Canon 1Ds Mark III vs Fujifilm X-T20

The Canon EOS-1Ds Mark III and the Fujifilm X-T20 are two digital cameras that were officially introduced, respectively, in August 2007 and January 2017. The 1Ds Mark III is a DSLR, while the X-T20 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (1Ds Mark III) and an APS-C (X-T20) sensor. The Canon has a resolution of 21 megapixels, whereas the Fujifilm provides 24 MP.

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

Headline Specifications

Canon 1Ds Mark III		Fujifilm X-T20
Digital single lens reflex		Mirrorless system camera
Canon EF mount lenses		Fujifilm X mount lenses
21 MP, Full Frame Sensor		24 MP, APS-C Sensor
no Video		4K/30p Video
ISO 100-1600 (50-3200)		ISO 200-12800 (100-51200)
Optical viewfinder		Electronic viewfinder (2360k dots)
3.0" LCD, 230k dots		3.0" LCD, 1040k dots
Fixed screen (not touch-sensitive)		Tilting touchscreen
5 shutter flaps per second		8 shutter flaps per second
Weathersealed body		Not weather sealed
1800 shots per battery charge		350 shots per battery charge
150 x 160 x 80 mm, 1385 g		118 x 83 x 41 mm, 383 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1Ds Mark III and the Fujifilm X-T20? 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 1Ds Mark III and the Fujifilm X-T20 is provided 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 width, height and depth measures are rounded to the nearest millimeter.

The X-T20 can be obtained in two different colors (black, silver), while the 1Ds Mark III 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 Fujifilm X-T20 is considerably smaller (59 percent) than the Canon 1Ds Mark III. Moreover, the X-T20 is substantially lighter (72 percent) than the 1Ds Mark III. It is worth mentioning in this context that the 1Ds Mark III is splash and dust resistant, while the X-T20 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. 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 (1Ds Mark III) and the Fujinon X Lens Catalog (X-T20). Mirrorless cameras, such as the X-T20, 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 1Ds Mark III gets 1800 shots out of its LP-E4 battery, while the X-T20 can take 350 images on a single charge of its NP-W126S power pack. As can be seen in the images above, the 1Ds Mark III has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. The power pack in the X-T20 can be charged via the USB port, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications

	Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life (CIPA)	Weather Sealing (yes/no)	Camera Launch (announced)	Launch Price (USD)	Street Price (USD)	Used Price (USD)	Camera Model
	Canon 1Ds Mark III»	5.9 in	6.3 in	3.1 in	48.9 oz	1800	Y	Aug 2007	7,999	-		Canon 1Ds Mark III
	Fujifilm X-T20«	4.6 in	3.3 in	1.6 in	13.5 oz	350	n	Jan 2017	899			Fujifilm X-T20
	Canon 1D X Mark II« »	6.2 in	6.6 in	3.3 in	54.0 oz	1210	Y	Feb 2016	5,999			Canon 1D X Mark II
	Canon 1D C« »	6.2 in	6.5 in	3.3 in	54.5 oz	1120	Y	Apr 2012	14,999	-		Canon 1D C
	Canon 5D Mark III« »	6.0 in	4.6 in	3.0 in	33.5 oz	950	Y	Mar 2012	3,499	-		Canon 5D Mark III
	Canon 6D« »	5.7 in	4.4 in	2.8 in	27.2 oz	1090	Y	Sep 2012	2,099	-		Canon 6D
	Canon 1D X« »	6.2 in	6.6 in	3.3 in	54.7 oz	1120	Y	Oct 2011	6,799	-		Canon 1D X
	Canon 5D Mark II« »	6.0 in	4.5 in	3.0 in	30.0 oz	850	Y	Sep 2008	3,499	-		Canon 5D Mark II
	Canon 1D Mark III« »	6.1 in	6.2 in	3.1 in	40.7 oz	2200	Y	Feb 2007	4,499	-		Canon 1D Mark III
	Canon 1Ds Mark II« »	6.1 in	6.2 in	3.1 in	42.9 oz	1200	Y	Sep 2004	7,999	-		Canon 1Ds Mark II
	Canon 1Ds« »	6.1 in	6.2 in	3.1 in	44.6 oz	600	Y	Sep 2002	8,999	-		Canon 1Ds
	Fujifilm X-T30« »	4.6 in	3.3 in	1.9 in	13.5 oz	380	n	Feb 2019	899			Fujifilm X-T30
	Fujifilm X-A5« »	4.6 in	2.7 in	1.6 in	12.7 oz	450	n	Jan 2018	399	-		Fujifilm X-A5
	Fujifilm X-T100« »	4.8 in	3.3 in	1.9 in	15.8 oz	430	n	May 2018	599			Fujifilm X-T100
	Fujifilm X-E3« »	4.8 in	2.9 in	1.7 in	11.9 oz	350	n	Sep 2017	899			Fujifilm X-E3
	Fujifilm X-T10« »	4.6 in	3.3 in	1.6 in	13.4 oz	350	n	May 2015	799	-		Fujifilm X-T10
	Nikon D3X« »	6.3 in	6.2 in	3.5 in	44.4 oz	4400	Y	Dec 2008	7,999	-		Nikon D3X
Convert to Metric
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The X-T20 was launched at a markedly lower price (by 89 percent) than the 1Ds Mark III, 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. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 1Ds Mark III features a full frame sensor and the Fujifilm X-T20 an APS-C sensor. The sensor area in the X-T20 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

In terms of underlying technology, both cameras are build around CMOS sensors.

Despite having a smaller sensor, the X-T20 offers a higher resolution of 24 megapixels, compared with 21 MP of the 1Ds Mark III. 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 3.92μm versus 6.41μm for the 1Ds Mark III). However, it should be noted that the X-T20 is much more recent (by 9 years and 5 months) than the 1Ds Mark III, 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 X-T20 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Fujifilm X-T20 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the X-T20 for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Canon 1Ds Mark III are 28.1 x 18.7 inch or 71.3 x 47.5 cm for good quality, 22.5 x 15 inch or 57.1 x 38 cm for very good quality, and 18.7 x 12.5 inch or 47.5 x 31.7 cm for excellent quality prints.

The X-T20 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS-1Ds Mark III has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 50-3200. The corresponding ISO settings for the Fujifilm X-T20 are ISO 200 to ISO 12800, with the possibility to increase the ISO range to 100-51200.

For many cameras, data on sensor performance has been reported by DXO Mark. 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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Many modern cameras are not only capable of taking still images, but can also record movies. The X-T20 indeed provides for movie recording, while the 1Ds Mark III does not. The highest resolution format that the X-T20 can use is 4K/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the X-T20 has an electronic viewfinder (2360k dots), while the 1Ds Mark III 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 1Ds Mark III has a higher magnification than the one of the X-T20 (0.76x vs 0.62x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Canon 1Ds Mark III and Fujifilm X-T20 in connection with corresponding information for a sample of similar cameras.

One feature that is present on the 1Ds Mark III, but is missing on the X-T20 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

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 X-T20 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 Fujifilm X-T20 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 1Ds Mark III writes its imaging data to Compact Flash or SDHC cards, while the X-T20 uses SDXC cards. The X-T20 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 1Ds Mark III 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-1Ds Mark III and Fujifilm X-T20 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

It is notable that the X-T20 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 1Ds Mark III does not offer wifi capability.

Studio photographers will appreciate that the Canon 1Ds Mark III (unlike the X-T20) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The X-T20 is a recent model that features in the current product line-up of Fujifilm. In contrast, the 1Ds Mark III has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 1Ds Mark III was succeeded by the Canon 1DX. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Fujifilm websites.

Review summary

So what is the bottom line? Which of the two cameras – the Canon 1Ds Mark III or the Fujifilm X-T20 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS-1Ds Mark III:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.76x vs 0.62x).
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
• Longer lasting: Can take more shots (1800 versus 350) on a single battery charge.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• More heavily discounted: Has been available for much longer (launched in August 2007).

Advantages of the Fujifilm X-T20:

• More detail: Has more megapixels (24 vs 21MP), which boosts linear resolution by 7%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Broader imaging potential: Can capture not only stills but also 4K/30p video.
• 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 (1040k vs 230k dots).
• More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (8 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 (118x83mm vs 150x160mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 1002g or 72 percent) and is thus easier to take along.
• Easier travel charging: Can be conveniently charged via its USB port.
• More legacy lens friendly: Can use many non-native lenses via adapters.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• 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-I standard.
• More affordable: Was introduced into a lower priced category (89 percent cheaper at launch).
• More modern: Reflects 9 years and 5 months of technical progress since the 1Ds Mark III launch.

If the number of relative strengths (bullet points above) is taken as a guide, the X-T20 is the clear winner of the contest (19 : 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 1Ds Mark III and the Fujifilm X-T20 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the 1Ds Mark III or the X-T20 perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major 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.

Review Scores

	Camera Model						Camera Launch (announced)	Launch Price (USD)	Street Price (USD)	Used Price (USD)	Camera Model
	Canon 1Ds Mark III»	-	+ +	4.5/5	-	-	Aug 2007	7,999	-		Canon 1Ds Mark III
	Fujifilm X-T20«	+ +	82/100	5/5	-	4.5/5	Jan 2017	899			Fujifilm X-T20
	Canon 1D X Mark II« »	-	89/100	4.5/5	5/5	4.5/5	Feb 2016	5,999			Canon 1D X Mark II
	Canon 1D C« »	-	-	-	-	-	Apr 2012	14,999	-		Canon 1D C
	Canon 5D Mark III« »	+ +	82/100	4.5/5	5/5	4.5/5	Mar 2012	3,499	-		Canon 5D Mark III
	Canon 6D« »	+ +	83/100	4.5/5	4.5/5	4.5/5	Sep 2012	2,099	-		Canon 6D
	Canon 1D X« »	-	-	4.5/5	4.5/5	4.5/5	Oct 2011	6,799	-		Canon 1D X
	Canon 5D Mark II« »	91/100	79/100	4/5	5/5	-	Sep 2008	3,499	-		Canon 5D Mark II
	Canon 1D Mark III« »	-	-	-	o	-	Feb 2007	4,499	-		Canon 1D Mark III
	Canon 1Ds Mark II« »	-	+ +	-	-	-	Sep 2004	7,999	-		Canon 1Ds Mark II
	Canon 1Ds« »	-	+ +	-	-	-	Sep 2002	8,999	-		Canon 1Ds
	Fujifilm X-T30« »	+ +	84/100	4.5/5	-	4.5/5	Feb 2019	899			Fujifilm X-T30
	Fujifilm X-A5« »	+	-	4/5	4/5	3.5/5	Jan 2018	399	-		Fujifilm X-A5
	Fujifilm X-T100« »	+	79/100	4/5	-	4.5/5	May 2018	599			Fujifilm X-T100
	Fujifilm X-E3« »	+	84/100	4.5/5	4.5/5	4.5/5	Sep 2017	899			Fujifilm X-E3
	Fujifilm X-T10« »	+ +	80/100	5/5	4/5	5/5	May 2015	799	-		Fujifilm X-T10
	Nikon D3X« »	-	86/100	4/5	5/5	5/5	Dec 2008	7,999	-		Nikon D3X
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

Specifications: Canon 1Ds Mark III vs Fujifilm X-T20

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.

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