12-27-2015, 04:32 PM
Yep the EX range were a mixed bag..... I've the 50-150mm F2.8 EX HSM in the PK mount and feels very solid (also excellent optically) as well as 10-20mm F4-5.6 EX (screwdrive) in the PK mount, but they were after the 28-70mm F2.8 and I think even then they were trying to shed their earlier reputation.