Specifications#
- Brand
- Casio
- Model
- Exilim EX-Z850
- Also known as
- EX-Z850
- Camera type
- Compact
- Sensor size
- 7.1 × 5.3 mm (1/1.7" sensor)
- Crop factor
- 4.87×
Specifications merged from Wikidata and openMVG. Spot an error? Tell us.
Sensor size compared#
Focal length equivalents & field of view#
Multiply any focal length by 4.87 to get the full-frame field of view. For fixed-lens cameras use the real focal length printed on the lens (e.g. “6.1–18.3 mm”), not the 35 mm equivalent.
| Lens on this camera | Full-frame equivalent | Horizontal | Vertical | Diagonal |
|---|---|---|---|---|
| 4 mm | 19 mm | 83.3° | 67.3° | 96.0° |
| 4.5 mm | 22 mm | 76.6° | 61.3° | 89.3° |
| 5 mm | 24 mm | 70.8° | 56.1° | 83.2° |
| 6 mm | 29 mm | 61.3° | 47.9° | 73.0° |
| 8 mm | 39 mm | 47.9° | 36.8° | 58.1° |
| 10 mm | 49 mm | 39.1° | 29.8° | 47.9° |
| 12 mm | 58 mm | 33.0° | 25.0° | 40.6° |
| 15 mm | 73 mm | 26.7° | 20.1° | 33.0° |
| 20 mm | 97 mm | 20.2° | 15.2° | 25.0° |
| 25 mm | 122 mm | 16.2° | 12.2° | 20.2° |
| 30 mm | 146 mm | 13.5° | 10.2° | 16.8° |
| 40 mm | 195 mm | 10.2° | 7.6° | 12.7° |
| 50 mm | 243 mm | 8.1° | 6.1° | 10.2° |
| 70 mm | 341 mm | 5.8° | 4.4° | 7.3° |
| 100 mm | 487 mm | 4.1° | 3.1° | 5.1° |
| 150 mm | 730 mm | 2.7° | 2.0° | 3.4° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 6.2 µm (the 0.030 mm full-frame standard scaled by the crop factor).
| Focal | Aperture | 50.0 cm | 1.00 m | 2.00 m | 3.00 m | 5.00 m | 10.0 m | Hyperfocal |
|---|---|---|---|---|---|---|---|---|
| 4 mm | f/2 | 44.7 cm | 3.73 m | ∞ | ∞ | ∞ | ∞ | 1.30 m |
| 4 mm | f/2.8 | 74.9 cm | ∞ | ∞ | ∞ | ∞ | ∞ | 93.1 cm |
| 4 mm | f/4 | 1.84 m | ∞ | ∞ | ∞ | ∞ | ∞ | 65.3 cm |
| 4 mm | f/8 | ∞ | ∞ | ∞ | ∞ | ∞ | ∞ | 32.9 cm |
| 9 mm | f/2 | 7.5 cm | 30.9 cm | 1.33 m | 3.44 m | 17.9 m | ∞ | 6.58 m |
| 9 mm | f/2.8 | 10.6 cm | 44.2 cm | 2.07 m | 6.43 m | ∞ | ∞ | 4.70 m |
| 9 mm | f/4 | 15.3 cm | 66.3 cm | 3.83 m | 31.8 m | ∞ | ∞ | 3.30 m |
| 9 mm | f/8 | 32.8 cm | 1.90 m | ∞ | ∞ | ∞ | ∞ | 1.65 m |
| 15 mm | f/2 | 2.7 cm | 10.8 cm | 44.0 cm | 1.01 m | 2.95 m | 15.6 m | 18.3 m |
| 15 mm | f/2.8 | 3.7 cm | 15.2 cm | 62.3 cm | 1.45 m | 4.48 m | 37.0 m | 13.1 m |
| 15 mm | f/4 | 5.3 cm | 21.8 cm | 91.3 cm | 2.20 m | 7.78 m | ∞ | 9.14 m |
| 15 mm | f/8 | 10.7 cm | 45.3 cm | 2.15 m | 6.85 m | ∞ | ∞ | 4.58 m |
| 25 mm | f/2 | 0.9 cm | 3.8 cm | 15.6 cm | 35.3 cm | 99.0 cm | 4.09 m | 50.7 m |
| 25 mm | f/2.8 | 1.3 cm | 5.4 cm | 21.9 cm | 49.6 cm | 1.40 m | 5.96 m | 36.3 m |
| 25 mm | f/4 | 1.9 cm | 7.7 cm | 31.3 cm | 71.4 cm | 2.04 m | 9.31 m | 25.4 m |
| 25 mm | f/8 | 3.8 cm | 15.5 cm | 63.9 cm | 1.49 m | 4.64 m | 41.3 m | 12.7 m |
Equivalent aperture#
Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.
Night-sky exposure limits#
Longest exposure before stars trail. The NPF rule accounts for pixel pitch and is stricter than the classic 500 rule — use it for pin-sharp stars on high-resolution sensors. (NPF needs a known resolution and is omitted here.)
| Focal length | 500 rule |
|---|---|
| 4 mm (19 mm eq.) | 25.7 s |
| 5 mm (24 mm eq.) | 20.5 s |
| 6 mm (29 mm eq.) | 17.1 s |
| 7 mm (34 mm eq.) | 14.7 s |
| 10 mm (49 mm eq.) | 10.3 s |
Handheld shutter speed guide#
The reciprocal rule uses the equivalent focal length. High-resolution sensors may need one stop faster than this for pixel-sharp results.
| Focal length | No stabilisation (1/equiv. focal) | With 3-stop IS | With 5-stop IBIS |
|---|---|---|---|
| 5 mm | 1/25 s | 0.3 s | 1.3 s |
| 10 mm | 1/50 s | 1/6 s | 0.6 s |
| 21 mm | 1/100 s | 1/13 s | 0.3 s |
| 41 mm | 1/200 s | 1/25 s | 1/6 s |
Lens#
The Casio Exilim EX-Z850 has a built-in, non-interchangeable lens. Use the real focal length of that lens with the tables above; its full-frame equivalent is that number × 4.87.
Similar cameras#
Other 1/1.7" cameras from around the same time.
Frequently asked questions#
What is the crop factor of the Casio Exilim EX-Z850?
The Casio Exilim EX-Z850 has a crop factor of 4.87× relative to 35 mm full frame (diagonal 8.9 mm vs 43.3 mm).
What size is the Casio Exilim EX-Z850 sensor?
7.1 × 5.3 mm (1/1.7"), an area of 38 mm² — 4% of full frame.
Is the Casio Exilim EX-Z850 full frame?
No — its sensor is 1/1.7", which is 22.8× smaller in area than full frame.
How long can I expose the night sky with the Casio Exilim EX-Z850?
With a 5 mm lens (24 mm equivalent) the 500 rule gives 21 s.
Sources & licences#
- Wikidata Q140486090 — CC0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources