Understanding Aperture and Depth

1. Depth of feild is the zone of sharp focus. 

2. Opening at the front of the lens.

3. f:1.8 creates the shallowest depth of field when f/22 makes everything in focus 

4. Close down the aperture 

5. Stop-down

6. The shutter speed goes lower 

7. Av mode 

8. A lense with a big maximum aperture opening 

9. auto single focus lense