Works in the Nikon D3100
1574233
Funciona con cámaras formato DX, la cual incluye la cámara que mencionas / Works with all DX cameras, which is the camera you mentioned
35056
I am not sure about the D3100. If you already own the camera, I would check the battery that came with it and compare the battery to this one. That is what I did for my D5100.
1220168
i just answered this but i would go to amazon.com and type in the search-bar Nikon D3100 Battery, cause they look different than the D40 and D5000 batteries!rick~
2137061
Yes, it functions just like the shutter release button on the camera. I have the D3100.
2027084
Actually no; the lens certainly will fit on your D3100 but the camera won't know it is there unless you put it in(M) manual mode, and then the TTL lightmeter won't work. Only CPU lenses work with the D3100 or D3000, or D5000, and D5100
1277958
I'm not sure. It works on a D3100 and also D5000, so check if yours is compatible with those two.
1892502
I use this on my Nikon D5100 D700 D600 D3100 D7100 D800E and it works great!
1922747
We have the D3100. It appears it should fit, but I don't know for sure.... Sorry about that.
680538
Yes it will work on a D3100, has fast internal auto focus, and is great for large groups.
1446677
Yes, any Nikon F mount lens will work on your D3100, and this lens will communicate all data with your camera body.
1167958
Not sure if this will help or not. I bought the same battery for my Nikon D3100 some time ago and it worked fine. Nikon then released a firmware upgrade for the D3100 and apparently this upgrade stopped the Wasabi battery from being compatible. Fortunately (for me) I read about the incompatibility before I knew that the Nikon upgrade was available so never installed the new firmware. I suspect that something similar has happened with the D5100.
810060
The listing on Amazon for the ML-L3 does not show the Nikon 3100 as being compatible, nor does the Nikon website show the Nikon ML-L3 as being compatible with the D3100; I'd guess it won't be compatible.
235572
It's a DX lens. So yes. It will work on the D3100. It's 67mm filter size. Googled that.
579376
I have a D3100; however the synopsis says this flash is compatible with all Nikon D series cameras. I love this flash. Hope this helps. Good luck!
1257386
Yes it does. I ordered it to use with my D3100 and it does exactly what I need it to do.
1013256
It works on my D3100, so I would assume yes, but the adage over making assumptions applies but really the only major differences between the two was image processing and megapixels I believe. It goes into the top port on the 3100 (pic http://www.dpreview.com/reviews/nikond3100/Images/ports.jpg) and looking at a similar pic for a d3200 (http://www.ephotozine.com/articles/nikon-d3200-dslr-review-19230/images/highres-nikon_d3200_ports_1338215617.jpg) that port is still there just at the bottom (under the rubberized cover on the left side)
1684830
It will work with the d7000, not sure about the D3100 It's a full frame lens