NOISE SIMPLIFIED, WHAT CAUSES IT, HOW TO REMOVE IT!

I explain exactly what causes the noise in your images, how you can reduce it, and I address the misconception that ISO directly causes noise. I also look into how noise reduction allows us to use higher shutter speeds. I hope you find it helpful. Cheers, Duade
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Chapters
00:00 What Causes Noise?
00:52 ISO Does Not Cause Noise
02:06 What ISO For Wildlife
03:33 How Sensor Gets Light
04:11 Aperture
05:49 Shutter Speed
06:32 Light Value
08:29 Sensor Size & Type
09:35 Noise Reduction
11:56 40D & 400 5.6L
14:31 Highest ISO
15:41 Conclusion
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[przybylskipawel]

Technically the lack of light is not causing noise but it is causing worse signal to nosie ratio. As a result to increase signal to viewable level you also have to increase the noise. Also. Camera does not amplify the light. If it did we wouldn't have problem with noise. It amplifies the signal recorded based on gathered light. This signal however already contain noise and they are both recorded. At first it amplify electrically the signal and part of the noise. Above some ISO it just increase the signal digitally amplifying the signal and all the noise. That is why it is better to set your ISO to achive right exposure up until the point when it doesn't matter any more.

[juggernaut]

I've watched many of Duade's videos. He is one of the most skillful communicators on YouTube. I've become a much better photographer because of him because I now actually understand the theory of what I'm doing. He obviously puts an incredible amount of thought, time and effort into them...and they're available for free! Many thanks.

[kenthompson]

I have been a photographer for years and this is the best video I have ever seen on how to get light to the sensor. Best explantion of the relationship of Aperature, shutter speed and ISO. Thanks Duade, I shared this with my brother in law who is just beginning his journey in photography.

[Twobarpsi]

Great explanation! The window analogy really demonstrates the effect of aperture!

[paulasimson]

This is the best explanation of image noise I've ever seen. You're a born educator, Duade.

[charlesfisher]

I just pulled out my 40 old D. I used a 77D but love that 40. It's like a classic car.
Love your shows.

[benoutside]

Thanks for the video! I had never really tried noise reduction software until Lightroom recently added the recent update. It has become a game changer for me. I used to worry about high ISOs and was disappointed when my photos looked noisy. I had heard about Topaz, but just wasn’t ready to spend the money on it. Thankfully, Lightroom added the noise reduction feature to my current program. I have used it for several weeks now and been very pleased with the results. It would be interesting to see how the different noise reduction softwares compare. Thanks again for the video!

[JohnCooper-jlnt]

Loved the technical explanations and found the content helpful I’m a topaz De Noise user. Thank you.

[lachlangraham]

Hi Duade, great video again. I use Topaz after watching an earlier video of yours, it is now a default part of my workflow. It has cleaned up images from my 6D and legacy shots from my old 1000D. I use ISO up to 12800 on the 6D no problem. It was a game changer for me.

[msyuan]

Combined with the comments, great presentation, as always. Thanks!

[aslisekhon]

Very helpful as i got great shots today but very noise this will definitely help

[RVNmedic]

Quite a few really technical comments. Bottom line is your explanation was simple and straight forward. Outstanding review. How do you determine LV?

[bobforgas]

Best explanation of noise I've ever heard.

[davidfelber]

Fabulous, as always. By the way, your front yard is absolutely lovely! Thank you so much. PS This video is also a great argument for buying older used gear, which is what I use. 7D Mark II with a 400mm f/5.6 or a 500mm f/4 version I (both fabulous old lenses). Topaz Denise AI with Lightroom makes many things possible.

[ahmedbebars]

I was always a bit reluctant to use those noise reduction programs as I was afraid that they'll smoothen detail and decrease overall sharpness, but now I'll give them a try, I got nothing to lose.

[wanneske]

You are so right ! Aperture and shutter speed are physical parameters that determine the amount of light on your sensor, whereas Iso is something electronical or software.

[TomazNMelo-tfsc]

The most important thing to improve my photography was when I discovered one video in your channel that you talk about Topaz Denoise and them I started to use DxO PureRaw and I can't believe how my photos become better and also now I always got much more sharp photos just because I can use higher iso and increase my shutter speed. On that point I become a fan of your channel and I never miss a new video.

[youritguy]

I was doing some research on how shutter and ISO affect image noise and came across your channel. I use the Denoise feature in Lightroom a lot, but your video helped me feel more confident using it. After all, the most important thing is getting the shot.

[pseudophotog]

Many thanks for this clear and simple explanation Duade

[julioamaral]

Many thanks, Duade! High quality information! Technical and practical, supported by evidence.
My R5 just arrived! Going to South Georgia next Oct. Always learning from you. Best from South Brazil.