Fujifilm GFX 100S vs Sony a900

This is a full comparison between the cameras Fujifilm GFX 100S and Sony a900. We compare them by looking at the categories you see below.


Fujifilm GFX 100S is manufacturered by Fujifilm but Sony a900 is from Sony. Both Fujifilm and Sony are well known brands though.

Fujifilm GFX 100S were released 2021 and Sony a900 was released 2008. That is a 13 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Fujifilm GFX 100S 2021
Sony a900 2008

Type of camera

Fujifilm GFX 100S is a Mirrorless camera while Sony a900 is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Fujifilm GFX 100S has a "Fujifilm Medium Format"-sensor while Sony a900 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 GFX 100S 39.5 mm
Fujifilm Medium Format sensor
Crop factor/focal length multiplier by * 0.79
Sony a900 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:


Fujifilm GFX 100S has a 102 MP (Megapixels) resolution while Sony a900 has 25 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 a900 25 MP
24385536 pixels
6048 x 4032

Fujifilm GFX 100S has a 317 % larger resolution than Sony a900. 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

Fujifilm GFX 100S has a larger ISO-range than Sony a900. Fujifilm GFX 100S has an ISO range that stretches from 100 to 12800 while Sony a900 has 100 to 1600.

Camera ISO Range
Fujifilm GFX 100S 100-12800
Sony a900 100-1600

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 a900

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 a900 can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Fujifilm GFX 100S 5
Sony a900 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 Fujifilm GFX 100S. Unfortunately Sony a900 does not support recording movies and movie clips.


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 1% heavier than Sony a900 and its 895 gr (or 1.97 lb).

Camera Weight
Fujifilm GFX 100S 900 gr
1.98 lb
Sony a900 895 gr
1.97 lb

Fujifilm GFX 100S vs Sony a900 Specs

Below you will find the complete and detailed technical specs for both Fujifilm GFX 100S and Sony a900, 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.

Fujifilm GFX 100S
Sony a900
Name Fujifilm GFX 100S Sony a900
Manufacturer Fujifilm Sony
Release Date and Price
Fujifilm GFX 100S
Sony a900
Release Year 2021 2008
Release Date 2021-01-27 2008-09-09
MSRP 5999 USD 2999 USD
Buy it today
Camera Type
Fujifilm GFX 100S
Sony a900
Camera Type Mirrorless DSLR
Fujifilm GFX 100S
Sony a900
Sensor Size Medium Format (approx 44 x 33 mm) Full Frame (approx 36 x 24 mm)
Resolution 11648 x 8736 pixels 6048 x 4032 pixels
Megapixels 102 MP 25 MP
Image Processor X-Processor 4 Bionz
Fujifilm GFX 100S
Sony a900
ISO Range 100 - 12800 100 - 1600
White Balance Presets 7 7
Custom White Balance Yes Yes
Image Stabilization Yes
Image Stabilization CIPA Rating 6 stops 0 stops
Uncompressed format RAW + TIFF RAW
Optics & Focus
Fujifilm GFX 100S
Sony a900
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Selective Single Point
Face Detection
Phase Detect
Multi Area
Selective Single Point
Focus Points 425 9
Lens Mount Fujifilm G

See Compatible Lenses
Sony A

See Compatible Lenses
Focal Length Multiplier Medium Format
0.79x multiplier
24 mm becomes 19 mm
50 mm becomes 40 mm
100 mm becomes 79 mm
200 mm becomes 158 mm
Full frame
No multiplier
24 mm remains 24 mm
50 mm remains 50 mm
100 mm remains 100 mm
200 mm remains 200 mm
Screen & Viewfinder
Fujifilm GFX 100S
Sony a900
Articulated LCD Tilting Fixed
Screen size 3.2 3
Screen dots 2360000 921600
Touch screen Yes No
Screen type TFT LCD TFT Xtra Fine color LCD
Live view Yes No
Viewfinder Type Electronic Optical (pentaprism)
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.61 (0.77 35mm equiv.) 0.74x
Viewfinder Resolution 3690000 N/A
Photography features
Fujifilm GFX 100S
Sony a900
Frames per second 5 fps 5 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/4000 seconds 1/8000 seconds
Built-in Flash No No
Built-in Flash Range N/A N/A
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes No
Metering modes Multi
Center Weighted
Center Weighted
Exposure Compensation +/- 5 (at 1/3 EV steps) +/- 3 (at 1/3 EV steps)
Videography features
Fujifilm GFX 100S
Sony a900
Video recording Yes No
Video format MPEG4
Video resolution 1920 x 1080
3840 x 2160
4096 x 2160
Built-in Microphone Yes No
Built-in Speakers Yes No
Fujifilm GFX 100S
Sony a900
Memory Card SD/SDHC
Compact Flash
Memory Stick Pro Duo
Fujifilm GFX 100S
Sony a900
HDMI Output Yes Yes
Microphone Port Yes No
Headphone Port Yes No
Wireless Yes
Built-in (802.11 b/g/n + Bluetooth)
Remote Control Supported (no further information) Yes (Wired or Wireless (Optional))
Body & Dimensions
Fujifilm GFX 100S
Sony a900
Enviromentally sealed Yes Yes
Battery Battery Pack Battery Pack
Battery Details NP-W235 lithium-ion battery & charger
Lithium-Ion NP-FM500H rechargeable battery & charger
Battery Life (CIPA) 460 shots 880 shots
Width 150 mm 156 mm
Height 104 mm 117 mm
Depth 87 mm 82 mm
Weight 900 gram 895 gram