You are viewing the course site for a past offering of this course. The current offering may be found here.
Lecture 15: Cameras and Lenses (90)
minos-cs184

Since the left picture has a shallow depth of field, is it a typo that the left picture was taken with f/4 instead of f/11? Sorry if this was covered in person.

jenzou

To minos-cs184: I don't think this is a typo. The slide before this also compares depths of field, where the blurrier background (shallow depth of field) image has aperture $f/4$ and the clearer images have smaller apertures $f/11$ and $f/32$. This is similar to the example in this slide, where the blurrier background image has larger aperture $f/4$ and the clearer background image has smaller aperture $f/11$.

jenzou

Larger aperture means smaller shutter time for the same amount of exposure, which produces blurrier background (shallow depth of field), so this means $N$ in $A=\frac{f}{N}$ is smaller (and less motion blur, which applies more to example on previous slide and not this slide).

Smaller aperture gives the opposite result.

You must be enrolled in the course to comment