Hi all, I just got hold of a 50/2.8 Vivitar VHE, which on close inspection looks like its suffering from the slightest of internal haze. I am thinking that cleaning it might be an idea, as its got readily accessible grooves for a lens spanner. Any recommendations for lens spanners...I dont have a set? Also, how do you get the elements centred when doing something like this....are they made with tight tolerances so they slide in? I've got some ROR and a new lens microfibre cloth to do the cleaning. Maybe I make a couple of prints, one with each lens I have, just to see whether this haze makes any odds. My other lens is a 50/2.8N EL Nikkor. I am interested to see whether this VHE Vivitar is any better. Incidentally, its a 5 element 3 group design as it says so on the box. I thought Componon S lenses were 6 element, but then saw this on FirstCall Photographic.... http://www.firstcall-photographic.co.uk/products/702/schneider-componon-s-50mm-f28-enlarging-lens So is the VHE a replica of the Componon S?