Will my Nikon D3000 lenses autofocus on a D7100?
Asked 2/23/2017
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I’ve upgraded from a Nikon D3000 to a D7100 and want to keep using my existing lenses. Will lenses that autofocus on the D3000 also autofocus on the D7100, and is there anything I need to check on the camera or lens?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
9y ago
2 Answers
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Since the D3000 requires lenses which have autofocus motors built into the lens, any lens that will AF on D3000 will also AF on a D7100.
The D7100 has an AF motor in the camera body that enables it to focus older Nikon AF lenses without an AF motor in the lens. When a lens with an AF motor in the lens is attached to the D7100 it controls the AF via the electrical connection between the camera and lens just as the D3000 does.
Both cameras also have the same sensor size, so any lenses that project an image circle large enough for the D3000 will also project an image circle large enough for the D7100.
Where you might notice some difference is with regards to resolution. The D3000 had a 10 MP sensor. The D7100 has a 24MP sensor. When you pixel peep with images from the D7100 you will be viewing them roughly 2.5X larger than when viewing images from the D3000 on the same monitor. Due to the increased resolution of the D7100, lens performance that was acceptable with the D3000 may not be as acceptable when used on the D7100.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
9y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. If a lens autofocuses on your D3000, it should also autofocus on the D7100.
Both cameras use the Nikon F mount and have the same APS-C/DX sensor size, so lenses that work on the D3000 will fit and cover the D7100 as well. In fact, the D7100 is more flexible: it also has an in-body AF motor, so it can autofocus with some older Nikon AF lenses that the D3000 cannot.
If autofocus is not working, check these switches:
- On the D7100 body, set the focus-mode switch on the left side to AF.
- On the lens, set the switch to AF or M/A if available.
One thing you may notice is that the D7100’s higher-resolution 24MP sensor can reveal lens weaknesses more easily than the D3000’s 10MP sensor, especially when zooming in closely on images. But compatibility and autofocus should not be a problem for lenses that already AF on the D3000.
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