The tutorials have to be the BEST I've found! Thanks for your efforts. I have the G9 and Lumix 400 so you have inspired me to do much greater things with them.

Thank you Andrew! Your Photography School series is great.

Thanks Andrew - great video

Thank you, Andrew very helpful

Great video again. I too have been using ISO 200 whenever possible to reduce the noise although that is not always possible. Where I live, I have a tree canopy problem in my yard so, for flying bird shots, I have to bring up the ISO and can sometimes get a lot of noise in my photos. I work to take it out with LR or Luminar but not to a great extent is that possible. Again an excellent video and well explained. With your help my pictures have been improving. I did a lot of 16mm movie work on top of the water and underneath with a K100 in the 60s and 70s and then later with a Nikonis camera for stills. Keep up the good work.

Excellent explantation and a great help especially to beginners

It's all about the signal to noise ratio. Every sensor, regardless of size, has inherent self noise. It's a function of being an electronic device. There is no such thing as a completely silent electronic system. Just the electricity running through the components causes noise. As you pointed out with a radio, the reduced audio signal being captured by your receiver when it isn't exactly tuned to the frequency, or is too far away from the broadcast tower to receive a strong signal, is represented as audible static. The more accurately you tune to that frequency or the closer you get to the source of the signal, the stronger it is. You'll hear far less static underneath the broadcast. That's signal to noise ratio. The stronger the signal, the greater the distance between the signal being processed and the underlying noise of the system itself. In a camera, turning up the ISO is turning up the gain. You are electronically boosting the signal being received. Your signal is light. The more light the sensor receives, the stronger the signal, and therefore, the less it has to be boosted. You've got a very good signal to noise ratio and the image processor can very easily distinguish the image component of the signal from the background noise component. In low light situations (regardless of whether the low light is caused artificially by using a very high shutter speed or closing the lens aperture), the signal is very weak. This means the signal to noise ratio is very small. By turning up the ISO, you are boosting the entire signal - noise and all. When the image processor goes to work on that boosted signal, it has a hard time differentiating what is "image" and what is "noise". Because it can't accurately represent the image information, you get the grain - which is, in effect, static. A common misconception is that ISO itself is the cause of noise. That's wholly inaccurate. The cause of noise in an image is a low signal to noise ratio. ISO doesn't cause that, lack of light does.

Wow. This is so helpful. I have finally seen the light! (Pun intended)

Explained so well Andrew. Wish I had these videos when I was starting out!

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Some animals in your videos are very familiar, guess you spend a bit of time at Australia Zoo?

So what would be the difference between increasing the ISO, or taking an underexposed picture and increasing the brightness in photoshop? In both case you are electronically increasing the brightness, right?

What about using flash combined with all of this.....Do you have any videos using flash?

Great pics and explanation. Hey I'm wondering if you would like to get some of my instrumental songs to put on your videos, I would appreciate to see my work there :) waiting for the feedback

I love your channel... just a minor correction... the term "ISO" is pronounced 'ee-so' or 'ay-so'... not I... S... O... 😊👍🏼...

I’m scared of ISO. Suppose noise reduction software works.