Today's 31 Days to a Better Photo lesson covers the ISO. I learned the shutter and the ISO work together to "control the amount of light gets to the sensor" of my camera. I learned the best way to think of ISO is to think of light receptors. The more receptors, the more light comes in.
There is a downside to having a large ISO: quality deterioration. You increase the amount of "noise", which we would understand as grainy. A low ISO picture would have a crisp clarity, a high picture would have lots of grain.
We've always had a problem. Our sons have gone/are going to a preschool and most of the programs are inside a church auditorium. Whenever a picture was taken with our point and shoots, the pictures are grainy, dark and blurry. I have always been disappointed with the photos of these special moments. What needs to happen is the shutter needs to be open longer so the ISO can be lowered.
I am super excited about understanding this. Not only for Evan's special events, but Ethan's programs are usually in a gym, and once again, the light isn't all that great. I can now have some great pictures of the boys during programs and plays.
Here are a group of photos taken with only the ISO changed.
ISO: 200
ISO: 800
ISO: 3200
ISO: 6400
All: 28mm f/5.6 1/100s
Lens: Canon 18-55mm f/3.5
As you can see, the higher the ISO, the more light is allowed in. However, the last photo looks overexposed and you can see some grain.
Here are some pictures I took of the boys tonight:
All images: ISO 3200 f/5.6 1/25s
Shot with a Canon 18-55mm f/3.5 lens
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