Specifications#
- Brand
- Canon
- Model
- EOS 20Da
- Camera type
- DSLR
- Sensor size
- 22.5 × 15.0 mm (APS-C (Canon))
- Crop factor
- 1.60×
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 1.60 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 |
|---|---|---|---|---|
| 8 mm | 13 mm | 109.2° | 86.3° | 118.8° |
| 10 mm | 16 mm | 96.7° | 73.7° | 107.0° |
| 12 mm | 19 mm | 86.3° | 64.0° | 96.8° |
| 14 mm | 22 mm | 77.6° | 56.4° | 88.0° |
| 16 mm | 26 mm | 70.2° | 50.2° | 80.4° |
| 18 mm | 29 mm | 64.0° | 45.2° | 73.8° |
| 20 mm | 32 mm | 58.7° | 41.1° | 68.1° |
| 24 mm | 38 mm | 50.2° | 34.7° | 58.8° |
| 28 mm | 45 mm | 43.8° | 30.0° | 51.6° |
| 35 mm | 56 mm | 35.6° | 24.2° | 42.2° |
| 40 mm | 64 mm | 31.4° | 21.2° | 37.4° |
| 50 mm | 80 mm | 25.4° | 17.1° | 30.3° |
| 56 mm | 90 mm | 22.7° | 15.3° | 27.1° |
| 70 mm | 112 mm | 18.3° | 12.2° | 21.9° |
| 85 mm | 136 mm | 15.1° | 10.1° | 18.1° |
| 100 mm | 160 mm | 12.8° | 8.6° | 15.4° |
| 135 mm | 216 mm | 9.5° | 6.4° | 11.4° |
| 200 mm | 320 mm | 6.4° | 4.3° | 7.7° |
| 300 mm | 480 mm | 4.3° | 2.9° | 5.2° |
| 400 mm | 640 mm | 3.2° | 2.1° | 3.9° |
| 600 mm | 960 mm | 2.1° | 1.4° | 2.6° |
| 800 mm | 1280 mm | 1.6° | 1.1° | 1.9° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 18.8 µm (the 0.030 mm full-frame standard scaled by the crop factor). Detailed tables: 24 mm f/1.8, 24 mm f/2.8, 35 mm f/1.8, 35 mm f/2.8, 50 mm f/1.8, 50 mm f/2.8.
| Focal | Aperture | 50.0 cm | 1.00 m | 2.00 m | 3.00 m | 5.00 m | 10.0 m | Hyperfocal |
|---|---|---|---|---|---|---|---|---|
| 14 mm | f/1.8 | 8.4 cm | 35.0 cm | 1.55 m | 4.19 m | 32.7 m | ∞ | 5.82 m |
| 14 mm | f/2.8 | 13.2 cm | 56.8 cm | 2.97 m | 13.3 m | ∞ | ∞ | 3.75 m |
| 14 mm | f/4 | 19.3 cm | 88.0 cm | 7.20 m | ∞ | ∞ | ∞ | 2.63 m |
| 14 mm | f/8 | 43.2 cm | 3.50 m | ∞ | ∞ | ∞ | ∞ | 1.32 m |
| 27 mm | f/1.8 | 2.2 cm | 9.0 cm | 36.8 cm | 84.2 cm | 2.43 m | 11.7 m | 21.6 m |
| 27 mm | f/2.8 | 3.4 cm | 14.1 cm | 58.0 cm | 1.35 m | 4.11 m | 29.7 m | 13.9 m |
| 27 mm | f/4 | 4.9 cm | 20.2 cm | 84.7 cm | 2.02 m | 6.93 m | ∞ | 9.75 m |
| 27 mm | f/8 | 9.8 cm | 41.7 cm | 1.94 m | 5.87 m | ∞ | ∞ | 4.89 m |
| 46 mm | f/1.8 | 0.7 cm | 3.0 cm | 12.5 cm | 28.3 cm | 79.5 cm | 3.26 m | 62.7 m |
| 46 mm | f/2.8 | 1.1 cm | 4.7 cm | 19.4 cm | 44.2 cm | 1.25 m | 5.26 m | 40.4 m |
| 46 mm | f/4 | 1.6 cm | 6.8 cm | 27.8 cm | 63.5 cm | 1.81 m | 8.06 m | 28.3 m |
| 46 mm | f/8 | 3.2 cm | 13.6 cm | 56.5 cm | 1.31 m | 4.01 m | 28.1 m | 14.2 m |
| 76 mm | f/1.8 | 0.2 cm | 1.1 cm | 4.5 cm | 10.3 cm | 28.8 cm | 1.16 m | 171 m |
| 76 mm | f/2.8 | 0.4 cm | 1.7 cm | 7.0 cm | 16.0 cm | 44.8 cm | 1.82 m | 110 m |
| 76 mm | f/4 | 0.6 cm | 2.4 cm | 10.0 cm | 22.8 cm | 64.2 cm | 2.62 m | 77.1 m |
| 76 mm | f/8 | 1.1 cm | 4.8 cm | 20.0 cm | 45.8 cm | 1.30 m | 5.52 m | 38.6 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 |
|---|---|
| 9 mm (14 mm eq.) | 34.7 s |
| 12 mm (19 mm eq.) | 26.0 s |
| 15 mm (24 mm eq.) | 20.8 s |
| 22 mm (35 mm eq.) | 14.2 s |
| 31 mm (50 mm eq.) | 10.1 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 |
|---|---|---|---|
| 15 mm | 1/25 s | 0.3 s | 1.3 s |
| 31 mm | 1/50 s | 1/6 s | 0.6 s |
| 62 mm | 1/100 s | 1/13 s | 0.3 s |
| 125 mm | 1/200 s | 1/25 s | 1/6 s |
Lens#
The Canon EOS 20Da 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 × 1.60.
Frequently asked questions#
What is the crop factor of the Canon EOS 20Da?
The Canon EOS 20Da has a crop factor of 1.60× relative to 35 mm full frame (diagonal 27.0 mm vs 43.3 mm).
What size is the Canon EOS 20Da sensor?
22.5 × 15.0 mm (APS-C (Canon)), an area of 338 mm² — 39% of full frame.
Is the Canon EOS 20Da full frame?
No — its sensor is APS-C (Canon), which is 2.6× smaller in area than full frame.
How long can I expose the night sky with the Canon EOS 20Da?
With a 12 mm lens (19 mm equivalent) the 500 rule gives 26 s.
Sources & licences#
- Wikidata Q66512 — CC0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources