Hello all - Does anyone have any experience with the ~$35 Dandelion focusing confirmation chip as installed on a Nikon lens with a Nikon (D)SLR? http://filmprocess.ru/nikon_spec_en.htm I have read of many 4/3rds, Canon EOS, and Pentax users who have purchased lens adapters with these already installed for their repsective mounts, but no Nikon users with Nikkor glass. I intend on installing the Nikon-type ones onto my library of Nikon MF lenses with the intent if having my D300 recognize the lens in the same way it reads the old Rolland Elliot CPU modifications. In fact, I think this may be superior to the R.E. mods, as the Dandelion chip can be programed with the correct aperture and focal length for each lens as opposed to the R.E. hacks which only transmitted the correct aperture. So my query is to see if anyone has tried to install the Dandelion onto their AIS lens and how it is working out? Also, where would one learn and find details on where and how each lens mount needs to be cut out? Or does anyone provide the installation as a service? It would have to be an independent shop as no Nikon authorized service center is allowed to do it (I've asked around). I assume there are limitations for some lenses. I consulted this Bjørn Rørslett chart detailing lens upgrade options for a service he does not seem to actually offer. http://www.naturfotograf.com/lens_CPUconversion.html I would love to upgrade as many of my older Nikkors as possible and maybe even replace the R.E. installed chip in my 300/2.8 that has the CPU from a 45mm/2.8 which gets mixed up with the real 45mm/2.8 that I own when sorting in Lightroom... So any pointers?