I was wondering if anyone has any knowledge of non ai nikkors, such as the Nikkor-P, Nikkor-H, etc. I was interested in the primes, specifically the 24,28, and 50. I know there is many other varieties of non-ai lenses, but i hear things about saying the lens has to be modified before use on cameras. What exactly does the modification entail, and is it needed for use on micro four thirds with a standard adapter. What about focal reducers? Other than this, is the performance of these lenses any good, or should i just skip them and wait for a good deal on an AI-S or AI lenses?