Canon R8 vs Sony A900

The Canon EOS R8 and the Sony Alpha A900 are two digital cameras that were revealed to the public, respectively, in February 2023 and September 2008. The R8 is a mirrorless interchangeable lens camera, while the A900 is a DSLR. Both cameras are equipped with a full frame sensor. The Canon has a resolution of 24 megapixels, whereas the Sony provides 24.4 MP.

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

Headline Specifications

Canon R8		Sony A900
Mirrorless system camera		Digital single lens reflex
Canon RF mount lenses		Sony A mount lenses
24 MP – Full Frame sensor		24.4 MP – Full Frame sensor
4k/60p Video		no Video
ISO 100-102,400 (100 - 204,800)		ISO 200-3,200 (100 - 6,400)
Electronic viewfinder (2360k dots)		Optical viewfinder
3.0" LCD – 1620k dots		3.0" LCD – 922k dots
Swivel touchscreen		Fixed screen (not touch-sensitive)
6 shutter flaps per second		5 shutter flaps per second
Lens stabilization only		In-body stabilization
not weather sealed		Weathersealed body
220 shots per battery charge		880 shots per battery charge
133 x 86 x 70 mm, 461 g		156 x 117 x 82 mm, 895 g

Check R8 price at
amazon.com
Check A900 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS R8 and the Sony Alpha A900? 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

The side-by-side display below illustrates the physical size and weight of the Canon R8 and the Sony A900. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A900 is considerably larger (60 percent) than the Canon R8. Moreover, the A900 is substantially heavier (94 percent) than the R8. It is noteworthy in this context that the A900 is splash and dust-proof, while the R8 does not feature any corresponding weather-sealing.

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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the R8 gets 220 shots out of its Canon LP-E17 battery, while the A900 can take 880 images on a single charge of its Sony NP-FM500H power pack. The power pack in the R8 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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 R8	133 mm	86 mm	70 mm	461 g	220	n	Feb 2023	EUR 1 799	amazon.com
2.		Sony A900	156 mm	117 mm	82 mm	895 g	880	Y	Sep 2008	EUR 2 799	ebay.com
3.		Canon 5D Mark II	152 mm	114 mm	75 mm	850 g	850	Y	Sep 2008	EUR 3 299	ebay.com
4.		Canon 77D	131 mm	100 mm	76 mm	540 g	600	n	Feb 2017	EUR 899	ebay.com
5.		Canon 200D	122 mm	93 mm	70 mm	453 g	650	n	Jun 2017	EUR 599	ebay.com
6.		Canon 2000D	129 mm	101 mm	78 mm	475 g	500	n	Feb 2018	EUR 499	amazon.com
7.		Canon G1 X Mark III	115 mm	78 mm	51 mm	399 g	200	Y	Oct 2017	EUR 1 199	ebay.com
8.		Canon M5	116 mm	89 mm	61 mm	427 g	295	n	Sep 2016	EUR 1 129	ebay.com
9.		Canon M6	112 mm	68 mm	45 mm	390 g	295	n	Feb 2017	EUR 799	ebay.com
10.		Canon M50	116 mm	88 mm	59 mm	390 g	235	n	Feb 2018	EUR 779	ebay.com
11.		Canon R10	123 mm	88 mm	83 mm	429 g	450	n	May 2022	EUR 979	amazon.com
12.		Canon RP	133 mm	85 mm	70 mm	485 g	250	n	Feb 2019	EUR 1 499	amazon.com
13.		Panasonic S1	149 mm	110 mm	97 mm	1017 g	400	Y	Feb 2019	EUR 2 499	ebay.com
14.		Sony A99	147 mm	111 mm	78 mm	812 g	500	Y	Sep 2012	EUR 2 799	ebay.com
15.		Sony A99 II	143 mm	104 mm	76 mm	849 g	490	Y	Sep 2016	EUR 3 599	ebay.com
16.		Sony A850	156 mm	117 mm	82 mm	895 g	880	Y	Aug 2009	EUR 1 999	ebay.com
17.		Sony NEX-7	120 mm	67 mm	43 mm	400 g	430	n	Aug 2011	EUR 1 199	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

Any camera decision will naturally be influenced heavily by the price. 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 R8 was launched at a markedly lower price (by 50 percent) than the A900, which puts it into a different market segment. 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 imaging sensor is a crucial determinant 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

With 24.4MP, the A900 offers a higher resolution than the R8 (24MP), but the A900 has marginally smaller individual pixels (pixel pitch of 5.94μm versus 5.98μm for the R8). Yet, the R8 is a much more recent model (by 14 years and 5 months) than the A900, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The R8 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS R8 has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 100-204800. The corresponding ISO settings for the Sony Alpha A900 are ISO 200 to ISO 3200, with the possibility to increase the ISO range to 100-6400.

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"). Of the two cameras under review, the R8 provides substantially higher image quality than the A900, with an overall score that is 14 points higher. This advantage is based on 0.8 bits higher color depth, 2.4 EV in additional dynamic range, and 1.2 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Canon R8	Full Frame	24.0	6000	4000	4k/60p	24.5	14.7	3295	93
2.		Sony A900	Full Frame	24.4	6048	4032	none	23.7	12.3	1431	79
3.		Canon 5D Mark II	Full Frame	21.0	5616	3744	1080/30p	23.7	11.9	1815	79
4.		Canon 77D	APS-C	24.0	6000	4000	1080/60p	23.6	13.3	971	78
5.		Canon 200D	APS-C	24.0	6000	4000	1080/60p	23.6	13.4	1041	79
6.		Canon 2000D	APS-C	24.0	6000	4000	1080/30p	22.6	11.9	1009	71
7.		Canon G1 X Mark III	APS-C	24.0	6000	4000	1080/60p	23.8	13.2	1649	81
8.		Canon M5	APS-C	24.0	6000	4000	1080/60p	23.4	12.4	1262	77
9.		Canon M6	APS-C	24.0	6000	4000	1080/60p	23.4	12.6	1317	78
10.		Canon M50	APS-C	24.0	6000	4000	4K/24p	23.8	13.3	1684	81
11.		Canon R10	APS-C	24.0	6000	4000	4k/60p	24.1	13.8	2085	84
12.		Canon RP	Full Frame	26.0	6240	4160	4K/30p	24.3	11.9	2977	85
13.		Panasonic S1	Full Frame	24.0	6000	4000	4K/60p	25.2	14.5	3333	95
14.		Sony A99	Full Frame	24.0	6000	4000	1080/60p	25.0	14.0	1555	89
15.		Sony A99 II	Full Frame	42.2	7952	5304	4K/30p	25.4	13.4	2317	92
16.		Sony A850	Full Frame	24.4	6048	4032	none	23.8	12.2	1415	79
17.		Sony NEX-7	APS-C	24.0	6000	4000	1080/60i	24.1	13.4	1016	81
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 can also record movies. The R8 indeed provides movie recording capabilities, while the A900 does not. The highest resolution format that the R8 can use is 4k/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the R8 has an electronic viewfinder (2360k dots), while the A900 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the A900 has a higher magnification than the one of the R8 (0.74x vs 0.70x), 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 R8, the Sony A900, 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 R8	2360	n	3.0 / 1620	swivel	Y	1/4000s	6.0/s	n	n
2.		Sony A900	optical	Y	3.0 / 922	fixed	n	1/8000s	5.0/s	n	Y
3.		Canon 5D Mark II	optical	Y	3.0 / 920	fixed	n	1/8000s	3.9/s	n	n
4.		Canon 77D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
5.		Canon 200D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
6.		Canon 2000D	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
7.		Canon G1 X Mark III	2360	n	3.0 / 1040	swivel	Y	1/2000s	9.0/s	Y	Y
8.		Canon M5	2360	n	3.2 / 1620	tilting	Y	1/4000s	9.0/s	Y	n
9.		Canon M6	optional	n	3.0 / 1040	tilting	Y	1/4000s	9.0/s	Y	n
10.		Canon M50	2360	n	3.0 / 1040	swivel	Y	1/4000s	10.0/s	Y	n
11.		Canon R10	2360	n	3.0 / 1040	swivel	Y	1/8000s	15.0/s	Y	n
12.		Canon RP	2360	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	n	n
13.		Panasonic S1	5760	Y	3.2 / 2100	full-flex	Y	1/8000s	9.0/s	n	Y
14.		Sony A99	2359	Y	3.0 / 1229	full-flex	n	1/8000s	6.0/s	n	Y
15.		Sony A99 II	2400	Y	3.0 / 1229	full-flex	n	1/8000s	12.0/s	n	Y
16.		Sony A850	optical	Y	3.0 / 922	fixed	n	1/8000s	3.0/s	n	Y
17.		Sony NEX-7	2359	n	3.0 / 921	tilting	n	1/4000s	10.0/s	Y	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 R8 has a touchscreen, while the A900 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 R8 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 Canon R8 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.

The R8 writes its imaging data to SDXC cards, while the A900 uses Compact Flash or Memory Stick PRO Duo cards. The A900 features dual card slots, which can be very useful in case a memory card fails. In contrast, the R8 only has one slot.

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 R8 and Sony Alpha A900 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 R8	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
2.		Sony A900	Y	- / -	-	-	mini	2.0	-	-	-
3.		Canon 5D Mark II	Y	mono / mono	Y	-	mini	2.0	-	-	-
4.		Canon 77D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
5.		Canon 200D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
6.		Canon 2000D	Y	mono / mono	-	-	mini	2.0	Y	Y	-
7.		Canon G1 X Mark III	Y	stereo / mono	-	-	micro	2.0	Y	Y	Y
8.		Canon M5	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
9.		Canon M6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
10.		Canon M50	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
11.		Canon R10	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
12.		Canon RP	Y	stereo / mono	Y	Y	micro	2.0	Y	-	Y
13.		Panasonic S1	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
14.		Sony A99	Y	stereo / mono	Y	Y	mini	2.0	-	-	-
15.		Sony A99 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	Y
16.		Sony A850	Y	- / -	-	-	mini	2.0	-	-	-
17.		Sony NEX-7	Y	stereo / mono	Y	-	mini	2.0	-	-	-

It is notable that the R8 offers wifi support, while the A900 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Studio photographers will appreciate that the Sony A900 (unlike the R8) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The R8 is a recent model that features in the current product line-up of Canon. In contrast, the A900 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A900 was succeeded by the Sony A99. Further information on the features and operation of the R8 and A900 can be found, respectively, in the Canon R8 Manual (free pdf) or the online Sony A900 Manual.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Canon R8 or the Sony A900 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Canon EOS R8:

• Better image quality: Scores substantially higher (14 points) in the DXO overall assessment.
• More dynamic range: Captures a larger spectrum of light and dark details (2.4 EV of extra DR).
• Better low-light sensitivity: Requires less light for good images (1.2 stops ISO advantage).
• Broader imaging potential: Can record not only still images but also 4k/60p movies.
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• More framing info: Has an electronic viewfinder that displays shooting data.
• More detailed LCD: Has a higher resolution rear screen (1620k vs 922k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Faster burst: Shoots at higher frequency (6 vs 5 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 (133x86mm vs 156x117mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 434g or 48 percent) and hence easier to carry around.
• Easier travel charging: Can be conveniently charged via its USB port.
• More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
• More modern: Reflects 14 years and 5 months of technical progress since the A900 launch.

Arguments in favor of the Sony Alpha A900:

• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.70x).
• Easier setting verification: Features a control panel on top to check shooting parameters.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• Longer lasting: Gets more shots (880 versus 220) out of a single battery charge.
• Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More heavily discounted: Has been around for much longer (launched in September 2008).

If the number of relative strengths (bullet points above) is taken as a guide, the R8 is the clear winner of the match-up (22 : 10 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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 R8 and the Sony A900 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens 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 R8 or the A900. 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 expert reviews 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	Street Price
1.		Canon R8	4.5/5	+ +	4.5/5	87/100	4/5	4.5/5	Feb 2023	EUR 1 799	amazon.com
2.		Sony A900	..	+ +	..	+ +	4.5/5	5/5	Sep 2008	EUR 2 799	ebay.com
3.		Canon 5D Mark II	4/5	91/100	..	79/100	4/5	..	Sep 2008	EUR 3 299	ebay.com
4.		Canon 77D	4.5/5	..	4/5	82/100	4.5/5	4/5	Feb 2017	EUR 899	ebay.com
5.		Canon 200D	4/5	+ +	4/5	78/100	4.5/5	4.5/5	Jun 2017	EUR 599	ebay.com
6.		Canon 2000D	3/5	o	3.5/5	..	3.5/5	3.5/5	Feb 2018	EUR 499	amazon.com
7.		Canon G1 X Mark III	5/5	+	4/5	79/100	4.5/5	4.5/5	Oct 2017	EUR 1 199	ebay.com
8.		Canon M5	4/5	+	4/5	82/100	4/5	4/5	Sep 2016	EUR 1 129	ebay.com
9.		Canon M6	..	..	..	80/100	4/5	4/5	Feb 2017	EUR 799	ebay.com
10.		Canon M50	..	+	4/5	79/100	..	3.5/5	Feb 2018	EUR 779	ebay.com
11.		Canon R10	4/5	..	4.5/5	87/100	4/5	4.5/5	May 2022	EUR 979	amazon.com
12.		Canon RP	4/5	+	4/5	..	4.5/5	4/5	Feb 2019	EUR 1 499	amazon.com
13.		Panasonic S1	4.5/5	+ +	4.5/5	88/100	4.5/5	4/5	Feb 2019	EUR 2 499	ebay.com
14.		Sony A99	5/5	..	..	84/100	4.5/5	4.5/5	Sep 2012	EUR 2 799	ebay.com
15.		Sony A99 II	..	..	4.5/5	85/100	4.5/5	4.5/5	Sep 2016	EUR 3 599	ebay.com
16.		Sony A850	3/5	..	..	75/100	..	4.5/5	Aug 2009	EUR 1 999	ebay.com
17.		Sony NEX-7	5/5	+ +	..	81/100	4.5/5	5/5	Aug 2011	EUR 1 199	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, 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 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? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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