Sven wrote: ks> As ks> the difference in distance between lens and film (when moving the lens from ks> infinity to 1:1 magnification) equals the focal length, I was able to measure ks> this with some precision.
Sven, this may be valid with older lenses design, but nowadays modern lenses focus at close distances by shorting the focal length. The odds are that your lens is near 90mm at infinity and drops towards 80mm at the shortest focus distance. Servus, Alin
