I purchased a used 28mm PC Nikkor lens a few weeks ago. It is in pristine condition, but I cannot easily remove it from my D70. Although it is an F mount lens, I do not think it was designed for use with the D70. I might be mistaken. Anyway, I became concerned and have not used it since. I might reconsider acquiring the 85mm PC lens in the future.
Crystall the PC-85 is very nice but you have to stand very far to take a picture of a building compare to the PC-28, if you look at the first picture in order to get the shot I had to back up in a park in front of the building you can see buy the leaves in the top and the branches on the sides.
Kevin I think it's made out of tin, if you look at the second picture, the house roof in front of the church has the same pattern, I guess they were made by the same peoples. There's some more old houses but the sun don't reach them as early.
Paul i dont have the PC-28, but one advantage i guess of the PC-85 is that you have to stand a lot farther away to take the shot meaning that you should have a lot less distortion in the building compare to a wide angle, but distortion can be creative too if use wisely.