I am a newbie with a d5100. I don't understand how some reviews say it is autofocus, & some say it is not?
2026944
Long story short this lense doesn't have an autofocus motor built in it and neither does the 5100 so autofocus won't work but it would with a camera such as a D7000 with an autofocus motor built into the camera
2026945
It won't autofocus with the D5100. It only autofocuses on cameras that have an internal focus motor.
2026946
Hello,I too was confused when I first bought that camera. especially after purchasing lenses for it and getting the wrong ones. This lens is not going to work with your camera. The camera is great but it doesn't have a focus motor in the actual camera itself. So, you have to make sure all the lenses you buy have a motor in them. They will say AF-S in the title. They are easily distinguishable by the buttons on the side of the lens (M/AF). Similar to the stock lens that comes with the D5000. Hope this helps !
2026947
The Nikon 50mm f/1.8D does not have an autofocus system built within the lens. The Nikon D5100 does not have an autofocus motor inside the camera body. So this leaves you stuck without autofocus in general. This lens is to be used with a camera with an autofocus motor inside the body of the camera (i.e. D90, D7000). If you wanted a lens just like this or better, check out the Nikon 50mm f/1.8G lens. It does have a motor inside the lens which enables you to have autofocus in use with your D5100. I myself have the D5100 and have the 1.8G lens. It has awesome performance with relatively quick autofocus. Hope this was helpful. The Nikon 50mm f/1.8D does not have an autofocus system built within the lens. The Nikon D5100 does not have an autofocus motor inside the camera body. So this leaves you stuck without autofocus in general. This lens is to be used with a camera with an autofocus motor inside the body of the camera (i.e. D90, D7000). If you wanted a lens just like this or better, check out the Nikon 50mm f/1.8G lens. It does have a motor inside the lens which enables you to have autofocus in use with your D5100. I myself have the D5100 and have the 1.8G lens. It has awesome performance with relatively quick... » Read More The Nikon 50mm f/1.8D does not have an autofocus system built within the lens. The Nikon D5100 does not have an autofocus motor inside the camera body. So this leaves you stuck without autofocus in general. This lens is to be used with a camera with an autofocus motor inside the body of the camera (i.e. D90, D7000). If you wanted a lens just like this or better, check out the Nikon 50mm f/1.8G lens. It does have a motor inside the lens which enables you to have autofocus in use with your D5100. I myself have the D5100 and have the 1.8G lens. It has awesome performance with relatively quick autofocus. Hope this was helpful. « Show Less
2026948
The D5100 only autofocuses with the latest AF-S lens, and also older professional AF-I lens. Briefly, AF-S lens have a built-in motor to drive the focusing mechanisms on the lens, whereas AF lens rely on the motor in the camera body (like the D90 or the D7000). Most traditional screw-drive AF lenses will not autofocus on the D5100, but will autofocus on the D90/D7000. Lens that say "AF-S," will autofocus with the d5100, and most lenses sold today for the D5100 are AF-S. The D5100 has no internal autofocus motor, so it will not autofocus with original-style screw-drive AF lenses. This is why some lens will autofocus with the D5100, and some won't. The D5100 only autofocuses with the latest AF-S lens, and also older professional AF-I lens. Briefly, AF-S lens have a built-in motor to drive the focusing mechanisms on the lens, whereas AF lens rely on the motor in the camera body (like the D90 or the D7000). Most traditional screw-drive AF lenses will not autofocus on the D5100, but will autofocus on the D90/D7000. Lens that say "AF-S," will autofocus with the d5100, and most lenses sold today for the D5100 are AF-S. The D5100 has no internal autofocus motor, so it will not autofocus with original-style screw-drive AF lenses.... » Read More The D5100 only autofocuses with the latest AF-S lens, and also older professional AF-I lens. Briefly, AF-S lens have a built-in motor to drive the focusing mechanisms on the lens, whereas AF lens rely on the motor in the camera body (like the D90 or the D7000). Most traditional screw-drive AF lenses will not autofocus on the D5100, but will autofocus on the D90/D7000. Lens that say "AF-S," will autofocus with the d5100, and most lenses sold today for the D5100 are AF-S. The D5100 has no internal autofocus motor, so it will not autofocus with original-style screw-drive AF lenses. This is why some lens will autofocus with the D5100, and some won't. « Show Less
2026949
So basically what they are talking about is the difference between cameras with an auto-focus motor built right into the camera body so that all lenses you use will be auto foucusing. Or at least allow you to choose autofocus if yo so desire. And, the cameras that require a lens with a motor built in. For nikon, those are the AF-S lenses. You can go either way. I had the 3100 without the motor which made this "nifty 50" lens exclusively manual focus for me and would also be your experience. I had a great time learning to control that but if you ever get into charging people money for your photos, you probably want something a little more reliable in terms of auto focus. So basically what they are talking about is the difference between cameras with an auto-focus motor built right into the camera body so that all lenses you use will be auto foucusing. Or at least allow you to choose autofocus if yo so desire. And, the cameras that require a lens with a motor built in. For nikon, those are the AF-S lenses. You can go either way. I had the 3100 without the motor which made this "nifty 50" lens exclusively manual focus for me and would also be your experience. I had a great time learning to control that but if you ever get into charging people money... » Read More So basically what they are talking about is the difference between cameras with an auto-focus motor built right into the camera body so that all lenses you use will be auto foucusing. Or at least allow you to choose autofocus if yo so desire. And, the cameras that require a lens with a motor built in. For nikon, those are the AF-S lenses. You can go either way. I had the 3100 without the motor which made this "nifty 50" lens exclusively manual focus for me and would also be your experience. I had a great time learning to control that but if you ever get into charging people money for your photos, you probably want something a little more reliable in terms of auto focus. « Show Less
2026950
Hi. Certain camera bodies don't have a built in motor for autofocus and rely on certain lens models that have a built in motor for autofocus. Cameras in the D40's, D60, D3000's, D5000's ranges do not have the built in AF motor and rely on the lens models which support AF. You will have to resort to buying Nikon lenses with the AF-S feature, or third party brands that have a built in AF motor feature.
2026951
This lens does not have an auto focus motor in it. (i have a d90 which has an auto focus motor, in turn controls the lack of the focus motor in this lens, which makes the set up between camera and lens have auto focus)Your camera, the D5100 Does NOT have an auto focus motor, so you CANNOT have auto focus with a non motored lens.So solution:You need to get a lens that has a auto focus motor in it. (like Rochelle answered) (the 1.8G has the motor you need)If you get the 1.8D lens, you will only have manual focus.with the 1.8G you will have both auto and manual focus.hope it helps:))) This lens does not have an auto focus motor in it. (i have a d90 which has an auto focus motor, in turn controls the lack of the focus motor in this lens, which makes the set up between camera and lens have auto focus)Your camera, the D5100 Does NOT have an auto focus motor, so you CANNOT have auto focus with a non motored lens.So solution:You need to get a lens that has a auto focus motor in it. (like Rochelle answered) (the 1.8G has the motor you need)If you get the 1.8D lens, you will only have manual focus.with the 1.8G you will have both auto and manual... » Read More This lens does not have an auto focus motor in it. (i have a d90 which has an auto focus motor, in turn controls the lack of the focus motor in this lens, which makes the set up between camera and lens have auto focus)Your camera, the D5100 Does NOT have an auto focus motor, so you CANNOT have auto focus with a non motored lens.So solution:You need to get a lens that has a auto focus motor in it. (like Rochelle answered) (the 1.8G has the motor you need)If you get the 1.8D lens, you will only have manual focus.with the 1.8G you will have both auto and manual focus.hope it helps:))) « Show Less
2026952
Try to make this simple. There are two types of Nikon DSLR Camera's DX and FX. DX Nikon Camera's are cheaper, have a cropped, (meaning smaller) sensor and they do not have a screw drive motor in the camera that focuses lenses. In ALL the Nikon FX Camera's that are significantly more expensive and have full size sensors, they have a mechanism (in the camera) that focuses this lens. That is why some have focus and others do not.
1909801
Yes, the auto focus works perfectly. My D5100 is the best cam sin the old slr days that I still own. I would have the cam checked out for a malfunction if yours is not working. Take care and good luck with a great camera.
1540964
I have the Nikon D5100 and yes it does auto focus the camera before taking the picture
1758799
yes, just set the camera and lens to auto focus. Go to Dpreview.com for a complete review. Good luck and Happy Shooting!
674740
new mom- The number of highly positive reviews vastly outnumber the negative reviews mentioning "auto-focus problems" here at Amazon. And you don't see this "problem" ever mentioned in professional reviews of the camera. I strongly suspect the "auto-focus problems" you're referring to are actually caused by a very common beginner's mistake. The Xsi has 9 independent auto-focus points available. The full auto mode which beginners are likely to start out with will use all 9 points at the same time. What this means is that the camera will end up picking the auto-focus point or points which present the camera with the best contrast for determining correct focus. The focus points the camera selects, however, aren't necessarily the best ones for the photographer because the camera doesn't really know what part of the scene is the subject and what parts are the background. The proper technique is to not use FULL auto mode but one of the other modes - P, Av, Tv or M - and to manually (pre)select ONE auto-focus point. Generally, you'll pick either the center point or the one focus point closest to your actual subject in the frame. Many photographers will use a "focus and recompose" method where they auto-focus on the subject using just the center focus point and, while still half pressing the shutter release button, reframe the scene as desired. This works very well in most cases (although there are exceptions where recomposing can cause the focus to shift too much in some fairly specific cases but this is a matter of geometry and not camera design). I believe with the proper techniques, you'll find the Xsi can focus VERY accurately and give you quite professional looking results. P.S. - Shooting active preschoolers can be a bit of a challenge in itself but I'll leave that discussion for another day. :)
1657304
Sorry, my earlier answer was incorrect. Your 5100 does NOT have an internal focusing motor (like my D7000) and therefore will NOT autofocus with this Tokina 35mm f/2.8 Macro.
1086459
Hi, thanks question.This lens can not work autofocus for D3200. Thanks in advance.
95245
It probaby won't autofocus for you, and you may need a lot of light at 5.6. I think it doubles the amoutn of light needed. That shouldn't be a problem for a stellar camera like the D7000. I have one and it does a great job in ultra low light.
662611
I have not had exposure issues but I have had focus issues. Not really issues, as much as just not being happy with the focal range at all, or the autofocus system. If you are shooting auto I can see you having problems as the auto systems just do not seem to be up to par compared to other platforms
298284
You need the second Version of the tokina 11-16mm to have auto focus. The D5100 does not have a focus motor.
350402
Yes, this is a terrific lens for the D5100. It will auto focus on this camera as it has the focus motor built into the lens itself. This lens is fantastic in low light situations. But it can be a bit tight in small spaces. This is the lens I love for newborn photography and with pets...Love the Bokah this lens gives.ETA: I use this lens with my D40x, D7000 and D700...
1209309
As of the August 2014 update it has autofocus. Not even the tech support guy we spoke to knew that. The autofocus works fine. Not as fast as a canon dslr, but good enough.
849563
The autofocus works very fast, accurate and it is easy to quickly select the focus point. To get the best results you should select the smallest focus point and change the release lag time to short. The auto-focus tracking is not as good as DSLR. I am not sure how it compares to comparably priced mirrorless like the sony a6000. It does 3.5 fps with continuous autofocus and 8 fps without continuous autofocus, its not bad, but not as fast as the EM-1 or A6000. The 75 - 300 is not fast on the long end f6.7mm. I think you will be fine, but the EM-1 or A6000 is probably a better choice for a Safari. The autofocus works very fast, accurate and it is easy to quickly select the focus point. To get the best results you should select the smallest focus point and change the release lag time to short. The auto-focus tracking is not as good as DSLR. I am not sure how it compares to comparably priced mirrorless like the sony a6000. It does 3.5 fps with continuous autofocus and 8 fps without continuous autofocus, its not bad, but not as fast as the EM-1 or A6000. The 75 - 300 is not fast on the long end f6.7mm. I think you will be fine, but the EM-1 or A6000 is probably a better choice for a... » Read More The autofocus works very fast, accurate and it is easy to quickly select the focus point. To get the best results you should select the smallest focus point and change the release lag time to short. The auto-focus tracking is not as good as DSLR. I am not sure how it compares to comparably priced mirrorless like the sony a6000. It does 3.5 fps with continuous autofocus and 8 fps without continuous autofocus, its not bad, but not as fast as the EM-1 or A6000. The 75 - 300 is not fast on the long end f6.7mm. I think you will be fine, but the EM-1 or A6000 is probably a better choice for a Safari. « Show Less
561675
No its not defective,no auto feature on it.Its all manual and to focus you must get move in and out to the subject your shooting.Its hard to do with this set there are others that let you use the cameras settings that are better.
121338
I've noticed absolutely no difference in autofocus time. Also, the glass appears so much more clear to me than the cheaper brands. I'm guessing that's partially due to the coatings they use. Anyway, you should be very pleased.
2249370
Check your manual, it says in the accessory section. I bought it for my D5100 and even though it says Auto focus on it, with my D5100 that auto focus feature doesn't work. I need a AF-S for the auto focus feature. Not sure this will help. Happy shopping! And I am a little jealous of the D7 :)
1025539
In auto mode it is the equivalent of a point and shoot. Beyond that everything is adjustable and you need to understand the relationship of Fnumbers, shutter speed and ISO settings and their individual effects on your photo. If you wish to go beyond the beginner stage this camera is great because everything can be individually controlled. Otherwise save your money.