11-19-2011, 05:55 PM
No one carries around a tape measure when photographing.
You are kinda working backwards. You need to work out which lens do what, rather than worry about dof scales.
For example, if someome has a largish face and you want to flatten it somewhat, you can shoot them with say a 200mm lens. Whether the left eye is slightly softer than the right is not really a big deal as long as the closest eye is in focus.
How the face looks is more important!
You are kinda working backwards. You need to work out which lens do what, rather than worry about dof scales.
For example, if someome has a largish face and you want to flatten it somewhat, you can shoot them with say a 200mm lens. Whether the left eye is slightly softer than the right is not really a big deal as long as the closest eye is in focus.
How the face looks is more important!