Quote Originally Posted by StoneNYC View Post
Anyway I haven't noticed any bad CA actually,
CA is not the problem, it's usually coma and SA. Optical aberrations reference.

Quote Originally Posted by StoneNYC View Post
but I have the RZ W lenses? Maybe those are better?
Nope. RZ W are generally optically identical to RB lenses. Some (KL) RB lenses are even newer than the older RZ lenses, for example:
- RZ 180 W is a Tessar and I think identical to an RB 180 C
- RZ 180 W-N is a Sonnar and identical to an RB 180 KL

So the RB 180 KL is in fact a newer, slightly sharper-wide-open lens than an RZ 180 W. Slightly different look, some prefer the older.

Quote Originally Posted by StoneNYC View Post
If anyone is interested let me know, in the mean time congrats again OP looks like you have something spectacular
KEH and eBay have plenty make sure you get the M-LA version. It's a spectacular lens for sure.