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The last part of the Exposure triangle is ISO.
Your ISO determines how sensitive your camera is to light.
So a low ISO( say 100-400) would be used when you’ve got a lot of light. Like you are outdoor on a sunny day or you’ve got lots of studio or natural light in your house.
A HIGH ISO( 1600 and above) would be used in low light situations. Like my house, or a concert, art galleries, churches.
So the obvious thing would be to just crank up your ISO if you get into a low light situation where no matter how wide your aperture is or how slow your shutter speed is, you still get a dark photo.
But whoooo nelly!
You have to be careful with those high ISOs! They lead to grainy or low quality photos like this….
Now, you have a choice. You can embrace the grain like I did here….
So that my friend is the exposure triangle. It’s like the holy trinity of photography: they all work together. None is independant. You have to consider them all when you stop to take a photo.
So how do I start?
First, I ask myself: How much light do I have?
I personally, always set my ISO FIRST. That’ s just me. If I’m in my house, I start high. around 1600. If I’m outdoors, I start at 100 and go up if necessary.
Next, I think about what I want my photo to look like. Do I want my background all blurry? Do I want everything in focus? Or do I want to focus on just ONE detail? Once I’ve decided that, I set my aperture.
Finally, I look at my shutter speed. What am I photographing? Pookah? A plant? C-Dub? how much light do I have? I try to keep my Shutter speed at or around 1/125. Or at least start there. But usually, my shutter speed falls into place based on my other settings. And if I can’t get my shutter speed up to 1/125, I can usually adjust my ISO and it magically makes it better!
And that’s it for the exposure triangle. The only way to get better is to practice practice practice! I’m still working on it!!
Stay tuned for next week. Now that I’ve got the basics out of the way, we’ll talk about White Balance and Metering.
See you next time!