Kim Coxon
Moderator
One of the problems with FSU lenses is the degradation of the grease which becomes waxlike and sticky. The only proper cure is to strip the lens and re-lube it. I have just serviced a J9 for a forum member because the collimation was out. The focus appeared smooth but there was a strange odour and oil was seeping out of the lens. The reason for this became obvious during the stripdown. Someone before the RFF member decided it needed a re-lube and rather than do it properly, had used WD40 to "solve" the problem. It was everywhere including beginning to get on the optics.
A full sheet on the strip, rebuild and collimation will follow.
A full sheet on the strip, rebuild and collimation will follow.
