With which of the following methods would you achieve a completely blurry background? Choose the most efficient selection.

Each unit of measurement in aperture is called a....

Which of the following apertures gives the deepest depth of field?

What is the Sunny 16 rule?

Which of these focal lengths is considered a wide-angle lens in 35mm film or D-SLR photography?

What is an "f-stop"?

The "circle of confusion" is a term related to determining the __________.

A butterfly is a name for __________

What does the guide number of a flash describe?

Copal is a type of __________.

If the proper exposure at ISO 800 is f5.6 at 1/250, the proper exposure at ISO 100 would be f5.6 at __________.