Sony a550 vs Nikon D750

This is a full comparison between the cameras Sony a550 and Nikon D750. We compare them by looking at the categories you see below.

Sony a550

Nikon D750

Manufacturing

Sony a550 is manufacturered by Sony but Nikon D750 is from Nikon. Both Sony and Nikon are well known brands though.

Sony a550 were released 2009 and Nikon D750 was released 2014. That is a 5 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a550	2009
Nikon D750	2014

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Sony a550 has a "Sony APS-C"-sensor while Nikon D750 has a "Nikon FX"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

Camera	Focal length, 50mm f/1.8 **
Sony a550	75 mm Sony APS-C sensor Crop factor/focal length multiplier by * 1.5
Nikon D750	50 mm Full-frame sensor No crop factor/focal length multiplier

** 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 (Sony)
Camera selection can affect the focal length (Nikon)

Resolution

Sony a550 has a 14 MP (Megapixels) resolution while Nikon D750 has 24 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a550	14 MP 14033152 pixels 4592 x 3056
Nikon D750	24 MP 24160256 pixels 6016 x 4016

Nikon D750 has a 72 % larger resolution than Sony a550. 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 D750 has a larger ISO-range than Sony a550. Nikon D750 has an ISO range that stretches from 100 to 12800 while Sony a550 has 200 to 12800.

Camera	ISO Range
Sony a550	200-12800
Nikon D750	100-12800

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a550
Lens compatibility chart for Nikon D750

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a550 can shoot up to 7 pictures per seconds and Nikon D750 can shoot up to 6,5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a550	7
Nikon D750	6,5

Ability to record movies

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

It is only one of these two cameras that support recording movies and movie clips and that is Nikon D750. Sadly, the Sony a550 does not support this.

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 D750 weighs 750 gr (equal to 1.65 lb) which is 19% heavier than Sony a550 and its 632 gr (or 1.39 lb).

Camera	Weight
Sony a550	632 gr 1.39 lb
Nikon D750	750 gr 1.65 lb