Canonet QL17 question

dracblau said:

I recently bought a Canonet QL17 that works great.
It didn't come with a manual and I have a question.

On the f-stop ring, to the right of the "A", there are several numbers in blue. What are these numbers/settings used for?
******
I think that is where you dial in the guide number of the flash-film combo you are using; then the camera sets your flash exposure as you focus. Neat.

Click to expand...