Nikon D3100 vs Nikon D40x
These cameras are both manufacturered by Nikon.Nikon D3100 were released 2010 and Nikon D40x was released 2007. That is a 3 years difference. In tech, this period of time can be of interest since technology is always improving etc.
Type of camera
Both these cameras are DSLR cameras. No difference there.
Sensors / crop factor
Both these cameras have the same sorts sensor (called "DX") which means that if you compare the cameras side by side the lenses will also have the same experienced focal length. Neither of the cameras have a Full frame sensor which means that you will get a "crop factor" where the cameras sensor size effect the focal length with a multiplier.
|Camera||Experienced focal length when using a lens with 50mm focal length (ex a common "50mm f/1.8")|
|Nikon D3100||75 mm||(a Nikon DX sensor have a crop factor / focal length multiplier by * 1.5)|
|Nikon D40x||75 mm||(a Nikon DX sensor have a crop factor / focal length multiplier by * 1.5)|
Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Nikon)
|Camera||Megapixels||Pixel (total)||Pixels (width)||Pixels (height)|
|Nikon D3100||14,2 MP||14155776||4608||3072|
|Nikon D40x||10 MP||10036224||3872||2592|
Nikon D3100 has a 41 % larger resolution than Nikon D40x. This could give you more details in the picture but also a possibility to crop more in the pictures, afterwards while editing the pictures, if needed that is.
Autofocus and lens compatibility
Neither of these two cameras have a built-in autofocus motor. Some lenses, that supports autofocus, does not have a autofocus motor of their own and often they rely on the cameras providing this autofocus motor but since these two camera models does not have this either it will result in no autofocus is possible.
Pictures per second
Depending on what you are shooting the FPS, or frames/pictures per second, can definately be of interest. Nikon D3100 can shoot up to 3 pictures per seconds and Nikon D40x can shoot up to 3 pictures per seconds.
|Camera||FPS (Frames per second)|
Ability to record movies
It is becoming more and more popular to record movies with digital cameras.
The weight of the camera can be an extremely important factor, especially if the camera is about to be used, carried around, for several hours at the time.
|Camera||Weight (in gram)||Weight (in pounds)|
|Nikon D3100||505 gr||1,11 lb|
|Nikon D40x||522 gr||1,15 lb|