Which lens you use the most, and which one gives you the most fun?

brightcolours wrote:

I use my 70-200mm f4 L on APS-C the most.



Fun... hmm. The most fun because it is so impossible is my Ultra-Micro-NIKKOR 55mm f2. Expensive little gem from the 1960's for industrial purposes like early chip production. With m39 thread and an unusual 43mm flange distance, a set focus for 1:4 reproduction and an f2-f8 range it is quite an impossible lens to use. But that is what makes it fun... When you get a shot, it has something special. I built my own adapter for it which gives it about 1:2.5 magnification, and offers trap focus.