Canon 1D Mark IV vs Panasonic GX9

The Canon EOS-1D Mark IV and the Panasonic Lumix DC-GX9 are two digital cameras that were officially introduced, respectively, in October 2009 and February 2018. The 1D Mark IV is a DSLR, while the GX9 is a mirrorless interchangeable lens camera. The cameras are based on an APS-H (1D Mark IV) and a Four Thirds (GX9) sensor. The Canon has a resolution of 16 megapixels, whereas the Panasonic provides 20.2 MP.

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

Headline Specifications

Canon 1D Mark IV		Panasonic GX9
Digital single lens reflex		Mirrorless system camera
Canon EF mount lenses		Micro Four Thirds lenses
16 MP, APS-H Sensor		20.2 MP, Four Thirds Sensor
1080/30p Video		4K/30p Video
ISO 100-12800 (50-102400)		ISO 200-25600
Optical viewfinder		Electronic viewfinder (2760k dots)
3.0" LCD, 920k dots		3.0" LCD, 1240k dots
Fixed screen (not touch-sensitive)		Tilting touchscreen
10 shutter flaps per second		9 shutter flaps per second
Lens stabilization only		In-body stabilization
Weathersealed body		Not weather sealed
1500 shots per battery charge		260 shots per battery charge
156 x 157 x 80 mm, 1230 g		124 x 72 x 47 mm, 407 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D Mark IV and the Panasonic Lumix DC-GX9? 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 physical size and weight of the Canon 1D Mark IV and the Panasonic GX9 are illustrated 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 size dimensions are rounded to the nearest millimeter.

The GX9 can be obtained in two different colors (black, silver), while the 1D Mark IV 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 GX9 is considerably smaller (64 percent) than the Canon 1D Mark IV. Moreover, the GX9 is substantially lighter (67 percent) than the 1D Mark IV. It is worth mentioning in this context that the 1D Mark IV is splash and dust resistant, while the GX9 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 (1D Mark IV) and the Micro Four Thirds Lens Catalog (GX9). Mirrorless cameras, such as the GX9, 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 1D Mark IV gets 1500 shots out of its LP-E4 battery, while the GX9 can take 260 images on a single charge of its DMW-BLG10 power pack. As can be seen in the images above, the 1D Mark IV has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. The power pack in the GX9 can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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 1D Mark IV»	6.1 in	6.2 in	3.1 in	43.4 oz	1500	Y	Oct 2009	4,999	-		Canon 1D Mark IV
	Panasonic GX9«	4.9 in	2.8 in	1.9 in	14.4 oz	260	n	Feb 2018	849			Panasonic GX9
	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 X« »	6.2 in	6.6 in	3.3 in	54.7 oz	1120	Y	Oct 2011	6,799	-		Canon 1D X
	Canon 60D« »	5.7 in	4.2 in	3.1 in	26.6 oz	1100	Y	Aug 2010	1,399	-		Canon 60D
	Canon 7D« »	5.8 in	4.4 in	2.9 in	30.3 oz	800	Y	Sep 2009	1,699	-		Canon 7D
	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 1D Mark II« »	6.1 in	6.2 in	3.1 in	54.1 oz	1200	Y	Jan 2004	4,499	-		Canon 1D Mark II
	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
	Nikon D4« »	6.3 in	6.2 in	3.6 in	47.3 oz	2600	Y	Jan 2012	5,999	-		Nikon D4
	Nikon D3S« »	6.3 in	6.2 in	3.5 in	43.7 oz	4200	Y	Oct 2009	5,199	-		Nikon D3S
	Olympus E-M10 II« »	4.7 in	3.3 in	1.9 in	13.8 oz	320	n	Aug 2015	649	-		Olympus E-M10 II
	Panasonic G95« »	5.1 in	3.7 in	3.0 in	18.9 oz	290	Y	Apr 2019	999			Panasonic G95
	Panasonic LX100 II« »	4.5 in	2.6 in	2.6 in	13.8 oz	300	n	Aug 2018	999			Panasonic LX100 II
	Panasonic ZS200« »	4.4 in	2.6 in	1.8 in	12.0 oz	370	n	Feb 2018	799			Panasonic ZS200
	Panasonic GX8« »	5.2 in	3.1 in	2.5 in	17.2 oz	330	Y	Jul 2015	1,199	-		Panasonic GX8
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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The GX9 was launched at a markedly lower price (by 83 percent) than the 1D Mark IV, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Canon 1D Mark IV features an APS-H sensor and the Panasonic GX9 a Four Thirds sensor. The sensor area in the GX9 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 2.0. The sensor in the 1D Mark IV has a native 3:2 aspect ratio, while the one in the GX9 offers a 4:3 aspect.

Despite having a smaller sensor, the GX9 offers a higher resolution of 20.2 megapixels, compared with 16 MP of the 1D Mark IV. 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 3.34μm versus 5.70μm for the 1D Mark IV). However, it should be noted that the GX9 is much more recent (by 8 years and 3 months) than the 1D Mark IV, 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 GX9 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Panasonic GX9 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GX9 for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inch or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inch or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inch or 43.9 x 32.9 cm. The corresponding values for the Canon 1D Mark IV are 24.5 x 16.3 inch or 62.2 x 41.5 cm for good quality, 19.6 x 13.1 inch or 49.7 x 33.2 cm for very good quality, and 16.3 x 10.9 inch or 41.5 x 27.6 cm for excellent quality prints.

The Canon EOS-1D Mark IV has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 50-102400. The corresponding ISO settings for the Panasonic Lumix DC-GX9 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the GX9 provides a better video resolution than the 1D Mark IV. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the GX9 has an electronic viewfinder (2760k dots), while the 1D Mark IV 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 GX9 has a higher magnification than the one of the 1D Mark IV (0.70x vs 0.58x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Canon 1D Mark IV and Panasonic GX9 along with similar information for a selection of comparators.

One feature that is present on the 1D Mark IV, but is missing on the GX9 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 GX9 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 GX9 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 1D Mark IV writes its imaging data to Compact Flash or SDHC cards, while the GX9 uses SDXC cards. The 1D Mark IV features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX9 only has one slot. The GX9 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 1D Mark IV 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-1D Mark IV and Panasonic Lumix DC-GX9 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

It is notable that the 1D Mark IV has a microphone port, which is missing on the GX9. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.

Studio photographers will appreciate that the Canon 1D Mark IV (unlike the GX9) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The GX9 is a recent model that features in the current product line-up of Panasonic. In contrast, the 1D Mark IV has been discontinued (but it can be found pre-owned on eBay). There has not been a direct replacement model for the 1D Mark IV from Canon. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Panasonic websites.

Review summary

So how do things add up? Which of the two cameras – the Canon 1D Mark IV or the Panasonic GX9 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Canon EOS-1D Mark IV:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Better sound: Can connect to an external microphone for higher quality sound recording.
• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• 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 (1500 versus 260) 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.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More heavily discounted: Has been available for much longer (launched in October 2009).

Advantages of the Panasonic Lumix DC-GX9:

• More detail: Has more megapixels (20.2 vs 16MP), which boosts linear resolution by 10%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
• More framing info: Has an electronic viewfinder that displays shooting data.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.58x).
• More detailed LCD: Has a higher resolution rear screen (1240k vs 920k 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.
• 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 (124x72mm vs 156x157mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 823g or 67 percent) and is thus easier to take along.
• Easier travel charging: Can be conveniently charged via its USB port.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• 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.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More affordable: Was introduced into a lower priced category (83 percent cheaper at launch).
• More modern: Reflects 8 years and 3 months of technical progress since the 1D Mark IV launch.

If the number of relative strengths (bullet points above) is taken as a guide, the GX9 is the clear winner of the contest (20 : 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 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 1D Mark IV and the Panasonic GX9 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 1D Mark IV or the GX9. 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 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.

Review Scores

	Camera Model						Camera Launch (announced)	Launch Price (USD)	Street Price (USD)	Used Price (USD)	Camera Model
	Canon 1D Mark IV»	-	89/100	-	5/5	-	Oct 2009	4,999	-		Canon 1D Mark IV
	Panasonic GX9«	+	84/100	4.5/5	4.5/5	4.5/5	Feb 2018	849			Panasonic GX9
	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 X« »	-	-	4.5/5	4.5/5	4.5/5	Oct 2011	6,799	-		Canon 1D X
	Canon 60D« »	+	79/100	4/5	5/5	4.5/5	Aug 2010	1,399	-		Canon 60D
	Canon 7D« »	+ +	84/100	4.5/5	5/5	4.5/5	Sep 2009	1,699	-		Canon 7D
	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 1D Mark II« »	-	+ +	-	o	-	Jan 2004	4,499	-		Canon 1D Mark II
	Canon 1Ds Mark II« »	-	+ +	-	-	-	Sep 2004	7,999	-		Canon 1Ds Mark II
	Nikon D4« »	-	-	4.5/5	-	4.5/5	Jan 2012	5,999	-		Nikon D4
	Nikon D3S« »	-	89/100	4.5/5	5/5	5/5	Oct 2009	5,199	-		Nikon D3S
	Olympus E-M10 II« »	+ +	80/100	5/5	5/5	5/5	Aug 2015	649	-		Olympus E-M10 II
	Panasonic G95« »	+	83/100	4.5/5	-	4.5/5	Apr 2019	999			Panasonic G95
	Panasonic LX100 II« »	+	82/100	4.5/5	-	4.5/5	Aug 2018	999			Panasonic LX100 II
	Panasonic ZS200« »	+ +	81/100	4.5/5	-	4.5/5	Feb 2018	799			Panasonic ZS200
	Panasonic GX8« »	+	82/100	4.5/5	5/5	4.5/5	Jul 2015	1,199	-		Panasonic GX8
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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. Also, please note that some of the review sites have changed their methodology and reporting over time.

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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

Specifications: Canon 1D Mark IV vs Panasonic GX9

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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