Specifications#
- Brand
- Casio
- Model
- Exilim EX-ZR20
- Also known as
- EX-ZR20
- Camera type
- Compact
- Sensor size
- 6.2 × 4.6 mm (1/2.3" sensor)
- Crop factor
- 5.62×
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 5.62 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 | 22 mm | 75.2° | 60.0° | 87.8° |
| 4.5 mm | 25 mm | 68.8° | 54.3° | 81.1° |
| 5 mm | 28 mm | 63.3° | 49.6° | 75.2° |
| 6 mm | 34 mm | 54.3° | 42.1° | 65.4° |
| 8 mm | 45 mm | 42.1° | 32.2° | 51.4° |
| 10 mm | 56 mm | 34.2° | 26.0° | 42.1° |
| 12 mm | 67 mm | 28.8° | 21.8° | 35.6° |
| 15 mm | 84 mm | 23.2° | 17.5° | 28.8° |
| 20 mm | 112 mm | 17.5° | 13.2° | 21.8° |
| 25 mm | 140 mm | 14.0° | 10.6° | 17.5° |
| 30 mm | 169 mm | 11.7° | 8.8° | 14.6° |
| 40 mm | 225 mm | 8.8° | 6.6° | 11.0° |
| 50 mm | 281 mm | 7.0° | 5.3° | 8.8° |
| 70 mm | 393 mm | 5.0° | 3.8° | 6.3° |
| 100 mm | 562 mm | 3.5° | 2.6° | 4.4° |
| 150 mm | 843 mm | 2.4° | 1.8° | 2.9° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 5.3 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 | 37.2 cm | 2.38 m | ∞ | ∞ | ∞ | ∞ | 1.50 m |
| 4 mm | f/2.8 | 59.0 cm | 13.9 m | ∞ | ∞ | ∞ | ∞ | 1.07 m |
| 4 mm | f/4 | 1.18 m | ∞ | ∞ | ∞ | ∞ | ∞ | 75.3 cm |
| 4 mm | f/8 | ∞ | ∞ | ∞ | ∞ | ∞ | ∞ | 37.9 cm |
| 8 mm | f/2 | 8.3 cm | 34.0 cm | 1.49 m | 3.99 m | 27.2 m | ∞ | 6.00 m |
| 8 mm | f/2.8 | 11.6 cm | 49.0 cm | 2.38 m | 8.20 m | ∞ | ∞ | 4.29 m |
| 8 mm | f/4 | 16.9 cm | 74.4 cm | 4.76 m | 1.9 km | ∞ | ∞ | 3.00 m |
| 8 mm | f/8 | 36.8 cm | 2.36 m | ∞ | ∞ | ∞ | ∞ | 1.51 m |
| 14 mm | f/2 | 2.6 cm | 10.8 cm | 43.8 cm | 1.00 m | 2.93 m | 15.5 m | 18.4 m |
| 14 mm | f/2.8 | 3.7 cm | 15.1 cm | 62.0 cm | 1.44 m | 4.45 m | 36.3 m | 13.1 m |
| 14 mm | f/4 | 5.3 cm | 21.7 cm | 90.8 cm | 2.18 m | 7.71 m | ∞ | 9.19 m |
| 14 mm | f/8 | 10.7 cm | 45.1 cm | 2.13 m | 6.77 m | ∞ | ∞ | 4.60 m |
| 22 mm | f/2 | 1.1 cm | 4.3 cm | 17.5 cm | 39.6 cm | 1.11 m | 4.63 m | 45.3 m |
| 22 mm | f/2.8 | 1.5 cm | 6.0 cm | 24.5 cm | 55.7 cm | 1.57 m | 6.81 m | 32.4 m |
| 22 mm | f/4 | 2.1 cm | 8.6 cm | 35.2 cm | 80.2 cm | 2.31 m | 10.9 m | 22.7 m |
| 22 mm | f/8 | 4.2 cm | 17.4 cm | 72.0 cm | 1.69 m | 5.44 m | 78.4 m | 11.4 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 (22 mm eq.) | 22.2 s |
| 5 mm (28 mm eq.) | 17.8 s |
| 6 mm (34 mm eq.) | 14.8 s |
| 7 mm (39 mm eq.) | 12.7 s |
| 9 mm (51 mm eq.) | 9.9 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 |
|---|---|---|---|
| 4 mm | 1/25 s | 0.3 s | 1.3 s |
| 9 mm | 1/50 s | 1/6 s | 0.6 s |
| 18 mm | 1/100 s | 1/13 s | 0.3 s |
| 36 mm | 1/200 s | 1/25 s | 1/6 s |
Lens#
The Casio Exilim EX-ZR20 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 × 5.62.
Similar cameras#
Other 1/2.3" cameras from around the same time.
Frequently asked questions#
What is the crop factor of the Casio Exilim EX-ZR20?
The Casio Exilim EX-ZR20 has a crop factor of 5.62× relative to 35 mm full frame (diagonal 7.7 mm vs 43.3 mm).
What size is the Casio Exilim EX-ZR20 sensor?
6.2 × 4.6 mm (1/2.3"), an area of 28 mm² — 3% of full frame.
Is the Casio Exilim EX-ZR20 full frame?
No — its sensor is 1/2.3", which is 30.4× smaller in area than full frame.
How long can I expose the night sky with the Casio Exilim EX-ZR20?
With a 5 mm lens (28 mm equivalent) the 500 rule gives 18 s.
Sources & licences#
- Wikidata Q140487980 — CC0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources