Sony a7R vs Sony a33

This is a full comparison between the cameras Sony a7R and Sony a33. We compare them by looking at the categories you see below.

Sony a7R

Sony a33

Manufacturing

These cameras are both manufactured by Sony.

Sony a7R were released 2013 and Sony a33 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
Sony a7R	2013
Sony a33	2010

Type of camera

Sensors / crop factor

These cameras have different sensors. Sony a7R has a "Sony Full Frame"-sensor while Sony a33 has a "Sony APS-C"-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 a7R	50 mm Full-frame sensor No crop factor/focal length multiplier
Sony a33	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 a7R has a 36 MP (Megapixels) resolution while Sony a33 has 14 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R	36 MP 36152320 pixels 7360 x 4912
Sony a33	14 MP 14033152 pixels 4592 x 3056

Sony a7R has a 158 % larger resolution than Sony a33. 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 a7R has a larger ISO-range than Sony a33. Sony a7R has an ISO range that stretches from 100 to 25600 while Sony a33 has 100 to 12800.

Camera	ISO Range
Sony a7R	100-25600
Sony a33	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 a7R
Lens compatibility chart for Sony a33

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R can shoot up to 4 pictures per seconds and Sony a33 can shoot up to 7 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R	4
Sony a33	7

Ability to record movies

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

In this case, both Sony a7R and Sony a33 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.

Sony a33 weighs 500 gr (equal to 1.1 lb) which is 8% heavier than Sony a7R and its 465 gr (or 1.03 lb).

Camera	Weight
Sony a7R	465 gr 1.03 lb
Sony a33	500 gr 1.1 lb