Would that be the Nikkor ED AI-S 300 mm f/4.5?Lou Jost wrote:To add to David's tests, here are some Atlas moth scales using the Nikon 300mm f/4.5 ED-IF (...)
This thread gave me an idea of testing the Olympus 300 mm f/4 Pro as tube lens on Micro 4/3, which for general photography turned out to be sharper than any other 300 mm I tried. Unfortunately it will not be any time soon because I am already beginning to pack my (way too many) photo things for the next move (some time between December this year and July next year).
PS - There is also an Olympus OM 300 mm f/4.5 that is a lot cheaper than the Nikkor ED 300 mm f/4.5 and may be worth testing. I have never tried it but have obtained good results with the corresponding 100, 135 and 200 mm Olympus OM lenses used as tube lenses for full frame.