..I have one plastic mount lens the old Nikon 28 to 80 D series, from the film days of the 1990s. So far it has held together for over 15 years for me, and I have made some decent pictures with it including one of my very favorite pictures of my young son. The 28-80mm D is a wobbly lens... the front extending part of the zoom barrel wobbles quite a bit, but I bought it and used it on my Nikon d2x around 2005. I think I paid $35 for it. This is a full-frame zoom lens used on a crop-frame Nikon, and this photo made around 2006 is perhaps one of my all-time favorite shots of my young son.