Canon SX420 vs XTi
The Canon PowerShot SX420 IS and the Canon EOS Rebel XTi (labelled Canon 400D in some countries) are two digital cameras that were officially introduced, respectively, in January 2016 and August 2006. The SX420 is a fixed lens compact, while the XTi is a DSLR. The cameras are based on a 1/2.3-inch (SX420) and an APS-C (XTi) sensor. The SX420 has a resolution of 19.9 megapixels, whereas the XTi provides 10.1 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon SX420||Canon XTi|
|Fixed lens compact camera||Digital single lens reflex|
|24-1008mm f/3.5-6.6||Canon EF mount lenses|
|19.9 MP, 1/2.3" Sensor||10.1 MP, APS-C Sensor|
|720/25p Video||no Video|
|ISO 100-1,600||ISO 100-1,600|
|No viewfinder, LCD framing||Optical viewfinder|
|3.0 LCD, 230k dots||2.5 LCD, 230k dots|
|Fixed screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|0.5 shutter flaps per second||3 shutter flaps per second|
|195 shots per battery charge||370 shots per battery charge|
|104 x 69 x 85 mm, 325 g||127 x 84 x 65 mm, 556 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot SX420 IS and the Canon EOS Rebel XTi? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
The physical size and weight of the Canon SX420 and the Canon XTi are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.
The SX420 can be obtained in two different colors (black, red), while the XTi is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon XTi is considerably larger (49 percent) than the Canon SX420. In this context, it is worth noting that neither the SX420 nor the XTi are weather-sealed.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the SX420 has a lens built in, whereas the XTi is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the XTi and their specifications in the Canon EF Lens Catalog.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Canon SX420||4.1 in||2.7 in||3.3 in||11.5 oz||195||n||Jan 2016||299|
|Canon XTi||5.0 in||3.3 in||2.6 in||19.6 oz||370||n||Aug 2006||799|
|Canon SX740||4.3 in||2.5 in||1.6 in||10.5 oz||265||n||Jul 2018||399|
|Canon SX730||4.3 in||2.5 in||1.6 in||10.6 oz||250||n||Apr 2017||399|
|Canon G7 X Mark II||4.2 in||2.4 in||1.7 in||11.3 oz||265||n||Feb 2016||699|
|Canon SX620||3.8 in||2.2 in||1.1 in||6.4 oz||295||n||May 2016||279|
|Canon SX720||4.3 in||2.5 in||1.4 in||9.5 oz||250||n||Feb 2016||379|
|Canon G5 X||4.4 in||3.0 in||1.7 in||12.5 oz||210||n||Oct 2015||799|
|Canon T6i||5.2 in||4.0 in||3.1 in||19.6 oz||440||n||Feb 2015||749|
|Canon T6s||5.2 in||4.0 in||3.1 in||19.9 oz||440||n||Feb 2015||649|
|Canon SX410||4.1 in||2.7 in||3.3 in||11.5 oz||185||n||Feb 2015||279|
|Canon SX610||4.1 in||2.4 in||1.1 in||6.7 oz||270||n||Jan 2015||249|
|Canon SX710||4.4 in||2.6 in||1.4 in||9.5 oz||230||n||Jan 2015||349|
|Canon XSi||5.1 in||3.9 in||2.4 in||18.5 oz||500||n||Jan 2008||799|
|Canon XT||5.0 in||3.7 in||2.5 in||19.0 oz||400||n||Feb 2005||899|
|Canon Rebel||5.6 in||3.9 in||2.8 in||22.9 oz||400||n||Aug 2003||899|
|Panasonic ZS70||4.4 in||2.6 in||1.6 in||11.4 oz||380||n||Apr 2017||449|
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
Any camera decision will naturally be influenced heavily by the price. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The SX420 was launched at a lower price than the XTi, despite having a lens built in. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon SX420 features a 1/2.3-inch sensor and the Canon XTi an APS-C sensor. The sensor area in the XTi is 1075 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 1.6. The sensor in the SX420 has a native 4:3 aspect ratio, while the one in the XTi offers a 3:2 aspect.
In terms of chip-set technology, the SX420 uses a more advanced image processing engine (DIGIC 4+) than the XTi (DIGIC II), with benefits for noise reduction, color accuracy, and processing speed.
Despite having a smaller sensor, the Canon SX420 offers a higher resolution of 19.9 megapixels, compared with 10.1 MP of the Canon XTi. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 1.19μm versus 5.71μm for the XTi). However, it should be noted that the SX420 is much more recent (by 9 years and 4 months) than the XTi, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the SX420 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Canon SX420 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the SX420 for good quality output (200 dots per inch) amounts to 25.8 x 19.3 inches or 65.4 x 49.1 cm, for very good quality (250 dpi) 20.6 x 15.5 inches or 52.3 x 39.3 cm, and for excellent quality (300 dpi) 17.2 x 12.9 inches or 43.6 x 32.7 cm. The corresponding values for the Canon XTi are 19.4 x 13 inches or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inches or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inches or 32.9 x 21.9 cm for excellent quality prints.
The Canon PowerShot SX420 IS has a native sensitivity range from ISO 100 to ISO 1600. The Canon EOS Rebel XTi offers exactly the same ISO settings.
For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
|Canon G5 X||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The SX420 indeed provides movie recording capabilities, while the XTi does not. The highest resolution format that the SX420 can use is 720/25p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the XTi has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the SX420 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon SX420 and Canon XTi in connection with corresponding information for a sample of similar cameras.
|Canon G7 X Mark II||none||n||3.0||1040||tilting||Y||1/2000s||8.0||Y||Y|
|Canon G5 X||2360||n||3.0||1040||swivel||Y||1/2000s||5.9||Y||Y|
The SX420 writes its imaging data to SDXC cards, while the XTi uses Compact Flash cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon PowerShot SX420 IS and Canon EOS Rebel XTi and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Canon G7 X Mark II||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Canon G5 X||Y||stereo||mono||-||-||mini||2.0||Y||Y||-|
It is notable that the SX420 offers wifi support, while the XTi does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
The SX420 is a recent model that features in the current product line-up of Canon. In contrast, the XTi has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the XTi was succeeded by the Canon Xsi. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.
So what is the bottom line? Is there a clear favorite between the Canon SX420 and the Canon XTi? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Canon PowerShot SX420 IS:
- More detail: Offers more megapixels (19.9 vs 10.1MP) with a 38% higher linear resolution.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better jpgs: Has a more modern image processing engine (DIGIC 4+ vs DIGIC II).
- Broader imaging potential: Can record not only still images but also 720/25p movies.
- Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
- Ready to shoot: Comes with a built-in lens, while the XTi requires a separate lens.
- More compact: Is smaller (104x69mm vs 127x84mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the XTi).
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 9 years and 4 months of technical progress since the XTi launch.
Advantages of the Canon EOS Rebel XTi:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
- Richer colors: The pixel size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Faster burst: Shoots at higher frequency (3 vs 0.5 flaps/sec) to capture the decisive moment.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (370 versus 195) out of a single battery charge.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- More heavily discounted: Has been around for much longer (launched in August 2006).
If the count of relative strengths (bullet points above) is taken as a measure, the SX420 emerges as the winner of the contest (13 : 11 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Canon SX420 and the Canon XTi place the cameras among the top in their class? Find out in the latest Best Superzoom Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the SX420 or the XTi. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|Canon SX420||..||..||..||..||3/5||Jan 2016||299|
|Canon XTi||+ +||+ +||o||4.5/5||4/5||Aug 2006||799|
|Canon SX740||+||..||4/5||..||4/5||Jul 2018||399|
|Canon SX730||+||..||4/5||..||4/5||Apr 2017||399|
|Canon G7 X Mark II||+ +||81/100||4.5/5||4/5||4.5/5||Feb 2016||699|
|Canon SX620||..||..||..||..||4/5||May 2016||279|
|Canon SX720||+||..||4/5||..||4.5/5||Feb 2016||379|
|Canon G5 X||+ +||78/100||4.5/5||4/5||4.5/5||Oct 2015||799|
|Canon T6i||..||75/100||4.5/5||4.5/5||4.5/5||Feb 2015||749|
|Canon T6s||+||77/100||4.5/5||4.5/5||4.5/5||Feb 2015||649|
|Canon SX410||o||..||..||..||..||Feb 2015||279|
|Canon SX610||..||..||4/5||..||4/5||Jan 2015||249|
|Canon SX710||+||..||4/5||..||3.5/5||Jan 2015||349|
|Canon XSi||+ +||+ +||4/5||5/5||4.5/5||Jan 2008||799|
|Canon XT||80/100||+ +||o||o||..||Feb 2005||899|
|Canon Rebel||..||+ +||..||o||..||Aug 2003||899|
|Panasonic ZS70||+ +||..||4/5||..||4/5||Apr 2017||449|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Other camera comparisons
Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon S120 vs Canon SX420
- Canon SX420 vs Canon SX50
- Canon SX420 vs Panasonic FZ82
- Canon SX420 vs Panasonic L1
- Canon T4i vs Canon XTi
- Canon T7 vs Canon XTi
- Canon XTi vs Fujifilm X-E1
- Canon XTi vs Nikon Coolpix A
- Canon XTi vs Panasonic FZ200
- Canon XTi vs Panasonic FZ80
- Canon XTi vs Ricoh GR III
- Canon XTi vs Sony NEX-C3
Specifications: Canon SX420 vs Canon XTi
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Canon SX420||Canon XTi|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-1008mm f/3.5-6.6||Canon EF mount lenses|
|Launch Date||January 2016||August 2006|
|Launch Price||USD 299||USD 799|
|Sensor Specs||Canon SX420||Canon XTi|
|Sensor Format||1/2.3" Sensor||APS-C Sensor|
|Sensor Size||6.17 x 4.55 mm||22.2 x 14.8 mm|
|Sensor Area||28.0735 mm2||328.56 mm2|
|Sensor Diagonal||7.7 mm||26.7 mm|
|Sensor Resolution||19.9 Megapixels||10.1 Megapixels|
|Image Resolution||5152 x 3864 pixels||3888 x 2592 pixels|
|Pixel Pitch||1.19 μm||5.71 μm|
|Pixel Density||70.91 MP/cm2||3.07 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||720/25p Video||no Video|
|ISO Setting||100 - 1,600 ISO||100 - 1,600 ISO|
|Image Processor||DIGIC 4+||DIGIC II|
|DXO Sensor Quality (score)||..||62|
|DXO Color Depth (bits)||..||22.1|
|DXO Dynamic Range (EV)||..||11.0|
|DXO Low Light (ISO)||..||664|
|Screen Specs||Canon SX420||Canon XTi|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||2.5inch|
|LCD Resolution||230k dots||230k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon SX420||Canon XTi|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Continuous Shooting||0.5 shutter flaps/s||3 shutter flaps/s|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||CF cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon SX420||Canon XTi|
|External Flash||no Hotshoe||Hotshoe|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||no HDMI|
|Wifi Support||Wifi built-in||no Wifi|
|Near-Field Communication||NFC built-in||no NFC|
|Body Specs||Canon SX420||Canon XTi|
|Battery Life (CIPA)||195 shots per charge||370 shots per charge|
104 x 69 x 85 mm
(4.1 x 2.7 x 3.3 in)
127 x 84 x 65 mm
(5.0 x 3.3 x 2.6 in)
|Camera Weight||325 g (11.5 oz)||556 g (19.6 oz)|
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