I've had limited macro experience with my 35mm's (Nikon FM and FE). I've only used a 55mm micro-Nikkor, f3.5. I had lots of fun with it, but always wanted more. as in a bellows. I picked up a non-Nikon bellows unit off eBay and it seems to be in good working condition. The world of bellows on the 35mm is all new and I was hoping someone might be able to decipher/explain the markings on the rails for me. There are two different sets on each rail and the sets on the two rails differ from each other as well. Attached are some pics. Sorry for the quality.