Originally posted by Jed
Oh good grief here we go again.
Szennyboy,
The 60mm micro is a very sharp lens with the CRC lens which has virtually no lens distortion because of it's flat lens element.
Great advice too. What pray tell is a flat lens element? A clear filter maybe? Or maybe you mean flat field, which has nothing to do with flat lens elements. But then again the 60mm is not a great flat field lens either, so it can't be that. So what exactly do you mean? It'd be the find of the century if a clear filter results in virtually no lens distortion.
And CRC is not a lens, it's a system. CRC enables a lens to focus well close as well as at infinity. It is found on the Micro Nikkors for obvious reasons, as well as selected wide angles. The CRC does not by itself cause a lens to be "very sharp", that's via lens design and optics, the CRC just, as its name suggests, corrects focus at close range.