Head to head · specs cited · drawn to scale
Fujifilm GFX 100S vs Fujifilm X-S20
Every spec below is quoted from the makers' official pages — where a figure isn't published we say so rather than guess. Sizes are drawn at true relative scale from published dimensions, and the bag-fit row is computed against our measured bag catalog.
The 3 biggest published differences
- Resolution (MP): the GFX 100S leads at 102 million effective pixels vs the X-S20's 26.1.
- Burst — electronic: the X-S20 leads at Approx. 30fps (1.25x Crop) vs the GFX 100S's Approx. 2.9fps.
- Weight (body): the X-S20 leads at 491 g vs the GFX 100S's 900 g.
 GFX 100S Fujifilm G |  X-S20 Fujifilm X | |
|---|---|---|
| Overview | ||
| Type | Mirrorless | Mirrorless |
| Format | Medium format (43.8mm x 32.9mm) | APS-C (X-Trans), 23.5mm x 15.6mm |
| Lens mount | Fujifilm G | Fujifilm X |
| Released | —, not published | —, not published |
| Sensor & Image | ||
| Sensor type | 43.8mm x 32.9mm Bayer array with primary color filter | X-Trans CMOS 4 with primary color filter |
| Sensor size | Medium format (43.8mm x 32.9mm) | APS-C (X-Trans), 23.5mm x 15.6mm |
| Resolution (MP) | 102 million effective pixels | 26.1 |
| In-body stabilisation | 6.0 stops (Image sensor shift mechanism with 5-axis compensation) | 7.0 stops |
| ISO range | ISO100~12800 (1/3 step), extended ISO50 to ISO102400 | 160 |
| Autofocus & Speed | ||
| AF system | Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF) | Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF) |
| Subject detection | Face/eye detection: Yes | Animal/Bird/Automobile/Motorcycle&Bike/Airplane/Train |
| Burst — mechanical | Approx. 5.0fps | Approx. 8fps |
| Burst — electronic | Approx. 2.9fps | Approx. 30fps (1.25x Crop) |
| Video | ||
| Max video | DCI4K(17:9) 4096x2160 / 4K(16:9) 3840x2160 | 6.2K 30p (3:2, 29.97p/25p/24p/23.98p) |
| Codecs / sampling | HEVC/H.265 and MPEG-4 AVC/H.264 | H.265/HEVC, H.264/AVC, Linear PCM, AAC |
| Recording limit | Up to 120min. | 6.2K: Approx. 120min. (29.97p); 4K: Approx. 110min. (59.94p) |
| Viewfinder & Screen | ||
| EVF resolution | Approx. 3.69 million dots | Approx. 2.36 million dots |
| EVF magnification | 0.77x with 50mm Lens (35mm Equivalent) | 0.62x |
| Rear screen | 3.2 inch Tilt-Type (Three Direction) Touch Screen Color LCD Monitor, Approx. 2.36 million dots | 3.0 inch vari-angle Touch Screen Color LCD Monitor, Approx. 1.84 million dots |
| Body & Handling | ||
| Dimensions (W×H×D) | 150 × 104.2 × 87.2 mm | 127.7 × 85.1 × 65.4 mm |
| Weight (body) | 900 g | 491 g |
| Weather sealing | —, not published | —, not published |
| Shutter durability | —, not published | —, not published |
| Power & Storage | ||
| Battery life (CIPA) | Approx. 460 frames | Approx. 750 frames (Normal Mode) |
| Battery | NP-W235 Li-ion | NP-W235 Li-ion battery |
| Card slots | SD Card (-2GB), SDHC Card (-32GB), SDXC Card (-2TB); UHS-I, UHS-II, Video Speed Class V90 (slot count not published) | 1x SD/SDHC/SDXC, UHS-I/II |
| Connectivity | ||
| USB | USB Type-C (USB3.2 Gen1x1) | USB Type-C (USB3.2 Gen2x1) |
| Wireless | IEEE802.11b/g/n; Bluetooth Ver. 4.2 | IEEE802.11a/b/g/n/ac, Bluetooth Ver. 4.2 |
| HDMI | HDMI Micro connector (Type D) | HDMI Micro connector (Type D) |
| Price | ||
| Launch price | —, not published | —, not published |
| Size, to scale | ||
Front view, drawn at the same scale from each maker's published W×H (mm). | ||
| Smallest bag that fits | ||
| Body + standard zoom | Think Tank Mirrorless Mover 25 V2 Fits body only · View at B&H Photo Video | Tenba BYOB 9 Camera Insert Fits with 16-80 f/4 · View at B&H Photo Video |
Sources
official · GFX 100S specifications: Fujifilm (official global specifications page) · accessed 2026-07-10
“102 million effective pixels / Image sensor shift mechanism with 5-axis compensation, 6.0 stops / Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF) / Approx. 5.0fps (mechanical), Approx. 2.9fps (electronic)”
“X-Trans CMOS 4 with primary color filter, 26.1 millions pixels, ISO160, Approx. 8fps, Approx. 30fps (1.25x Crop), 6.2K 3:2 at 29.97p, Approx. 2.36 million dots, Approx. 750 frames (Normal Mode), NP-W235 Li-ion battery”
Spec values are the manufacturers' published figures, compared factually — we don't rank cameras. Fit verdicts are planning estimates from published interior dimensions, not guarantees. See methodology.
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