Hi all,
Just 2 questions
Is it right that you can take the focal length of a lense and divide the second number by the first to get the zoom?
Eg 300/70 = 4x Zoom?
Secondly I was in a certain camera shop today looking at a 400D and the guy I was talking to told me that putting a sigma or tamron lense on a 400D is effectivley a 480m lense.
How does that work?
Just 2 questions
Is it right that you can take the focal length of a lense and divide the second number by the first to get the zoom?
Eg 300/70 = 4x Zoom?
Secondly I was in a certain camera shop today looking at a 400D and the guy I was talking to told me that putting a sigma or tamron lense on a 400D is effectivley a 480m lense.
How does that work?
