Canon T3i vs Panasonic G7

The Canon EOS Rebel T3i (called Canon 600D in some regions) and the Panasonic Lumix DMC-G7 are two digital cameras that were officially introduced, respectively, in February 2011 and May 2015. The T3i is a DSLR, while the G7 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (T3i) and a Four Thirds (G7) sensor. The Canon has a resolution of 17.9 megapixels, whereas the Panasonic provides 15.8 MP.

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

Headline Specifications

Canon T3i		Panasonic G7
Digital single lens reflex		Mirrorless system camera
Canon EF mount lenses		Micro Four Thirds lenses
17.9 MP – APS-C sensor		15.8 MP – Four Thirds sensor
1080/30p Video		4K/30p Video
ISO 100-6,400 (100 - 12,800)		ISO 160-25,600
Optical viewfinder		Electronic viewfinder (2360k dots)
3.0" LCD – 1040k dots		3.0" LCD – 1040k dots
Swivel screen (not touch-sensitive)		Swivel touchscreen
3.7 shutter flaps per second		7 shutter flaps per second
440 shots per battery charge		350 shots per battery charge
133 x 100 x 80 mm, 570 g		125 x 86 x 77 mm, 410 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Rebel T3i and the Panasonic Lumix DMC-G7? 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 T3i and the Panasonic G7 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.

The G7 can be obtained in two different colors (black, silver), while the T3i 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 Panasonic G7 is notably smaller (19 percent) than the Canon T3i. Moreover, the G7 is markedly lighter (28 percent) than the T3i. In this context, it is worth noting that neither the T3i nor the G7 are weather-sealed.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (T3i) and the Micro Four Thirds Lens Catalog (G7). Mirrorless cameras, such as the G7, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the T3i gets 440 shots out of its Canon LP-E8 battery, while the G7 can take 350 images on a single charge of its Panasonic DMW-BLC12 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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	Street Price
1.		Canon T3i	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	EUR 549	ebay.com
2.		Panasonic G7	125 mm	86 mm	77 mm	410 g	350	n	May 2015	EUR 699	ebay.com
3.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	EUR 599	ebay.com
4.		Canon SL1	117 mm	91 mm	69 mm	407 g	380	n	Mar 2013	EUR 499	ebay.com
5.		Canon T1i	129 mm	98 mm	62 mm	520 g	400	n	Mar 2009	EUR 699	ebay.com
6.		Canon T2i	129 mm	98 mm	62 mm	530 g	440	n	Feb 2010	EUR 649	ebay.com
7.		Canon T3	130 mm	100 mm	78 mm	495 g	700	n	Feb 2011	EUR 399	ebay.com
8.		Canon T4i	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	EUR 799	ebay.com
9.		Canon T5	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	EUR 399	ebay.com
10.		Canon T5i	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	EUR 599	ebay.com
11.		Canon T6	129 mm	101 mm	78 mm	485 g	500	n	Mar 2016	EUR 449	ebay.com
12.		Canon T6s	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	EUR 749	ebay.com
13.		Fujifilm X-E2S	129 mm	75 mm	37 mm	350 g	350	n	Jan 2016	EUR 699	ebay.com
14.		Panasonic G3	115 mm	84 mm	47 mm	336 g	270	n	May 2011	EUR 579	ebay.com
15.		Panasonic G5	120 mm	83 mm	71 mm	396 g	320	n	Jul 2012	EUR 649	ebay.com
16.		Panasonic G6	122 mm	85 mm	71 mm	390 g	340	n	Apr 2013	EUR 549	ebay.com
17.		Panasonic GM5	99 mm	60 mm	36 mm	211 g	220	n	Sep 2014	EUR 799	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The T3i was somewhat cheaper (by 8 percent) than the G7 at launch, but both cameras fall into the same price category. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Canon T3i features an APS-C sensor and the Panasonic G7 a Four Thirds sensor. The sensor area in the G7 is 32 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.0. The sensor in the T3i has a native 3:2 aspect ratio, while the one in the G7 offers a 4:3 aspect.

With 17.9MP, the T3i offers a higher resolution than the G7 (15.8MP), but the T3i nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 3.77μm for the G7) due to its larger sensor. However, the G7 is a much more recent model (by 4 years and 3 months) than the T3i, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Canon T3i implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the T3i for good quality output (200 dots per inch) amounts to 25.9 x 17.3 inches or 65.8 x 43.9 cm, for very good quality (250 dpi) 20.7 x 13.8 inches or 52.7 x 35.1 cm, and for excellent quality (300 dpi) 17.3 x 11.5 inches or 43.9 x 29.3 cm. The corresponding values for the Panasonic G7 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.

The Canon EOS Rebel T3i has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-12800. The corresponding ISO settings for the Panasonic Lumix DMC-G7 are ISO 160 to ISO 25600 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. 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 determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-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 T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
2.		Panasonic G7	Four Thirds	15.8	4592	3448	4K/30p	22.8	12.4	904	71
3.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
4.		Canon SL1	APS-C	17.9	5184	3456	1080/30p	21.8	11.3	843	63
5.		Canon T1i	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
6.		Canon T2i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	784	66
7.		Canon T3	APS-C	12.2	4272	2848	720/30p	21.9	11.0	755	62
8.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
9.		Canon T5	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
10.		Canon T5i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
11.		Canon T6	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	781	66
12.		Canon T6s	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
13.		Fujifilm X-E2S	APS-C	16.0	4896	3264	1080/60p	23.7	13.0	1608	80
14.		Panasonic G3	Four Thirds	15.8	4592	3448	1080/60i	21.0	10.6	667	56
15.		Panasonic G5	Four Thirds	15.9	4608	3456	1080/60p	21.4	11.6	618	61
16.		Panasonic G6	Four Thirds	15.9	4608	3456	1080/60p	21.3	11.5	639	61
17.		Panasonic GM5	Four Thirds	15.8	4592	3448	1080/60p	22.1	11.7	721	66
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. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the G7 provides a better video resolution than the T3i. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the G7 has an electronic viewfinder (2360k dots), while the T3i has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the G7 offers a wider field of view (100%) than the one in the T3i (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the G7 has a higher magnification (0.70x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon T3i, the Panasonic G7, and comparable 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 T3i	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
2.		Panasonic G7	2360	n	3.0 / 1040	swivel	Y	1/4000s	7.0/s	Y	n
3.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
4.		Canon SL1	optical	n	3.0 / 1040	fixed	Y	1/4000s	4.9/s	Y	n
5.		Canon T1i	optical	n	3.0 / 920	fixed	n	1/4000s	3.4/s	Y	n
6.		Canon T2i	optical	n	3.0 / 1040	fixed	n	1/4000s	3.7/s	Y	n
7.		Canon T3	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
8.		Canon T4i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
9.		Canon T5	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
10.		Canon T5i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
11.		Canon T6	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
12.		Canon T6s	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
13.		Fujifilm X-E2S	2360	n	3.0 / 1040	fixed	n	1/4000s	7.0/s	Y	n
14.		Panasonic G3	1440	n	3.0 / 460	swivel	Y	1/4000s	4.0/s	Y	n
15.		Panasonic G5	1440	n	3.0 / 920	swivel	Y	1/4000s	6.0/s	Y	n
16.		Panasonic G6	1440	n	3.0 / 1036	swivel	Y	1/4000s	7.0/s	Y	n
17.		Panasonic GM5	1166	n	3.0 / 921	fixed	Y	1/500s	5.8/s	n	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G7 has a touchscreen, while the T3i has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the G7 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Panasonic G7 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the T3i and the G7 write their files to SDXC cards. The G7 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the T3i cannot take advantage of Ultra High Speed SD 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 EOS Rebel T3i and Panasonic Lumix DMC-G7 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 T3i	Y	mono / mono	Y	-	mini	2.0	-	-	-
2.		Panasonic G7	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
3.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
4.		Canon SL1	Y	mono / mono	Y	-	mini	2.0	-	-	-
5.		Canon T1i	Y	mono / mono	-	-	mini	2.0	-	-	-
6.		Canon T2i	Y	stereo / -	Y	-	mini	2.0	-	-	-
7.		Canon T3	Y	stereo / mono	-	-	mini	2.0	-	-	-
8.		Canon T4i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon T5	Y	mono / mono	-	-	mini	2.0	-	-	-
10.		Canon T5i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
11.		Canon T6	Y	mono / mono	-	-	mini	2.0	Y	Y	-
12.		Canon T6s	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
13.		Fujifilm X-E2S	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
14.		Panasonic G3	Y	stereo / mono	-	-	mini	2.0	-	-	-
15.		Panasonic G5	Y	stereo / mono	-	-	mini	2.0	-	-	-
16.		Panasonic G6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
17.		Panasonic GM5	Y	stereo / mono	-	-	micro	2.0	Y	-	-

It is notable that the G7 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the T3i does not provide wifi capability.

Both the T3i and the G7 have been discontinued, but can regularly be found used on ebay. The T3i was replaced by the Canon T4i, while the G7 was followed by the Panasonic G85. Further information on the features and operation of the T3i and G7 can be found, respectively, in the Canon T3i Manual (free pdf) or the online Panasonic G7 Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon T3i and the Panasonic G7? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Canon EOS Rebel T3i:

• More detail: Offers more megapixels (17.9 vs 15.8MP) with a 8% higher linear resolution.
• 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.
• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• Longer lasting: Can take more shots (440 versus 350) on a single battery charge.
• More heavily discounted: Has been available for much longer (launched in February 2011).

Arguments in favor of the Panasonic Lumix DMC-G7:

• Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
• More framing info: Has an electronic viewfinder that displays shooting data.
• More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.53x).
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (7 vs 3.7 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• More compact: Is smaller (125x86mm vs 133x100mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 160g or 28 percent) and is thus easier to take along.
• More legacy lens friendly: Can use many non-native lenses via adapters.
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Faster buffer clearing: Has an SD card interface that supports the UHS-II standard.
• More modern: Reflects 4 years and 3 months of technical progress since the T3i launch.

If the number of relative strengths (bullet points above) is taken as a guide, the G7 is the clear winner of the contest (14 : 8 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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 T3i and the Panasonic G7 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the T3i or the G7 perform in practice. 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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	Street Price
1.		Canon T3i	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	EUR 549	ebay.com
2.		Panasonic G7	4/5	+ +	3.5/5	80/100	5/5	4.5/5	May 2015	EUR 699	ebay.com
3.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	EUR 599	ebay.com
4.		Canon SL1	4/5	+	..	78/100	4/5	4/5	Mar 2013	EUR 499	ebay.com
5.		Canon T1i	..	+ +	..	74/100	4.5/5	4.5/5	Mar 2009	EUR 699	ebay.com
6.		Canon T2i	..	+ +	..	77/100	4/5	4.5/5	Feb 2010	EUR 649	ebay.com
7.		Canon T3	..	80/100	..	69/100	4/5	4.5/5	Feb 2011	EUR 399	ebay.com
8.		Canon T4i	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	EUR 799	ebay.com
9.		Canon T5	3/5	+	..	..	4/5	4.5/5	Feb 2014	EUR 399	ebay.com
10.		Canon T5i	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	EUR 599	ebay.com
11.		Canon T6	4/5	o	4/5	73/100	4/5	4/5	Mar 2016	EUR 449	ebay.com
12.		Canon T6s	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	EUR 749	ebay.com
13.		Fujifilm X-E2S	4.5/5	..	..	77/100	4.5/5	4.5/5	Jan 2016	EUR 699	ebay.com
14.		Panasonic G3	3/5	+ +	..	75/100	4.5/5	5/5	May 2011	EUR 579	ebay.com
15.		Panasonic G5	3/5	+ +	..	..	4.5/5	4.5/5	Jul 2012	EUR 649	ebay.com
16.		Panasonic G6	4/5	+ +	..	..	5/5	4.5/5	Apr 2013	EUR 549	ebay.com
17.		Panasonic GM5	3.5/5	+	..	77/100	5/5	4.5/5	Sep 2014	EUR 799	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. 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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