Quote Originally Posted by Ian Grant View Post
Where all the CZJ post war lenses are let down is the quality of their focus mechanishs and the cheap natsy lubrican that dries out, or gives unsmooth travel, sometimes the aperture stop down systems are poor as well.

Ian
As I recall, the 300mm that I had was flaky in this way. I remember taking the whole system to Ken Hansen where I traded it for credit toward a lighting system, and seeing the guy behind the counter wince when he felt that sandy sensation in the helical.