (although they will certainly change the look of your stills & video, and may deliver different "banding" in strong gradient areas like deep blue sky, etc.).

 

BUT there are some 3rd party picture styles available for download (some of them mainly aimed for post-production, called "flat" picture styles, etc) that can really affect the noise on the final captured image/video. So be aware and check them before and important job.

 

Hope this helps!

 

Regards.

HD Cam Team
Group of photographers and filmmakers using Canon cameras for serious purposes.
www.hdcamteam.com | www.twitter.com/HDCamTeam | www.facebook.com/HDCamTeam
New Contributor
Posts: 2
Registered: ‎05-03-2013

Re: MKIII video noise

OK thanks, this is helpful, hopefully its just a matter of one of these issues and not something internal with the camera itself. I remember hearing at some point or another that different ISO's produced noisier images but that has since been lost on me, so thanks, i definitely havent been paying attention to that.

New Contributor
Posts: 4
Registered: ‎08-20-2015

Re: MKIII video noise

I am getting grain in shadowed areas in really good ligh at low ISO. The perfectly lit areas are crystal clear but the slightly darker, shadowed areas have significant grain. Could this be due to using the wrong ISO multiples? I am clueless. Any help would be appreciated

Reputable Contributor
Posts: 754
Registered: ‎11-14-2012
New Contributor
Posts: 4
Registered: ‎08-20-2015

Re: MKIII video noise

Thanks so much! So If i use the 160 multiples in regards to ISO then grain in dark areas should not occur? So it's normal to see one shot with both crystal clear areas and grainy areas. I guess I thought that if it was an ISO issue then the grain would be a bit more uniform over the whole shot not just selectively...
Highlighted
Reputable Contributor
Posts: 754
Registered: ‎11-14-2012

Re: MKIII video noise

Do you have any example?

New Contributor
Posts: 4
Registered: ‎08-20-2015

Re: MKIII video noise

I do! Here's a link to a clip from the footage that started this whole thing. There is even some grain in his jacket! Shouldnt this 6D footage be rediculousely clear? Other 6D footage that I have seen IS. That's specifically why I bought this camera. Thanks SO much for any insight that you can give.

New Contributor
Posts: 4
Registered: ‎08-20-2015

Re: MKIII video noise

https://youtu.be/WXjzxHYNTQw sorry... forgot the link!

Reputable Contributor
Posts: 754
Registered: ‎11-14-2012

Re: MKIII video noise

In that link it says ISO 400-500. Especially ISO 500. But actually I don't think that noise bother.
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