Autofocus on D3100 ?
220538
No. Only higher end Nikon's have built in focusing motors in the body, which this lens needs. 3000 series and 5000 series lack this internal motor.
379181
With mine I have to be ridiculously close to the subject, like maybe an inch away. Try putting your lens closer and closer to what you're photographing until it is in focus before trying auto focus.
2027089
You can buy a lens that is not DX and many will work fine. This one above will not auto focus. The Nikon AF and AF-D will not work on a camera that does not have an internal focus motor, like the D3100. The later lenses, AF-S, will work and auto focus. If the lens is an FX you will not get an image that is as wide and tall as what you see in the finder on a DX camera. You will get a good sharp image but you must compose more carefully to avoid the DX sensor cropping out vital parts of the image the FX lens can see.
2242140
Your best bet with any camera is to use manual focus, auto will always be hit or miss unless you are tracking across an empty sky. Gx7 has an easy toggle switch to manual/auto.
1321063
AutoFocus was fine. Some circumstances, e.g., bird watching, require manual focus.
95023
jESSICA, I got an article from Nikonians that affirm it performs auto focus with D--3100/5100/5000/3000/60 and 40.Don't take my word on this and research a bit more, maybe call Sigma and ask them directly.I hope I helped you in some way.
2002965
The lens works fine on my Nikon D3100 camera with one exception; it does not auto-focus (which I know) and I am having trouble getting landscape photos in focus.
1663833
Usually yes. If you're in an auto mode there me be a delay for focus / light metering etc like most dslrs. However none of that in manual.
1094438
The nice thing about Nikkor lenses is that they will fit and any Nikon camera. This one however has an auto focus mechanism in it that some cameras are unable to do. I do not believe that the auto focus will work with the D3100. You will have to manually do so. The pictures however are great. I have this lens and I love it.
1793684
Thanks question.This lens can not work autofoucus for D3100 D3200.Thanks in advance.
2138670
You can use Bower,Vivitar,Zeikos and other brands that will multiply the focal length by 1.5 or 2 times.They will not autofocus but at extreme telephoto it is little or no adjustment needed.
2198945
I am using this lens with the D3100 and have no lag issues. In less you are in very low light, or working with an image that has very a low contrast background, focus should be good. Focus with the Tamron is as fast and accurate as with my Nikon 55-300 lens, maybe faster.
1540963
I have a D5100 just set the focus square where you want it and it will focus. The lens must be in auto not manual.
2056444
It will fit, but autofocus will not work. That's because the lens doesn't have an internal focusing motor; and the D3100 does not have a motor drive in its body to power the AF mechanism in the lens. This lens' AF will work only on the higher end Nikon cameras like the D7000/7100 and higher. However, if you're okay manually focusing, then it'll do.
621439
nope, nope, nope. You can use an autofocus lens on it....so long as you manually focus the lens.
1362355
Hi, This lens as you says the D3000, D5000, D7000 in the series of camera does not work for the auto focus. And you can manual shooting. Thanks in advance.
1247631
Probably not autofocus at least not reliability. You lose 2 stops and the D-7000 probably can't focus above F5.6