I'm thinking of getting a macro.
I've noticed that the minimum focal distance is around 20cm (at the i'm looking at).
I've also noticed that some come with a 1:1 ratio, and others 1:3.
My question is, 'is there much of a difference from the 1:1 ratio as there is to the 1:3?'
At the moment i'm looking at these ones
SP AF90mm F/2.8 Di Macro
18-50mm F2.8 EX DC MACRO /HSM Mount
AF 60mm Micro 60 f/2.8D
But i'm just a bit confused.
So if someone could shed some , that would be greatly appreciated.