[Brightcolours]

Aren't the borders more important at the wide end than the long end ? If so why do they design the lenses to have maximum distortion at the wide end. Is this a property of the angle or could they flip things and make the wide angle more linear and the long end more pincushion ?

 


I believe it is the current results from testing of this lens ...

 

thats for the old Pana 12-60mm f3.5-5.6 though right, not the new f2.8-4 ?

Uncorrected lenses are called "fisheye". The only uncorrected lenses you see nowadays that do not correct for fisheye distortion are very wide angle lenses, because those are for maximum effect (and of course maximum FOV).

An uncorrected lens never shows things as "pin cushion", that is an effect of over correction.

If you undercorrect at a wide angle, it shows up stronger than in longer focal lengths.