Specifications#
- Brand
- Canon
- Model
- EOS 400D
- Also known as
- Canon EOS 400D DIGITAL, Canon EOS DIGITAL REBEL XTi, Canon EOS Digital Rebel XTi, EOS Digital Rebel XTi
- Camera type
- DSLR
- Released
- 2006-01-01
- Lens mount
- Canon EF-S
- Sensor size
- 22.2 × 14.8 mm (APS-C (Canon))
- Crop factor
- 1.62×
- Resolution
- 10.1 MP (3,888 × 2,592 px)
- ISO range
- 100 – 1,600
- Continuous shooting
- 3 fps
- Weight
- 510 g (18.0 oz)
- Sensor
- CMOS APS-C 22.2 mm × 14.8 mm (1.6× conversion factor)
- Storage
- CompactFlash Card Type I & II
- Viewfinder
- Eye-level pentamirror SLR, 95% coverage, 0.8× magnification
- AF points / area
- 9 AF points
- Metering
- Full aperture TTL, 35-zone SPC
- Exposure modes
- Automatic shiftable Program, Shutter-priority, Aperture-priority, Auto Depth-of-field, Full auto, Programmed modes, Manual, E-TTL II autoflash program AE
- Shutter
- Focal-plane, vertical travel, mechanical
- Flash
- E-TTL II automatic built-in pop-up, 13 m ISO 100 guide number, 27 mm (equivalent in 35 format) lens focal length coverage; compatible with Canon EX Series Speedlite external hot shoe-mount flashes
- Battery
- NB-2LH Battery Pack
- Dimensions
- 126.5 × 94.2 × 65 mm (W × H × D)
- Lens
- Interchangeable
- Predecessor
- Canon EOS 350D
- Successor
- Canon EOS 450D
- Drive
- 3 frames/s for 27 JPEG frames or 10 raw frames
Specifications merged from Wikipedia, Wikidata, Lensfun and openMVG. Spot an error? Tell us.
Sensor size compared#
Focal length equivalents & field of view#
Multiply any focal length by 1.62 to get the full-frame field of view. Angles are for a rectilinear lens focused at infinity.
| Lens on this camera | Full-frame equivalent | Horizontal | Vertical | Diagonal |
|---|---|---|---|---|
| 8 mm | 13 mm | 108.4° | 85.5° | 118.1° |
| 10 mm | 16 mm | 96.0° | 73.0° | 106.3° |
| 12 mm | 19 mm | 85.5° | 63.3° | 96.1° |
| 14 mm | 23 mm | 76.8° | 55.7° | 87.2° |
| 16 mm | 26 mm | 69.5° | 49.6° | 79.6° |
| 18 mm | 29 mm | 63.3° | 44.7° | 73.1° |
| 20 mm | 32 mm | 58.1° | 40.6° | 67.4° |
| 24 mm | 39 mm | 49.6° | 34.3° | 58.1° |
| 28 mm | 45 mm | 43.2° | 29.6° | 51.0° |
| 35 mm | 57 mm | 35.2° | 23.9° | 41.7° |
| 40 mm | 65 mm | 31.0° | 21.0° | 36.9° |
| 50 mm | 81 mm | 25.0° | 16.8° | 29.9° |
| 56 mm | 91 mm | 22.4° | 15.1° | 26.8° |
| 70 mm | 114 mm | 18.0° | 12.1° | 21.6° |
| 85 mm | 138 mm | 14.9° | 10.0° | 17.8° |
| 100 mm | 162 mm | 12.7° | 8.5° | 15.2° |
| 135 mm | 219 mm | 9.4° | 6.3° | 11.3° |
| 200 mm | 324 mm | 6.4° | 4.2° | 7.6° |
| 300 mm | 486 mm | 4.2° | 2.8° | 5.1° |
| 400 mm | 649 mm | 3.2° | 2.1° | 3.8° |
| 600 mm | 973 mm | 2.1° | 1.4° | 2.5° |
| 800 mm | 1297 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 18.5 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 | 8.3 cm | 34.5 cm | 1.52 m | 4.10 m | 30.0 m | ∞ | 5.90 m |
| 14 mm | f/2.8 | 13.1 cm | 55.9 cm | 2.90 m | 12.6 m | ∞ | ∞ | 3.80 m |
| 14 mm | f/4 | 19.0 cm | 86.4 cm | 6.85 m | ∞ | ∞ | ∞ | 2.66 m |
| 14 mm | f/8 | 42.4 cm | 3.34 m | ∞ | ∞ | ∞ | ∞ | 1.34 m |
| 27 mm | f/1.8 | 2.2 cm | 8.9 cm | 36.3 cm | 83.0 cm | 2.40 m | 11.5 m | 21.9 m |
| 27 mm | f/2.8 | 3.4 cm | 13.9 cm | 57.2 cm | 1.33 m | 4.04 m | 28.5 m | 14.1 m |
| 27 mm | f/4 | 4.8 cm | 19.9 cm | 83.5 cm | 1.99 m | 6.77 m | ∞ | 9.88 m |
| 27 mm | f/8 | 9.7 cm | 41.1 cm | 1.91 m | 5.70 m | ∞ | ∞ | 4.95 m |
| 46 mm | f/1.8 | 0.7 cm | 3.0 cm | 12.3 cm | 28.0 cm | 78.4 cm | 3.21 m | 63.6 m |
| 46 mm | f/2.8 | 1.1 cm | 4.7 cm | 19.2 cm | 43.6 cm | 1.23 m | 5.18 m | 40.9 m |
| 46 mm | f/4 | 1.6 cm | 6.7 cm | 27.5 cm | 62.7 cm | 1.79 m | 7.92 m | 28.6 m |
| 46 mm | f/8 | 3.2 cm | 13.4 cm | 55.7 cm | 1.29 m | 3.94 m | 27.0 m | 14.3 m |
| 76 mm | f/1.8 | 0.2 cm | 1.1 cm | 4.4 cm | 10.1 cm | 28.4 cm | 1.15 m | 174 m |
| 76 mm | f/2.8 | 0.4 cm | 1.7 cm | 6.9 cm | 15.7 cm | 44.2 cm | 1.79 m | 112 m |
| 76 mm | f/4 | 0.5 cm | 2.4 cm | 9.9 cm | 22.5 cm | 63.3 cm | 2.58 m | 78.1 m |
| 76 mm | f/8 | 1.1 cm | 4.7 cm | 19.8 cm | 45.2 cm | 1.28 m | 5.44 m | 39.1 m |
Equivalent aperture#
Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.
Diffraction & pixel pitch#
With 5.71 µm pixels, diffraction starts to soften pixel-level detail around f/8.5. For maximum sharpness keep landscapes between f/4.7 and f/9; stopping down further trades detail for depth of field.
| Aperture | Airy disk diameter | Spread over | At 100% view |
|---|---|---|---|
| f/2.8 | 3.8 µm | 0.7 px | sharp |
| f/4 | 5.4 µm | 0.9 px | sharp |
| f/5.6 | 7.5 µm | 1.3 px | sharp |
| f/8 | 10.7 µm | 1.9 px | sharp |
| f/11 | 14.8 µm | 2.6 px | slight softening |
| f/16 | 21.5 µm | 3.8 px | visibly soft |
| f/22 | 29.5 µm | 5.2 px | visibly soft |
Maximum print sizes#
At 10.1 MP the Canon EOS 400D produces 3,888 × 2,592 pixel images. See the 10 megapixel guide or the print size calculator.
| Resolution | Typical use | Inches | Centimetres |
|---|---|---|---|
| 300 DPI | Photo-lab quality | 13.0 × 8.6 in | 33 × 22 cm |
| 240 DPI | Fine-art inkjet | 16.2 × 10.8 in | 41 × 27 cm |
| 200 DPI | Wall print | 19.4 × 13.0 in | 49 × 33 cm |
| 150 DPI | Poster, viewed from 1 m+ | 25.9 × 17.3 in | 66 × 44 cm |
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.
| Focal length | 500 rule | NPF f/1.8 | NPF f/2.8 | NPF f/4 |
|---|---|---|---|---|
| 9 mm (15 mm eq.) | 34.3 s | 26.0 s | 29.9 s | 34.6 s |
| 12 mm (19 mm eq.) | 25.7 s | 19.5 s | 22.4 s | 25.9 s |
| 15 mm (24 mm eq.) | 20.6 s | 15.6 s | 18.0 s | 20.8 s |
| 22 mm (36 mm eq.) | 14.0 s | 10.6 s | 12.2 s | 14.1 s |
| 31 mm (50 mm eq.) | 9.9 s | 7.6 s | 8.7 s | 10.0 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 |
| 123 mm | 1/200 s | 1/25 s | 1/6 s |
Lenses for the Canon EOS 400D#
Native Canon EF-S lenses in our database (29 total). Also adaptable: T-mount (T2), Canon EF, M42 screw mount, Deckel (DKL), Tamron Adaptall, M39 / LTM (Leica thread).
- Canon EF-S 18-135mm f/3.5-5.6 IS 18–135 mm
- Canon EF-S 18-135mm f/3.5-5.6 IS STM 18–135 mm
- Canon EF-S 55-250mm f/4-5.6 IS STM 55–250 mm
- Canon EF-S 60mm f/2.8 Macro USM 60 mm
- Canon EF 75-300mm F4-5.6 III 75–300 mm
- Canon EF-S 10-18mm f/4.5-5.6 IS STM 10–18 mm
- Canon EF-S 10-22mm f/3.5-4.5 USM 10–22 mm
- Sigma 10-20mm f/3.5 EX DC HSM 10–20 mm
- Tokina atx-i 11-16mm F2.8 CF 11–16 mm
- Canon EF-S 15-85mm f/3.5-5.6 IS USM 15–85 mm
- Canon EF-S 17-55mm f/2.8 IS USM 17–55 mm
- Canon EF-S 17-85mm f/4-5.6 IS USM 17–85 mm
- Canon EF-S 18-135mm f/3.5-5.6 IS USM 18–135 mm
- Canon EF-S 18-200mm f/3.5-5.6 IS 18–200 mm
- Canon EF-S 18-55mm f/3.5-5.6 18–55 mm
- Canon EF-S 18-55mm f/3.5-5.6 II 18–55 mm
- Canon EF-S 18-55mm f/3.5-5.6 III 18–55 mm
- Canon EF-S 18-55mm f/3.5-5.6 IS 18–55 mm
- Canon EF-S 18-55mm f/3.5-5.6 IS II 18–55 mm
- Canon EF-S 18-55mm f/3.5-5.6 IS STM 18–55 mm
- Canon EF-S 18-55mm f/4-5.6 IS STM 18–55 mm
- Sigma 18-200mm f/3.5-6.3 DC Macro OS HSM 18–200 mm
- Canon EF-S 24mm f/2.8 STM 24 mm
- Samyang 35mm f/1.4 AS UMC 35 mm
- Canon EF-S 55-250mm f/4-5.6 IS 55–250 mm
- Canon EF-S 55-250mm f/4-5.6 IS II 55–250 mm
- Sigma 60-600mm F4.5-6.3 DG OS HSM | Sports 018 60–600 mm
- Sigma 60-600mm F4.5-6.3 DG OS HSM | Sports 018 + 1.4× ext. 60–600 mm
- Sigma 90mm f/2.8 Macro AF 90 mm
Frequently asked questions#
What is the crop factor of the Canon EOS 400D?
The Canon EOS 400D has a crop factor of 1.62× relative to 35 mm full frame (diagonal 26.7 mm vs 43.3 mm).
What size is the Canon EOS 400D sensor?
22.2 × 14.8 mm (APS-C (Canon)), an area of 329 mm² — 38% of full frame.
Is the Canon EOS 400D full frame?
No — its sensor is APS-C (Canon), which is 2.6× smaller in area than full frame.
How many megapixels does the Canon EOS 400D have?
10.1 megapixels (3,888 × 2,592 pixels), enough for a 13 × 9 inch print at 300 DPI.
What lens mount does the Canon EOS 400D use?
The Canon EOS 400D uses the Canon EF-S (flange distance 44.00 mm).
How long can I expose the night sky with the Canon EOS 400D?
With a 12 mm lens (19 mm equivalent) the 500 rule gives 26 s and the stricter NPF rule at f/2.8 gives 22 s.
Sources & licences#
- Wikipedia: Canon EOS 400D — CC BY-SA 4.0
- Wikidata Q64100 — CC0
- Lensfun camera database — CC BY-SA 3.0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources