Fujifilm X-T100 vs Sony a7R IIIA

This is a full comparison between the cameras Fujifilm X-T100 and Sony a7R IIIA. We compare them by looking at the categories you see below.

Fujifilm X-T100

Sony a7R IIIA

Manufacturing

Fujifilm X-T100 is manufacturered by Fujifilm but Sony a7R IIIA is from Sony. Both Fujifilm and Sony are well known brands though.

Fujifilm X-T100 were released 2018 and Sony a7R IIIA was released 2021. That is a 3 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Fujifilm X-T100	2018
Sony a7R IIIA	2021

Type of camera

Both these cameras are Mirrorless cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Fujifilm X-T100 has a "Fujifilm APS-C"-sensor while Sony a7R IIIA has a "Sony Full Frame"-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 **
Fujifilm X-T100	75 mm Fujifilm sensor Crop factor/focal length multiplier by * 1.5
Sony a7R IIIA	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:

Resolution

Fujifilm X-T100 has a 24 MP (Megapixels) resolution while Sony a7R IIIA has 42 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Fujifilm X-T100	24 MP 24000000 pixels 6000 x 4000
Sony a7R IIIA	42 MP 42177408 pixels 7952 x 5304

Sony a7R IIIA has a 76 % larger resolution than Fujifilm X-T100. 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 IIIA has a larger ISO-range than Fujifilm X-T100. Sony a7R IIIA has an ISO range that stretches from 100 to 32000 while Fujifilm X-T100 has 200 to 12800.

Camera	ISO Range
Fujifilm X-T100	200-12800
Sony a7R IIIA	100-32000

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 Fujifilm X-T100
Lens compatibility chart for Sony a7R IIIA

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Fujifilm X-T100 can shoot up to 6 pictures per seconds and Sony a7R IIIA can shoot up to 10 pictures per seconds.

Camera	FPS (Frames per second)
Fujifilm X-T100	6
Sony a7R IIIA	10

Ability to record movies

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

In this case, both Fujifilm X-T100 and Sony a7R IIIA 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 a7R IIIA weighs 657 gr (equal to 1.45 lb) which is 47% heavier than Fujifilm X-T100 and its 448 gr (or 0.99 lb).

Camera	Weight
Fujifilm X-T100	448 gr 0.99 lb
Sony a7R IIIA	657 gr 1.45 lb