Tagged Questions
1
vote
3answers
158 views
What does infinity focus mean and when should I use it?
All my lens have focus ring where at the end there's an infinity symbol. What does that mean? If I'm taking landscape shot and what everything from near to far to be in focus, do I use infinity? Or am ...
20
votes
3answers
50k views
What does STM mean on a Canon lens?
The upcoming Canon 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology?
We have a terminology thread ...
4
votes
1answer
356 views
What is an auto-focus motor?
I recently bought a Canon 550D, and I read it has an auto-focus motor, which not all cameras possess. I'd like to know what it is, and what I can do to keep it running smoothly; AFAIK the manual ...
7
votes
3answers
2k views
What do the AF-A, AF-C, and AF-S autofocus settings mean?
My camera has these settings for autofocus, and I don't know what they mean. I suspect "A" is "Auto", and "C" is "continuous", but I have no idea what "S" is.
