Canon SX420 vs XT

The Canon PowerShot SX420 IS and the Canon EOS Rebel XT (labelled Canon 350D in some countries) are two digital cameras that were officially introduced, respectively, in January 2016 and February 2005. The SX420 is a fixed lens compact, while the XT is a DSLR. The cameras are based on a 1/2.3-inch (SX420) and an APS-C (XT) sensor. The SX420 has a resolution of 19.9 megapixels, whereas the XT provides 8 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications

Canon SX420		Canon XT
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		8 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		1.8" LCD – 115k 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		400 shots per battery charge
104 x 69 x 85 mm, 325 g		127 x 94 x 64 mm, 540 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot SX420 IS and the Canon EOS Rebel XT? 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.

Body comparison

An illustration of the physical size and weight of the Canon SX420 and the Canon XT is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The SX420 can be obtained in two different colors (black, red), while the XT is also available in two color-versions, but different ones (black, silver).

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon XT is considerably larger (66 percent) than the Canon SX420. In this context, it is worth noting that neither the SX420 nor the XT 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 XT 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 XT and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the SX420 gets 195 shots out of its NB-11LH battery, while the XT can take 400 images on a single charge of its NB-2LH power pack.

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, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price (USD)	Street Price
1.		Canon SX420	104 mm	69 mm	85 mm	325 g	195	n	Jan 2016	299	ebay.com
2.		Canon XT	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	899	ebay.com
3.		Canon SX430	104 mm	69 mm	85 mm	323 g	195	n	Jan 2017	299	amazon.com
4.		Canon 77D	131 mm	100 mm	76 mm	540 g	600	n	Feb 2017	899	ebay.com
5.		Canon SX730	110 mm	64 mm	40 mm	300 g	250	n	Apr 2017	399	ebay.com
6.		Canon G7 X Mark II	106 mm	61 mm	42 mm	319 g	265	n	Feb 2016	699	ebay.com
7.		Canon SX620	97 mm	57 mm	28 mm	182 g	295	n	May 2016	279	ebay.com
8.		Canon SX720	110 mm	64 mm	36 mm	270 g	250	n	Feb 2016	379	ebay.com
9.		Canon G5 X	112 mm	76 mm	44 mm	353 g	210	n	Oct 2015	799	ebay.com
10.		Canon T6i	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	749	ebay.com
11.		Canon T6s	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	649	ebay.com
12.		Canon SX410	104 mm	69 mm	85 mm	325 g	185	n	Feb 2015	279	ebay.com
13.		Canon SX610	105 mm	61 mm	27 mm	191 g	270	n	Jan 2015	249	ebay.com
14.		Canon SX710	113 mm	66 mm	35 mm	269 g	230	n	Jan 2015	349	ebay.com
15.		Canon XTi	127 mm	84 mm	65 mm	556 g	370	n	Aug 2006	799	ebay.com
16.		Canon Rebel	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	899	ebay.com
17.		Panasonic ZS70	112 mm	67 mm	41 mm	322 g	380	n	Apr 2017	449	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

The price is, of course, an important factor in any camera decision. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The SX420 was launched at a lower price than the XT, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and 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 XT an APS-C sensor. The sensor area in the XT 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 XT offers a 3:2 aspect.

In terms of chip-set technology, the SX420 uses a more advanced image processing engine (DIGIC 4+) than the XT (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 8 MP of the Canon XT. 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 6.41μm for the XT). However, it should be noted that the SX420 is much more recent (by 10 years and 10 months) than the XT, 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 XT are 17.3 x 11.5 inches or 43.9 x 29.3 cm for good quality, 13.8 x 9.2 inches or 35.1 x 23.4 cm for very good quality, and 11.5 x 7.7 inches or 29.3 x 19.5 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 XT offers exactly the same ISO settings.

In terms of underlying technology, the SX420 is build around a CCD sensor, while the XT uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Canon SX420	1/2.3	19.9	5152	3864	720/25p	20.3	11.7	806	48
2.		Canon XT	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
3.		Canon SX430	1/2.3	19.9	5152	3864	720/25p	20.5	11.9	900	49
4.		Canon 77D	APS-C	24.0	6000	4000	1080/60p	23.6	13.3	971	78
5.		Canon SX730	1/2.3	20.2	5184	3888	1080/60p	20.5	11.9	924	50
6.		Canon G7 X Mark II	1-inch	20.0	5472	3648	1080/60p	21.8	11.9	260	62
7.		Canon SX620	1/2.3	20.2	5184	3888	1080/30p	20.4	11.8	838	49
8.		Canon SX720	1/2.3	20.2	5184	3888	1080/60p	20.3	11.8	817	48
9.		Canon G5 X	1-inch	20.0	5472	3648	1080/60p	21.4	12.3	471	62
10.		Canon T6i	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
11.		Canon T6s	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
12.		Canon SX410	1/2.3	19.9	5152	3864	720/30p	20.2	11.6	720	47
13.		Canon SX610	1/2.3	20.2	5184	3888	1080/30p	20.2	11.6	712	47
14.		Canon SX710	1/2.3	20.2	5184	3888	1080/60p	20.2	11.6	712	47
15.		Canon XTi	APS-C	10.1	3888	2592	none	22.1	11.0	664	62
16.		Canon Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
17.		Panasonic ZS70	1/2.3	20.2	5184	3888	4K/30p	19.1	10.6	106	36
Note: DXO values in italics represent estimates based on sensor size and age.

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 XT does not. The highest resolution format that the SX420 can use is 720/25p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the XT 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 XT in connection with corresponding information for a sample of similar cameras.

Core Features

		Camera Model	Viewfinder (Type or 000 dots)	Control Panel (yes/no)	LCD Specifications (inch/000 dots)	LCD Attach- ment	Touch Screen (yes/no)	Max Shutter Speed *	Max Shutter Flaps *	Built-in Flash (yes/no)	Built-in Image Stab
1.		Canon SX420	none	n	3.0 / 230	fixed	n	1/4000s	0.5/s	Y	Y
2.		Canon XT	optical	n	1.8 / 115	fixed	n	1/4000s	3.0/s	Y	n
3.		Canon SX430	none	n	3.0 / 230	fixed	n	1/4000s	0.5/s	Y	Y
4.		Canon 77D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
5.		Canon SX730	none	n	3.0 / 922	tilting	n	1/3200s	5.9/s	Y	Y
6.		Canon G7 X Mark II	none	n	3.0 / 1040	tilting	Y	1/2000s	8.0/s	Y	Y
7.		Canon SX620	none	n	3.0 / 922	fixed	n	1/2000s	2.5/s	Y	Y
8.		Canon SX720	none	n	3.0 / 922	fixed	n	1/3200s	5.9/s	Y	Y
9.		Canon G5 X	2360	n	3.0 / 1040	swivel	Y	1/2000s	5.9/s	Y	Y
10.		Canon T6i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
11.		Canon T6s	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
12.		Canon SX410	none	n	3.0 / 230	fixed	n	1/4000s	0.5/s	Y	Y
13.		Canon SX610	none	n	3.0 / 922	fixed	n	1/2000s	2.5/s	Y	Y
14.		Canon SX710	none	n	3.0 / 922	fixed	n	1/3200s	6.0/s	Y	Y
15.		Canon XTi	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
16.		Canon Rebel	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
17.		Panasonic ZS70	1166	n	3.0 / 1040	tilting	Y	1/2000s	10.0/s	Y	Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The SX420 writes its imaging data to SDXC cards, while the XT uses Compact Flash cards.

Connectivity comparison

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 XT and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections

		Camera Model	Hotshoe Port	Internal Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Canon SX420	-	mono / mono	-	-	-	2.0	Y	Y	-
2.		Canon XT	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon SX430	-	mono / mono	-	-	-	2.0	Y	Y	-
4.		Canon 77D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
5.		Canon SX730	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
6.		Canon G7 X Mark II	-	stereo / mono	-	-	micro	2.0	Y	Y	-
7.		Canon SX620	-	mono / mono	-	-	micro	2.0	Y	Y	-
8.		Canon SX720	-	stereo / mono	-	-	micro	2.0	Y	Y	-
9.		Canon G5 X	Y	stereo / mono	-	-	mini	2.0	Y	Y	-
10.		Canon T6i	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
11.		Canon T6s	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
12.		Canon SX410	-	stereo / mono	-	-	-	2.0	-	-	-
13.		Canon SX610	-	- / -	-	-	micro	2.0	Y	Y	-
14.		Canon SX710	-	stereo / mono	-	-	micro	2.0	Y	Y	-
15.		Canon XTi	Y	- / -	-	-	-	2.0	-	-	-
16.		Canon Rebel	Y	- / -	-	-	-	1.1	-	-	-
17.		Panasonic ZS70	-	stereo / mono	-	-	micro	2.0	Y	-	-

It is notable that the SX420 offers wifi support, while the XT does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both the SX420 and the XT have been discontinued, but can regularly be found used on ebay. The XT was replaced by the Canon Xti, while the SX420 was followed by the Canon SX430. Further information on the features and operation of the SX420 and XT can be found, respectively, in the Canon SX420 Manual (free pdf) or the online Canon XT Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Canon SX420 and the Canon XT? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Canon PowerShot SX420 IS:

• More detail: Offers more megapixels (19.9 vs 8MP) with a 55% 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 1.8") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (230k vs 115k dots).
• Ready to shoot: Comes with a built-in lens, while the XT requires a separate lens.
• More compact: Is smaller (104x69mm vs 127x94mm) and thus needs less room in the bag.
• Less heavy: Is lighter even though it comes with a built-in lens (unlike the XT).
• 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 10 years and 10 months of technical progress since the XT launch.

Reasons to prefer the Canon EOS Rebel XT:

• 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 (400 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 February 2005).

If the number of relative strengths (bullet points above) is taken as a guide, the SX420 emerges as the winner of the contest (14 : 11 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 XT 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 XT. 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.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price (USD)	Street Price
1.		Canon SX420	..	..	..	..	..	3/5	Jan 2016	299	ebay.com
2.		Canon XT	..	80/100	..	+ +	o	..	Feb 2005	899	ebay.com
3.		Canon SX430	..	..	..	..	3.5/5	3.5/5	Jan 2017	299	amazon.com
4.		Canon 77D	4.5/5	..	4/5	82/100	4.5/5	4/5	Feb 2017	899	ebay.com
5.		Canon SX730	..	+	..	..	4/5	4/5	Apr 2017	399	ebay.com
6.		Canon G7 X Mark II	4.5/5	+ +	..	81/100	4.5/5	4.5/5	Feb 2016	699	ebay.com
7.		Canon SX620	..	..	..	..	..	4/5	May 2016	279	ebay.com
8.		Canon SX720	..	+	..	..	4/5	4.5/5	Feb 2016	379	ebay.com
9.		Canon G5 X	5/5	+ +	..	78/100	4.5/5	4.5/5	Oct 2015	799	ebay.com
10.		Canon T6i	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	749	ebay.com
11.		Canon T6s	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	649	ebay.com
12.		Canon SX410	..	o	..	..	..	..	Feb 2015	279	ebay.com
13.		Canon SX610	..	..	..	..	4/5	4/5	Jan 2015	249	ebay.com
14.		Canon SX710	..	+	..	..	4/5	3.5/5	Jan 2015	349	ebay.com
15.		Canon XTi	..	+ +	..	+ +	o	4/5	Aug 2006	799	ebay.com
16.		Canon Rebel	..	..	..	+ +	..	..	Aug 2003	899	ebay.com
17.		Panasonic ZS70	..	+ +	..	..	4/5	4/5	Apr 2017	449	ebay.com
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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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 make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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