Fujifilm GFX 100S vs Sony a55

This is a full comparison between the cameras Fujifilm GFX 100S and Sony a55. We compare them by looking at the categories you see below.

Manufacturing

Fujifilm GFX 100S is manufacturered by Fujifilm but Sony a55 is from Sony. Both Fujifilm and Sony are well known brands though.

Fujifilm GFX 100S were released 2021 and Sony a55 was released 2010. That is a 11 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Fujifilm GFX 100S 2021
Sony a55 2010

Type of camera

Sensors / crop factor

These cameras have different sensors. Fujifilm GFX 100S has a "Fujifilm Medium Format"-sensor while Sony a55 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 **
Fujifilm GFX 100S 39.5 mm
Fujifilm Medium Format sensor
Crop factor/focal length multiplier by * 0.79
Sony a55 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:

Resolution

Fujifilm GFX 100S has a 102 MP (Megapixels) resolution while Sony a55 has 16 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Fujifilm GFX 100S 102 MP
101756928 pixels
11648 x 8736
Sony a55 16 MP
16032768 pixels
4912 x 3264

Fujifilm GFX 100S has a 535 % larger resolution than Sony a55. 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

Both of these cameras offer the exact same ISO range. They both have 100 to 12800.

Camera ISO Range
Fujifilm GFX 100S 100-12800
Sony a55 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 Fujifilm GFX 100S
Lens compatibility chart for Sony a55

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Fujifilm GFX 100S can shoot up to 5 pictures per seconds and Sony a55 can shoot up to 10 pictures per seconds.

Camera FPS (Frames per second)
Fujifilm GFX 100S 5
Sony a55 10

Ability to record movies

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

In this case, both Fujifilm GFX 100S and Sony a55 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.

Fujifilm GFX 100S weighs 900 gr (equal to 1.98 lb) which is 80% heavier than Sony a55 and its 500 gr (or 1.1 lb).

Camera Weight
Fujifilm GFX 100S 900 gr
1.98 lb
Sony a55 500 gr
1.1 lb

Fujifilm GFX 100S vs Sony a55 Specs

Below you will find the complete and detailed technical specs for both Fujifilm GFX 100S and Sony a55, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product
Fujifilm GFX 100S
Sony a55
Name Fujifilm GFX 100S Sony a55
Manufacturer Fujifilm Sony
Release Date and Price
Fujifilm GFX 100S
Sony a55
Release Year 2021 2010
Release Date 2021-01-27 2010-08-24
MSRP 5999 USD 749 USD
Buy it today
Camera Type
Fujifilm GFX 100S
Sony a55
Camera Type Mirrorless SLT
Sensor
Fujifilm GFX 100S
Sony a55
Sensor Size Medium Format (approx 44 x 33 mm) APS-C (approx 23.5 x 15.6 mm)
Sensor Type BSI-CMOS CMOS
Resolution 11648 x 8736 pixels 4912 x 3264 pixels
Megapixels 102 MP 16 MP
Image Processor X-Processor 4 Bionz
Image
Fujifilm GFX 100S
Sony a55
ISO Range 100 - 12800 100 - 12800
White Balance Presets 7 6
Custom White Balance Yes Yes
Image Stabilization Yes
(Sensor-Shift)
Yes
(Sensor-Shift)
Image Stabilization CIPA Rating 6 stops 0 stops
Uncompressed format RAW + TIFF RAW
Optics & Focus
Fujifilm GFX 100S
Sony a55
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Touch
Face Detection
LiveView
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Face Detection
LiveView
Focus Points 425 15
Lens Mount Fujifilm G

See Compatible Lenses
Sony A

See Compatible Lenses
Focal Length Multiplier Medium Format
0.79x multiplier
Example:
24 mm becomes 19 mm
50 mm becomes 40 mm
100 mm becomes 79 mm
200 mm becomes 158 mm
APS-C Sensor (1.5x)
1.5x multiplier
Example:
24 mm becomes 36 mm
50 mm becomes 75 mm
100 mm becomes 150 mm
200 mm becomes 300 mm
Screen & Viewfinder
Fujifilm GFX 100S
Sony a55
Articulated LCD Tilting Fully articulated
Screen size 3.2” 3”
Screen dots 2360000 921000
Touch screen Yes No
Screen type TFT LCD N/A
Live view Yes Yes
Viewfinder Type Electronic Electronic
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.61× (0.77× 35mm equiv.) 1.1× (0.73× 35mm equiv.)
Viewfinder Resolution 3690000 N/A
Photography features
Fujifilm GFX 100S
Sony a55
Frames per second 5 fps 10 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/4000 seconds 1/4000 seconds
Built-in Flash No Yes
Built-in Flash Range N/A 10 meters
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes No
Metering modes Multi
Center Weighted
Spot
Average
Multi
Center Weighted
Spot
Exposure Compensation +/- 5 (at 1/3 EV steps) +/- 2 (at 1/3 EV steps)
Videography features
Fujifilm GFX 100S
Sony a55
Video recording Yes Yes
Video format MPEG4
H.264
H.265
MPEG4
H.264
AVCHD
Video resolution 1920 x 1080
3840 x 2160
4096 x 2160
1440 x 1080
1920 x 1080
Built-in Microphone Yes Yes
Built-in Speakers Yes No
Storage
Fujifilm GFX 100S
Sony a55
Memory Card SD/SDHC
Memory Stick Pro Duo
SD/SDHC
Connectivity
Fujifilm GFX 100S
Sony a55
HDMI Output Yes Yes
Microphone Port Yes No
Headphone Port Yes No
Wireless Yes
Built-in (802.11 b/g/n + Bluetooth)
Yes
Eye-Fi Connected
Remote Control Supported (no further information) Yes (Optional)
GPS No Yes
Built-in
Body & Dimensions
Fujifilm GFX 100S
Sony a55
Enviromentally sealed Yes No
Battery Battery Pack Battery Pack
Battery Details NP-W235 lithium-ion battery & charger
Rechargeable NP-FW50 battery & charger
Battery Life (CIPA) 460 shots 380 shots
Width 150 mm 124 mm
Height 104 mm 92 mm
Depth 87 mm 85 mm
Weight 900 gram 500 gram