Fujifilm GFX 100S vs Fujifilm X-A3

This is a full comparison between the cameras Fujifilm GFX 100S and Fujifilm X-A3. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Fujifilm.

Type of camera

Both these cameras are Mirrorless cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Fujifilm GFX 100S has a "Fujifilm Medium Format"-sensor while Fujifilm X-A3 has a "Fujifilm APS-C"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

** 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 Fujifilm X-A3 has 24 MP. If we break down this in more detail this is the data behind the numbers:

Fujifilm GFX 100S has a 324 % larger resolution than Fujifilm X-A3. 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 Fujifilm X-A3. Fujifilm GFX 100S has an ISO range that stretches from 100 to 12800 while Fujifilm X-A3 has 200 to 6400.

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 Fujifilm X-A3

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 Fujifilm X-A3 can shoot up to 6 pictures per seconds.

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 Fujifilm X-A3 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 165% heavier than Fujifilm X-A3 and its 339 gr (or 0.75 lb).

Fujifilm GFX 100S vs Fujifilm X-A3 Specs

Below you will find the complete and detailed technical specs for both Fujifilm GFX 100S and Fujifilm X-A3, 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	Fujifilm X-A3
Name	Fujifilm GFX 100S	Fujifilm X-A3
Manufacturer	Fujifilm	Fujifilm
Release Date and Price	Fujifilm GFX 100S	Fujifilm X-A3
Release Year	2021	2016
Release Date	2021-01-27	2016-08-25
MSRP	5999 USD	599 USD
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Camera Type	Fujifilm GFX 100S	Fujifilm X-A3
Camera Type	Mirrorless	Mirrorless
Sensor	Fujifilm GFX 100S	Fujifilm X-A3
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	6000 x 4000 pixels
Megapixels	102 MP	24 MP
Image Processor	X-Processor 4	EXR Processor II
Image	Fujifilm GFX 100S	Fujifilm X-A3
ISO Range	100 - 12800	200 - 6400
White Balance Presets	7	7
Custom White Balance	Yes	Yes
Image Stabilization	Yes (Sensor-Shift)	No
Image Stabilization CIPA Rating	6 stops	0 stops
Uncompressed format	RAW + TIFF	RAW
Optics & Focus	Fujifilm GFX 100S	Fujifilm X-A3
Autofocus Motor	Yes	Yes
Autofocus	Contract Detect (sensor) Phase Detect Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView	Contract Detect (sensor) Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView
Focus Points	425	77
Lens Mount	Fujifilm G See Compatible Lenses	Fujifilm X 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	Fujifilm X-A3
Articulated LCD	Tilting	Tilting
Screen size	3.2”	3”
Screen dots	2360000	1040000
Touch screen	Yes	Yes
Screen type	TFT LCD	TFT LCD
Live view	Yes	Yes
Viewfinder Type	Electronic	No Viewfinder
Viewfinder Coverage	100%
Viewfinder Magnification	0.61× (0.77× 35mm equiv.)
Viewfinder Resolution	3690000	0
Photography features	Fujifilm GFX 100S	Fujifilm X-A3
Frames per second	5 fps	6 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	7 meters
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	Yes	No
Metering modes	Multi Center Weighted Spot Average	Multi Spot Average
Exposure Compensation	+/- 5 (at 1/3 EV steps)	+/- 3 (at 1/3 EV steps)
Videography features	Fujifilm GFX 100S	Fujifilm X-A3
Video recording	Yes	Yes
Video format	MPEG4 H.264 H.265	MPEG4 H.264
Video resolution	1920 x 1080 3840 x 2160 4096 x 2160	1280 x 720 1920 x 1080
Built-in Microphone	Yes	Yes
Built-in Speakers	Yes	Yes
Storage	Fujifilm GFX 100S	Fujifilm X-A3
Memory Card	SD/SDHC	SD/SDHC
Connectivity	Fujifilm GFX 100S	Fujifilm X-A3
HDMI Output	Yes	Yes
Microphone Port	Yes	No
Headphone Port	Yes	No
Wireless	Yes Built-in (802.11 b/g/n + Bluetooth)	Yes Built-in (802.11b/g/n)
Remote Control	Supported (no further information)	Yes (wired or via smartphone)
GPS	No	No
Body & Dimensions	Fujifilm GFX 100S	Fujifilm X-A3
Enviromentally sealed	Yes	No
Battery	Battery Pack	Battery Pack
Battery Details	NP-W235 lithium-ion battery & charger	NP-W126S lithium-ion battery & USB charger
Battery Life (CIPA)	460 shots	410 shots
Width	150 mm	117 mm
Height	104 mm	67 mm
Depth	87 mm	40 mm
Weight	900 gram	339 gram