Nikon D5100 vs Nikon D40x

This is a full comparison between the cameras Nikon D5100 and Nikon D40x. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Nikon.

Nikon D5100 were released 2011 and Nikon D40x was released 2007. That is a 4 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Nikon D5100 2011
Nikon D40x 2007

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 D5100 75 mm
Nikon DX sensor
Crop factor/focal length multiplier by * 1.5
Nikon D40x 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 D5100 has a 16,2 MP (Megapixels) resolution while Nikon D40x has 10 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Nikon D5100 16,2 MP
16084992 pixels
4928 x 3264
Nikon D40x 10 MP
10036224 pixels
3872 x 2592

Nikon D5100 has a 60 % larger resolution than Nikon D40x. 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 D5100 has a larger ISO-range than Nikon D40x. Nikon D5100 has an ISO range that stretches from 100 to 6400 while Nikon D40x has 100 to 3200.

Camera ISO Range
Nikon D5100 100-6400
Nikon D40x 100-3200

Autofocus and lens compatibility

Neither of these two cameras has a built-in autofocus motor. Some lenses, that supports autofocus, do not have an autofocus motor of their own, and often they rely on the cameras providing this autofocus motor but since these two camera models do not have this either it will result in no autofocus is possible.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Nikon D5100
Lens compatibility chart for Nikon D40x

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Nikon D5100 can shoot up to 4 pictures per seconds and Nikon D40x can shoot up to 3 pictures per seconds.

Camera FPS (Frames per second)
Nikon D5100 4
Nikon D40x 3

Ability to record movies

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

When comparing these two cameras there is only one of them that can shoot movies and that is Nikon D5100. Unfortunately Nikon D40x does not support recording movies and movie clips.

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 D5100 weighs 611 gr (equal to 1.35 lb) which is 17% heavier than Nikon D40x and its 522 gr (or 1.15 lb).

Camera Weight
Nikon D5100 611 gr
1.35 lb
Nikon D40x 522 gr
1.15 lb

Nikon D5100 vs Nikon D40x Specs

Below you will find the complete and detailed technical specs for both Nikon D5100 and Nikon D40x, 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 D5100
Nikon D40x
Name Nikon D5100 Nikon D40x
Manufacturer Nikon Nikon
Release Date and Price
Nikon D5100
Nikon D40x
Release Year 2011 2007
Release Date 2011-04-05 2007-03-06
MSRP 359 USD 729 USD
Buy it today
Camera Type
Nikon D5100
Nikon D40x
Camera Type DSLR DSLR
Sensor
Nikon D5100
Nikon D40x
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 CCD
Resolution 4928 x 3264 pixels 3872 x 2592 pixels
Megapixels 16,2 MP 10 MP
Image Processor EXPEED 2 EXPEED
Image
Nikon D5100
Nikon D40x
ISO Range 100 - 6400 100 - 3200
White Balance Presets 12 6
Custom White Balance Yes Yes
Image Stabilization No No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Nikon D5100
Nikon D40x
Autofocus Motor No No
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Face Detection
LiveView
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Focus Points 11 3
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 D5100
Nikon D40x
Articulated LCD Fully articulated Fixed
Screen size 3# 2,5”
Screen dots 921000 230000
Touch screen No No
Screen type TFT LCD monitor N/A
Live view Yes No
Viewfinder Type Optical (pentamirror) Optical (pentamirror)
Viewfinder Coverage 95% 95%
Viewfinder Magnification 0.78× (0.52× 35mm equiv.) 0.8× (0.53× 35mm equiv.)
Viewfinder Resolution N/A N/A
Photography features
Nikon D5100
Nikon D40x
Frames per second 4 fps 3 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/4000 seconds 1/4000 seconds
Built-in Flash Yes Yes
Built-in Flash Range 12 meters 17 meters
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes Yes
Metering modes Multi
Center Weighted
Spot
Multi
Center Weighted
Spot
Exposure Compensation +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 5 (at 1/3 EV steps)
Videography features
Nikon D5100
Nikon D40x
Video recording Yes No
Video format MPEG4
N/A
Video resolution 1280 x 720
1920 x 1080
N/A
Built-in Microphone Yes No
Built-in Speakers Yes No
Storage
Nikon D5100
Nikon D40x
Memory Card SD/SDHC
SD/SDHC
Connectivity
Nikon D5100
Nikon D40x
HDMI Output Yes No
Microphone Port Yes No
Headphone Port No No
Wireless Yes
Eye-Fi Connected
No
Remote Control Yes (Optional ML-L3)
Yes (Optional (ML-L3))
GPS Yes
Optional with GP-1
No
Body & Dimensions
Nikon D5100
Nikon D40x
Enviromentally sealed No No
Battery Battery Pack Battery Pack
Battery Details Lithium-Ion EN-EL14 rechargeable battery & charger
Nikon EN-EL9 Lithium-Ion & charger included
Battery Life (CIPA) N/A 520 shots
Width 128 mm 124 mm
Height 97 mm 94 mm
Depth 79 mm 64 mm
Weight 611 gram 522 gram