Sony a77 vs Sony a390

This is a full comparison between the cameras Sony a77 and Sony a390. We compare them by looking at the categories you see below.

Sony a77

Sony a390

Manufacturing

These cameras are both manufactured by Sony.

Sony a77 were released 2011 and Sony a390 was released 2010. That is a 1 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a77	2011
Sony a390	2010

Type of camera

Sensors / crop factor

Both these cameras have the same sorts of sensor (called "Sony APS-C") 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 **
Sony a77	75 mm Sony APS-C sensor Crop factor/focal length multiplier by * 1.5
Sony a390	75 mm Sony APS-C 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 (Sony)

Resolution

Sony a77 has a 24 MP (Megapixels) resolution while Sony a390 has 14 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a77	24 MP 24000000 pixels 6000 x 4000
Sony a390	14 MP 14033152 pixels 4592 x 3056

Sony a77 has a 71 % larger resolution than Sony a390. 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

Sony a77 has a larger ISO-range than Sony a390. Sony a77 has an ISO range that stretches from 100 to 16000 while Sony a390 has 100 to 3200.

Camera	ISO Range
Sony a77	100-16000
Sony a390	100-3200

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 a77
Lens compatibility chart for Sony a390

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a77 can shoot up to 12 pictures per seconds and Sony a390 can shoot up to 2,5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a77	12
Sony a390	2,5

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 Sony a77. Unfortunately Sony a390 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.

Sony a77 weighs 732 gr (equal to 1.61 lb) which is 33% heavier than Sony a390 and its 549 gr (or 1.21 lb).

Camera	Weight
Sony a77	732 gr 1.61 lb
Sony a390	549 gr 1.21 lb