This week's lesson was on aperture...a good thing, since this is something that has always confused me. An open (large) aperture lets in more light, and usually uses a faster shutter speed, resulting in a blurred background...
1/50
f/3.5
ISO-400
22 mm
A closed (small) aperture is a smaller opening, meaning less light and longer shutter speed, things are more in focus, even in the background...
1/6
f/10
ISO-400
24 mm
This is not the best example...see how the background is still a little blurred? But there is a difference between the two.
The confusing this is that a large aperture is a smaller number and a small aperture is a big number. Less is more.
Right now I only have the kit lens for my camera (I just ordered a new lens...I am excited!). It doesn't allow for a very large aperture, so in low light it doesn't do very well. Which is too bad, because I take a lot of pictures inside. I took this picture outside in the middle of the day and I love how it turned out...my baby didn't really want me taking her picture. She wanted me to push her on the swing.
1/1600
f/5.6
ISO-400
50 mm

f/3.5
ISO-400
22 mm
A closed (small) aperture is a smaller opening, meaning less light and longer shutter speed, things are more in focus, even in the background...

f/10
ISO-400
24 mm
This is not the best example...see how the background is still a little blurred? But there is a difference between the two.
The confusing this is that a large aperture is a smaller number and a small aperture is a big number. Less is more.
Right now I only have the kit lens for my camera (I just ordered a new lens...I am excited!). It doesn't allow for a very large aperture, so in low light it doesn't do very well. Which is too bad, because I take a lot of pictures inside. I took this picture outside in the middle of the day and I love how it turned out...my baby didn't really want me taking her picture. She wanted me to push her on the swing.

f/5.6
ISO-400
50 mm