I slowly made my trek through wide, to super wide. I bought a 35mm f2.8, 28mm f3.5, 20mm f4 and then my Wife bought me a 15mm f3.5 AIS for a gift
for our Wedding. The 20mm f4 is simply an amazing lens. It doesn't look like any special when you pick it up, but its performance was dramatic.
Then I got the 15mm f3.5 AIS. I've got to tell you. I saw Ken Rockwell's reviews and others who say it Ghost Flares like crazy. I never experienced it.
Of course, some common sense has to be used with this type of lens to begin with. If you keep it level, there's absolutely NO distortion. If you want to
induce it, just tilt it up or down to get the effect. After using it, I can tell a lot of photos you see like sweeping images of a Bahama Beach shots definitely
are taken with this type super wide lens. I like to put something right up front and the background and both images are perfectly in focus due to its wide
focusing range. The older 15mm f5.6 is I'm sure a winner too, but I never got a chance to shoot with one. I almost bought one at Ken Rockwell's in NYC
showroom. It was a used one. He wanted $550, but he pointed out that one of the tiny lens near the back of the lens had a crack in it. That lens was probably
7 years old at that point and I don't think Nikon had the replacement parts for it. Even if they did, I'm sure the cost would have at least doubled to have it repaired.
in my opinion, the older Nikkors were just built better. A lot of the newer Nikkors just feel like plastic. When you pick-up one of these lens, you can see and feel the quality that was built-in. Back in the 80's, I had a relative at Nikon USA in Garden City, NY. I had all my older Nikkors converted to Ai at that time. The cost were really
low but it was worth it. Good luck with your choice !!