Can the Nikkor 50 mm AF 1.8D be used on a D3100?

My friend aggressively claims that it can be used on the D3100 that I'm buying soon and said hers is AF-S but I doubt so. The AF-S version has not come out yet if I'm not wrong, right? The one that's compatible with the D3100 is the AF-S 50mm 1.8G right? She also claimed that I don't have to charge the camera when I first buy it. She claimed that I should drain out the battery first before charging it. It is true?

She has been into photography for almost two years (uses D90) and sometimes talks like she knows everything and always put me down when I tell her what I read about photography on the net. She claimed what I read were all rubbish. She was strongly against me buying the D3100 but I told her off, saying that it's my money and it doesn't matter what camera you're using as how the pictures turn out it depends on the photographer. I know I'm capable take better photos than her (used her D90 a few times before) and she always praised me a number of times for my photos.So, are the things she said about the lens and battery true?

Added (1). Oops I forgot to mention that I know the lens is compatible but I can only manual focus on it and not use auto focus. Just wanted to be sure that I can't use it's auto focus function.

The AF-S version which is much faster auto-focusing than the older AF version is going to be a popular lens and the one you need if you wish to use the 50 mm f/1.8 in the auto-focus mode.

The AF lens will work on your D3100, but you will have to manually focus it using the electronic rangefinder in your cameras viewfinder

Just about any lens that has the Nikon F-mount, including the 50mm f/1.8D AF, can be used on a D3100. If you get it, you will have to focus manually. It requires an in-body autofocus motor to drive it, which the D3100 doesn't have.AF-S lenses will autofocus on the D3100 because they have autofocus motors built into them.

I always discharge new batteries before I charge them the first time, but that's just personal preference. Some people think it's a good idea because certain nickel cadmium batteries would supposedly "remember" that they have a smaller capacity if they weren't fully discharged before recharging. The D3100's battery is a lithium ion battery, so that's kind of a moot point. Go ahead and charge it straight out of the box. It's not going to hurt anything.

BTW, the D3100 is an excellent camera. I chose to go with the D90, but I have a friend who shoots with a D3100. She has one or two really good prime lenses, and her pictures are fantastic. You're totally right--it's more about the camera than the photographer.

You're right, your friend is wrong.

As to batteries. IF you buy it there will be some juice in it. I always advice people to put it in the charger while they start reading the manual.

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