Nikon D7100 vs Nikon D3100

This is a full comparison between the cameras Nikon D7100 and Nikon D3100. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Nikon.

Nikon D7100 were released 2013 and Nikon D3100 was released 2010. That is a 3 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Nikon D7100 2013
Nikon D3100 2010

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

Both these cameras have the same sorts of sensor (called "Nikon DX") which means that if you compare these cameras side by side the lenses will also have the same experienced focal length. Neither of the cameras has a Full frame sensor which means that you will get a "crop factor" where the camera's sensor size affect the focal length with a multiplier.

Camera Focal length, 50mm f/1.8 **
Nikon D7100 75 mm
Nikon DX sensor
Crop factor/focal length multiplier by * 1.5
Nikon D3100 75 mm
Nikon DX sensor
Crop factor/focal length multiplier by * 1.5

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Nikon)

Resolution

Nikon D7100 has a 24,1 MP (Megapixels) resolution while Nikon D3100 has 14,2 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Nikon D7100 24,1 MP
24000000 pixels
6000 x 4000
Nikon D3100 14,2 MP
14155776 pixels
4608 x 3072

Nikon D7100 has a 70 % larger resolution than Nikon D3100. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Nikon D3100 has a larger ISO-range than Nikon D7100. Nikon D3100 has an ISO range that stretches from 100 to 12800 while Nikon D7100 has 100 to 6400.

Camera ISO Range
Nikon D7100 100-6400
Nikon D3100 100-12800

Autofocus and lens compatibility

There is a big difference between these two cameras. Nikon D7100 has a built-in autofocus motor but Nikon D3100 does not. If you want to be able to use autofocus on Nikon D3100 there is a need for having an autofocus motor inside the lens. We really encourage you to look closely at our lens compatibility charts at the links below.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Nikon D7100
Lens compatibility chart for Nikon D3100

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Nikon D7100 can shoot up to 6 pictures per seconds and Nikon D3100 can shoot up to 3 pictures per seconds.

Camera FPS (Frames per second)
Nikon D7100 6
Nikon D3100 3

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

In this case, both Nikon D7100 and Nikon D3100 can shoot movies.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Nikon D7100 weighs 675 gr (equal to 1.49 lb) which is 34% heavier than Nikon D3100 and its 505 gr (or 1.11 lb).

Camera Weight
Nikon D7100 675 gr
1.49 lb
Nikon D3100 505 gr
1.11 lb

Nikon D7100 vs Nikon D3100 Specs

Below you will find the complete and detailed technical specs for both Nikon D7100 and Nikon D3100, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product
Nikon D7100
Nikon D3100
Name Nikon D7100 Nikon D3100
Manufacturer Nikon Nikon
Release Date and Price
Nikon D7100
Nikon D3100
Release Year 2013 2010
Release Date 2013-02-21 2010-08-19
MSRP 1199 USD 699 USD
Buy it today
Camera Type
Nikon D7100
Nikon D3100
Camera Type DSLR DSLR
Sensor
Nikon D7100
Nikon D3100
Sensor Size APS-C (approx 23.7 x 15.5 mm)
Also known as "DX"
APS-C (approx 23.7 x 15.5 mm)
Also known as "DX"
Sensor Type CMOS CMOS
Resolution 6000 x 4000 pixels 4608 x 3072 pixels
Megapixels 24,1 MP 14,2 MP
Image Processor EXPEED 3 EXPEED 2
Image
Nikon D7100
Nikon D3100
ISO Range 100 - 6400 100 - 12800
White Balance Presets 12 12
Custom White Balance Yes Yes
Image Stabilization No No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Nikon D7100
Nikon D3100
Autofocus Motor Yes No
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Face Detection
LiveView
Contract Detect (sensor)
Phase Detect
Multi Area
Selective Single Point
Tracking
Single
Continuous
Face Detection
LiveView
Focus Points 51 11
Lens Mount Nikon F

See Compatible Lenses
Nikon F

See Compatible Lenses
Focal Length Multiplier DX / APS-C (1.5x)
1.5x multiplier
Example:
24 mm becomes 36 mm
50 mm becomes 75 mm
100 mm becomes 150 mm
200 mm becomes 300 mm
DX / APS-C (1.5x)
1.5x multiplier
Example:
24 mm becomes 36 mm
50 mm becomes 75 mm
100 mm becomes 150 mm
200 mm becomes 300 mm
Screen & Viewfinder
Nikon D7100
Nikon D3100
Articulated LCD Fixed Fixed
Screen size 3,2 3
Screen dots 1228800 230000
Touch screen No No
Screen type Wide Viewing Angle TFT-LCD monitor TFT LCD monitor
Live view Yes Yes
Viewfinder Type Optical (pentaprism) Optical (pentamirror)
Viewfinder Coverage 100% 95%
Viewfinder Magnification 0.94 0.8 (0.53 35mm equiv.)
Viewfinder Resolution N/A N/A
Photography features
Nikon D7100
Nikon D3100
Frames per second 6 fps 3 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 seconds 1/4000 seconds
Built-in Flash Yes Yes
Built-in Flash Range 12 meters 12 meters
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes No
Metering modes Multi
Center Weighted
Spot
Average
Multi
Center Weighted
Average
Exposure Compensation +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 5 (at 1/3 EV steps)
Videography features
Nikon D7100
Nikon D3100
Video recording Yes Yes
Video format MPEG4
H.264
MPEG4
Video resolution 1280 x 720
1920 x 1080
1280 x 720
1920 x 1080
Built-in Microphone Yes Yes
Built-in Speakers Yes No
Storage
Nikon D7100
Nikon D3100
Memory Card SD/SDHC
SD/SDHC
Connectivity
Nikon D7100
Nikon D3100
HDMI Output Yes Yes
Microphone Port Yes No
Headphone Port Yes No
Wireless Yes
Wireless WR-1 and WR-R10
Yes
Eye-Fi Connected
Remote Control Yes (Optional, wired MC-DC2 or wireless WR-1 and WR-R10 )
Optional
GPS Yes
Optional
Yes
Optional
Body & Dimensions
Nikon D7100
Nikon D3100
Enviromentally sealed Yes No
Battery Battery Pack Battery Pack
Battery Details Lithium-Ion EN-EL15 rechargeable battery & charger
Lithium-Ion EN-EL14 rechargeable battery & charger
Battery Life (CIPA) 950 shots N/A
Width 136 mm 124 mm
Height 107 mm 96 mm
Depth 76 mm 75 mm
Weight 675 gram 505 gram