doozie
08-12-2007, 12:01
Hi,
I was wondering if someone could explain what the focal length measurements actually are.
Say I have a lens of 18-55mm what is the 18mm and 55mm a measurement of ?
I ask this because (I may sound really stupid here:bonk:) when I fully zoom my lens I dont think there is a Physical difference of 37mm in the lens (the difference between 18 and 55) or is there ?
Or is it something else going on inside the Lens ?
Cheers.
I was wondering if someone could explain what the focal length measurements actually are.
Say I have a lens of 18-55mm what is the 18mm and 55mm a measurement of ?
I ask this because (I may sound really stupid here:bonk:) when I fully zoom my lens I dont think there is a Physical difference of 37mm in the lens (the difference between 18 and 55) or is there ?
Or is it something else going on inside the Lens ?
Cheers.