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In your situation, I would look for a 50mm f/1.8 AF-D lens. It meters with the D40, but does not auto-focus. In fact, the only 50mm lens that does autofocus with the D40 is a $500 Sigma, so I guess that's out of the question. However, you will still get the little green focus conformation dot in the bottom-left of the viewfinder, which is a big help.
I have a 50mm AI (or possibly AI-S, I'm not sure) 1.8, and I love it, even though I have to manually focus AND manually set the exposure. It simply opens you up to a whole new world of photography.
Also, I'd recommend getting one used from a reputable website. I know there's a nice little used spot not too far from where I live, and I plan on using it soon (I'm not one to buy stuff ). But whatever you do, best of luck. It's a big world out there!
Sure the mount is an F mount. Ofcourse you will have to focus manually.Ok, I've decided on this one:
http://cgi.ebay.com/Nikon-50mm-f1-8...oryZ3323QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
It'll work, right?
I agree with Kundalini. While Ebay is absolutely fantastic, you really should be careful with it.
As for your lens choice, you do realise that that's an AI-s lens (not the one I suggested)? Nikon has made several F-mount lenses over the years: AI (the earliest), AI-s, AF, AF-D, AF-I (this version has a built-in focusing motor which WILL AF with the D40), and now AF-S, the newest model.
Your one is an AI-s lens, which means that not only will you have to manually focus, you will have to manually choose the exposure for every single photograph; no automatic modes at all.
I would recommend something like this (sorry, I only do UK stuff), as this lens has all of the automatic modes your Nikon D40 is compatible with (except AF, of course), and is also the newest model.
Enjoy! Hope you make the right decision whatever.
What do you mean by "which of the above lenses will meter with the D40"? If you mean lens types, then anything with AF as the prefix will meter correctly. Any AI-type lenses will not.
Another thing to think about is that you also won't get an exposure meter (the little line with dots on) to aid with your exposure. It will be either down to a seperate light meter or your own guessing.