The Fujifilm GFX 50S uses the Fujifilm G mount with a 0.79× crop factor (about 43.8 × 32.9 mm sensor), 51.4 megapixels, announced in 2017. Below: equivalent focal lengths, maximum shutter speeds for sharp stars, a hyperfocal distance chart, compatible lenses and how to check the shutter count.
Equivalent focal length & field of view
| Lens focal length | Full-frame equivalent | Diagonal FOV | Horizontal FOV |
|---|---|---|---|
| 14 mm | 11 mm | 125.9° | 114.8° |
| 16 mm | 13 mm | 119.4° | 107.7° |
| 18 mm | 14 mm | 113.4° | 101.2° |
| 20 mm | 16 mm | 107.7° | 95.2° |
| 24 mm | 19 mm | 97.5° | 84.8° |
| 28 mm | 22 mm | 88.7° | 76.1° |
| 35 mm | 28 mm | 76.1° | 64.1° |
| 50 mm | 40 mm | 57.4° | 47.3° |
| 85 mm | 67 mm | 35.7° | 28.9° |
| 135 mm | 107 mm | 22.9° | 18.4° |
| 200 mm | 158 mm | 15.6° | 12.5° |
| 300 mm | 237 mm | 10.4° | 8.4° |
| 400 mm | 316 mm | 7.8° | 6.3° |
| 600 mm | 474 mm | 5.2° | 4.2° |
Multiply by the 0.79× crop factor for the full-frame equivalent field of view.
Milky Way exposure: NPF and 500 rule
| Focal length | NPF @ f/1.8 | NPF @ f/2.8 | Strict NPF @ f/2.8 | 500 rule |
|---|---|---|---|---|
| 14 mm | 15.8 s | 18.3 s | 9.9 s | 45.2 s |
| 16 mm | 13.9 s | 16.0 s | 8.7 s | 39.6 s |
| 18 mm | 12.3 s | 14.3 s | 7.7 s | 35.2 s |
| 20 mm | 11.1 s | 12.8 s | 7.0 s | 31.6 s |
| 24 mm | 9.2 s | 10.7 s | 5.8 s | 26.4 s |
| 28 mm | 7.9 s | 9.2 s | 5.0 s | 22.6 s |
| 35 mm | 6.3 s | 7.3 s | 4.0 s | 18.1 s |
| 50 mm | 4.4 s | 5.1 s | 2.9 s | 12.7 s |
NPF = (35 × f-number + 30 × pixel pitch) ÷ focal length, with a pixel pitch of 5.29 µm (from 51.4 MP). The strict version (Michaud's detailed NPF for the galactic core) gives pin-point stars at 100% view; the 500 rule is a loose rule of thumb that shows trailing on modern sensors.
Hyperfocal distance chart
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 16 mm | 2.4 m | 1.2 m | 0.9 m | 0.6 m | 0.4 m |
| 18 mm | 3.1 m | 1.5 m | 1.1 m | 0.8 m | 0.6 m |
| 20 mm | 3.8 m | 1.9 m | 1.3 m | 1.0 m | 0.7 m |
| 24 mm | 5.4 m | 2.7 m | 1.9 m | 1.4 m | 1.0 m |
| 28 mm | 7.4 m | 3.7 m | 2.6 m | 1.9 m | 1.3 m |
| 35 mm | 12 m | 5.8 m | 4.1 m | 3.0 m | 2.0 m |
| 50 mm | 24 m | 12 m | 8.3 m | 6.0 m | 4.2 m |
Focus at the hyperfocal distance and everything from half that distance to infinity is acceptably sharp (circle of confusion 0.038 mm). Use the hyperfocal calculator for other settings.
Maximum print size
| Print resolution | Inches | Centimeters |
|---|---|---|
| 150 ppi | 55.2 × 41.4 in | 140 × 105 cm |
| 200 ppi | 41.4 × 31.0 in | 105 × 79 cm |
| 240 ppi | 34.5 × 25.9 in | 88 × 66 cm |
| 300 ppi | 27.6 × 20.7 in | 70 × 53 cm |
300 ppi suits close viewing; 150–200 ppi is plenty for large prints viewed from a distance.
Compatible lenses (7 in our database)
| Lens | Focal length | Max aperture | Mount |
|---|---|---|---|
| Fujifilm GF23mmF4 R LM WR | 23 mm | f/23 | Fujifilm G |
| Fujifilm GF35-70mmF4.5-5.6 WR | 35–70 mm | f/35 | Fujifilm G |
| Fujifilm GF45mmF2.8 R WR | 45 mm | f/45 | Fujifilm G |
| Fujifilm GF50mmF3.5 R LM WR | 50 mm | f/50 | Fujifilm G |
| Fujifilm GF55mmF1.7 R WR | 55 mm | f/55 | Fujifilm G |
| Fujifilm GF80mmF1.7 R WR | 80 mm | f/80 | Fujifilm G |
| Fujifilm GF110mmF2 R LM WR | 110 mm | f/110 | Fujifilm G |
Native and adapter-free compatible lenses from the Lensfun database. Third-party and adapted lenses may also work.
How to check the Fujifilm GFX 50S shutter count
Fujifilm records an image counter (ImageCount) in MakerNotes on many X-series bodies; it counts frames rather than mechanical actuations. Run `exiftool -ImageCount image.raf`.
ExifTool tag: ImageCount. Always test an original, unedited file straight from the card.
Where to buy
Compare new and used prices at these retailers:
B&H PhotoAmazonKEH (used)MPB (used)Other Fujifilm G cameras
- Fujifilm GFX 50R2018
- Fujifilm GFX50S II2021
- Fujifilm GFX 1002019
- Fujifilm GFX100S2021
- Fujifilm GFX100S II2024
- Fujifilm GFX100 II2023