I have a wonderful friend who is just beginning the fun [read frustrating] adventure of learning to work her DSLR. She asked me a question about aperture the other day that I remember being really confused for way too long about myself, so I thought I would post a little bit about it.
She wanted to know exactly what the depth of field was for a 1.8f vs. a 22f.
Because I love a good example, I am posting several photos here with the information under it.
As you can see there is a huge difference between a 1.8f and a 22f...but not so much between a 10f and a 22f.
I hope this helps!
If this didn't answer her (or YOUR) question- let me know. If I know the answer- I'll post it. If I don't I'll see what I can do to find it! =D
1.8f Shutter speed 1/8000 ISO 125 50MM
4.5f Shutter Speed 1/1250 ISO 125 50MM
10f Shutter Speed 1/250 ISO 125 50MM
22f Shutter Speed 1/50 ISO 125 50MM