I want to get a portrait lense for my lowly D40. The important thing to note is that I don't care about AF, though I do care about AE. As it's portrait, the absolute minimum is 50mm, maximum is probably in the 80s? The old Nikon 1.8 50mm seems ideal (though possibly a little short), but I can't figure out what models of it exist, and if any are AE on the D40. Those more knowledgeable, what advice do you have (other than 'get a D80')?