[Leica] USAF Lens Resolution Chart

[douglas.sharp at gmx.de (Douglas Sharp)]

Best place for testing a lens out of doors is a car park - lines and 
lines of number plates disappearing into the distance
Douglas

Frank Dernie wrote:
> The problem is that either a test chart or newspaper on a wall 
> exaggerate the importance of lens flatness of field to a far greater 
> extent than it should for a general purpose lens. For a macro lens 
> this may be vital, and speed for one thing, is sacrificed for flatness 
> of field. I take 3D objects so part of my image will be OOF when using 
> wide apertures. As long as the centre is correct to the rangefinder it 
> is not reasonable to ask for more in a lens for a this type of camera 
> IMHO.
> Frank
>
>