Is Nikon D5100 and Sigma 17-70mm f/2,8-4,5 DC HSM Macro compatible?

Below you will find your chosen camera and lens. Click on the product name for more information.

Buy	Nikon D5100 Released: 2011 Type: Digital SLR Sensor: DX / APS-C (1.5x) 16,2 Megapixels 4928 x 3264 pixels
Buy	Sigma 17-70mm f/2,8-4,5 DC HSM Macro Released: 2008 Normal Lens (zoom) Suited for cameras with APS-C sensors Focal Length: 17-70 mm Aperture: f/2,8-4,5

Can you combine these two?

This is the short answer:

Yes! This combination is compatible

The camera and lens you have chosen can be used together. Here is a longer answer:

Lens is available with Nikon mount

This lens is manufactured by Sigma but is available with a Nikon mount.
This lens is also available for Canon cameras, so before you buy the lens - make sure you get the right version.

Optimized for each other

Some lenses are optimized for a smaller APS-C sensor. Sigma 17-70mm f/2,8-4,5 DC HSM Macro is such a lens, requiring an APS-C sensor, and this is exactly the sensor you will find inside Nikon D5100.

Autofocus in lens

To obtain autofocus there has to be an Autofocus motor in either the camera or the lens. This specific lens, Sigma 17-70mm f/2,8-4,5 DC HSM Macro has a built-in autofocus (AF) motor and in this case this is critical since Nikon D5100 does not have a built-in autofocus (AF) motor. In this case, the autofocus (AF) motor in the lens is what makes it possible to use autofocus.

Read more about Autofocus motor

Focal Length

The Canon camera has a sensor of type DX, a smaller version compared to a Full frame sensor, which means that your experienced Focal length will be multiplied by 1.5x.

Actual Focal Length for this lens:
17-70 mm

Experienced Focal Length with this camera:
26-105 mm

Read more about Crop factor on Nikon cameras

Total weight

When you are looking at a combination of a camera and a lens you must always consider the total weight. Each product weighs in at:

Nikon D5100
611 gram

Sigma 17-70mm f/2,8-4,5 DC HSM Macro
490 gram

Together they have a total weight of 1101 gram (equal to 2,43 lb).