Canon 1D Mark IV vs Pentax 645Z

The Canon EOS-1D Mark IV and the Pentax 645Z are two professional cameras that were revealed to the public, respectively, in October 2009 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-H (1D Mark IV) and a medium format (645Z) sensor. The Canon has a resolution of 16 megapixels, whereas the Pentax provides 51.1 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		Pentax 645Z
Digital single lens reflex		Digital single lens reflex
Canon EF mount lenses		Pentax 645 mount lenses
16 MP, APS-H Sensor		51.1 MP, Medium Format Sensor
1080/30p Video		1080/60i Video
ISO 100-12,800 (50 - 102,400)		ISO 100-204,800
Optical viewfinder		Optical viewfinder
3.0 LCD, 920k dots		3.2 LCD, 1037k dots
Fixed screen (not touch-sensitive)		Tilting screen (not touch-sensitive)
10 shutter flaps per second		3 shutter flaps per second
Weathersealed body		Weathersealed body
1500 shots per battery charge		650 shots per battery charge
156 x 157 x 80 mm, 1230 g		156 x 117 x 123 mm, 1550 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D Mark IV and the Pentax 645Z? 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 Pentax 645Z 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.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645Z is notably smaller (25 percent) than the Canon 1D Mark IV. However, the 645Z is markedly heavier (26 percent) than the 1D Mark IV. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 1D Mark IV gets 1500 shots out of its LP-E4 battery, while the 645Z can take 650 images on a single charge of its D-LI90 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 table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons 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 1D Mark IV	156 mm	157 mm	80 mm	1230 g	1500	Y	Oct 2009	4,999
2.		Pentax 645Z	156 mm	117 mm	123 mm	1550 g	650	Y	Apr 2014	8,499
3.		Canon 1D X Mark II	158 mm	168 mm	83 mm	1530 g	1210	Y	Feb 2016	5,999
4.		Canon 5DS	152 mm	116 mm	76 mm	930 g	700	Y	Feb 2015	3,699
5.		Canon 5DS R	152 mm	116 mm	76 mm	930 g	700	Y	Feb 2015	3,699
6.		Canon 1D X	158 mm	168 mm	83 mm	1551 g	1120	Y	Oct 2011	6,799
7.		Canon 60D	145 mm	106 mm	79 mm	755 g	1100	Y	Aug 2010	1,399
8.		Canon 7D	148 mm	111 mm	74 mm	860 g	800	Y	Sep 2009	1,699
9.		Canon 5D Mark II	152 mm	114 mm	75 mm	850 g	850	Y	Sep 2008	3,499
10.		Canon 1D Mark III	156 mm	157 mm	80 mm	1155 g	2200	Y	Feb 2007	4,499
11.		Canon 1D Mark II	156 mm	158 mm	80 mm	1535 g	1200	Y	Jan 2004	4,499
12.		Canon 1Ds Mark II	156 mm	158 mm	80 mm	1215 g	1200	Y	Sep 2004	7,999
13.		Hasselblad X1D	150 mm	98 mm	71 mm	725 g	..	Y	Jun 2016	8,995
14.		Leica SL	147 mm	104 mm	39 mm	847 g	400	Y	Oct 2015	7,450
15.		Nikon D4	160 mm	157 mm	91 mm	1340 g	2600	Y	Jan 2012	5,999
16.		Nikon D3S	160 mm	157 mm	88 mm	1240 g	4200	Y	Oct 2009	5,199
17.		Pentax 645D	156 mm	117 mm	119 mm	1480 g	800	Y	Mar 2010	9,995
Notes: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 1D Mark IV was launched at a markedly lower price (by 41 percent) than the 645Z, 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. 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 1D Mark IV features an APS-H sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 177 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 0.79. The sensor in the 1D Mark IV has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

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

With 51.1MP, the 645Z offers a higher resolution than the 1D Mark IV (16MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 5.70μm for the 1D Mark IV). Yet, the 645Z is a much more recent model (by 4 years and 5 months) than the 1D Mark IV, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax 645Z implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645Z for good quality output (200 dots per inch) amounts to 41.3 x 31 inches or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inches or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inches or 69.9 x 52.4 cm. The corresponding values for the Canon 1D Mark IV are 24.5 x 16.3 inches or 62.2 x 41.5 cm for good quality, 19.6 x 13.1 inches or 49.7 x 33.2 cm for very good quality, and 16.3 x 10.9 inches 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 Pentax 645Z are ISO 100 to ISO 204800 (no boost).

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 consideration, the 645Z offers substantially better image quality than the 1D Mark IV (overall score 27 points higher). The advantage is based on 3.2 bits higher color depth, 2.7 EV in additional dynamic range, and 1.8 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 1D Mark IV	APS-H	16.0	4896	3264	1080/30p	22.8	12.0	1320		74
2.		Pentax 645Z	Medium Format	51.1	8256	6192	1080/60i	26.0	14.7	4505		101
3.		Canon 1D X Mark II	Full Frame	20.0	5472	3648	4K/60p	24.1	13.5	3207		88
4.		Canon 5DS	Full Frame	50.3	8688	5792	1080/30p	24.7	12.4	2381		87
5.		Canon 5DS R	Full Frame	50.3	8688	5792	1080/30p	24.6	12.4	2308		86
6.		Canon 1D X	Full Frame	17.9	5184	3456	1080/30p	23.8	11.8	2786		82
7.		Canon 60D	APS-C	17.9	5184	3456	1080/30p	22.2	11.5	813		66
8.		Canon 7D	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	854		66
9.		Canon 5D Mark II	Full Frame	21.0	5616	3744	1080/30p	23.7	11.9	1815		79
10.		Canon 1D Mark III	APS-H	10.1	3888	2592	none	22.7	11.7	1078		71
11.		Canon 1D Mark II	APS-H	8.2	3504	2336	none	22.3	11.1	1003		66
12.		Canon 1Ds Mark II	Full Frame	16.6	4992	3328	none	23.3	11.3	1480		74
13.		Hasselblad X1D	Medium Format	51.3	8272	6200	1080/25p	26.2	14.8	4489		102
14.		Leica SL	Full Frame	24.0	6000	4000	4K/30p	25.0	13.4	1821		88
15.		Nikon D4	Full Frame	16.2	4928	3280	1080/30p	24.7	13.1	2965		89
16.		Nikon D3S	Full Frame	12.1	4256	2832	720/24p	23.5	12.0	3253		82
17.		Pentax 645D	Medium Format	39.5	7264	5440	none	24.6	12.6	1262		82

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the 645Z provides a faster frame rate than the 1D Mark IV. It can shoot movie footage at 1080/60i, while the Canon is limited to 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The 1D Mark IV and the 645Z are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the 1D Mark IV offers a wider field of view (100%) than the one in the 645Z (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645Z has a higher magnification (0.78x 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 Pentax 645Z along with similar information for a selection of comparators.

Core Features

		Camera Model	Viewfinder (Type or 000 dots)	Control Panel (yes/no)	LCD Size (inch)	LCD Resolution (000 dots)	LCD Attach- ment	Touch Screen (yes/no)	Mech Shutter Speed	Shutter Flaps (1/sec)	Built-in Flash (yes/no)	Built-in Image Stab
1.		Canon 1D Mark IV	optical	Y	3.0	920	fixed	n	1/8000s	10.0	n	n
2.		Pentax 645Z	optical	Y	3.2	1037	tilting	n	1/4000s	3.0	n	n
3.		Canon 1D X Mark II	optical	Y	3.2	1620	fixed	Y	1/8000s	16.0	n	n
4.		Canon 5DS	optical	Y	3.2	1040	fixed	n	1/8000s	5.0	n	n
5.		Canon 5DS R	optical	Y	3.2	1040	fixed	n	1/8000s	5.0	n	n
6.		Canon 1D X	optical	Y	3.2	1040	fixed	n	1/8000s	14.0	n	n
7.		Canon 60D	optical	Y	3.0	1040	swivel	n	1/8000s	5.3	Y	n
8.		Canon 7D	optical	Y	3.0	920	fixed	n	1/8000s	8.0	Y	n
9.		Canon 5D Mark II	optical	Y	3.0	920	fixed	n	1/8000s	3.9	n	n
10.		Canon 1D Mark III	optical	Y	3.0	230	fixed	n	1/8000s	10.0	n	n
11.		Canon 1D Mark II	optical	Y	2.0	230	fixed	n	1/8000s	8.3	n	n
12.		Canon 1Ds Mark II	optical	Y	2.0	230	fixed	n	1/8000s	4.0	n	n
13.		Hasselblad X1D	2360	n	3.0	920	fixed	Y	1/2000s	2.3	n	n
14.		Leica SL	4400	Y	3.0	1040	fixed	Y	1/8000s	11.0	n	n
15.		Nikon D4	optical	Y	3.2	921	fixed	n	1/8000s	11.0	n	n
16.		Nikon D3S	optical	Y	3.0	921	fixed	n	1/8000s	11.0	n	n
17.		Pentax 645D	optical	Y	3.0	921	fixed	n	1/4000s	1.1	n	n

The Pentax 645Z 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 645Z uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The 645Z 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 Pentax 645Z 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 Microphone	Internal Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Canon 1D Mark IV	Y	stereo	-	Y	-	mini	2.0	-	-	-
2.		Pentax 645Z	Y	stereo	mono	Y	-	mini	3.0	-	-	-
3.		Canon 1D X Mark II	Y	mono	mono	Y	Y	mini	3.0	-	-	-
4.		Canon 5DS	Y	mono	mono	Y	-	mini	3.0	-	-	-
5.		Canon 5DS R	Y	mono	mono	Y	-	mini	3.0	-	-	-
6.		Canon 1D X	Y	mono	-	Y	-	mini	2.0	-	-	-
7.		Canon 60D	Y	mono	mono	Y	-	mini	2.0	-	-	-
8.		Canon 7D	Y	mono	-	Y	-	mini	2.0	-	-	-
9.		Canon 5D Mark II	Y	mono	mono	Y	-	mini	2.0	-	-	-
10.		Canon 1D Mark III	Y	-	-	-	-	-	2.0	-	-	-
11.		Canon 1D Mark II	Y	-	-	-	-	-	1.1	-	-	-
12.		Canon 1Ds Mark II	Y	-	-	-	-	-	2.0	-	-	-
13.		Hasselblad X1D	Y	stereo	mono	Y	Y	mini	3.0	Y	-	-
14.		Leica SL	Y	stereo	mono	Y	Y	full	3.0	Y	-	-
15.		Nikon D4	Y	mono	mono	Y	Y	micro	2.0	-	-	-
16.		Nikon D3S	Y	stereo	-	-	-	mini	2.0	-	-	-
17.		Pentax 645D	Y	stereo	-	-	-	-	2.0	-	-	-

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

The 645Z is a recent model that features in the current product line-up of Pentax. In contrast, the 1D Mark IV has been discontinued (but 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 Pentax websites.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon 1D Mark IV and the Pentax 645Z? Which camera is better? 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.
• More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• Faster burst: Shoots at higher frequency (10 vs 3 flaps/sec) to capture the decisive moment.
• Less heavy: Is lighter (by 320g or 21 percent) and hence easier to carry around.
• More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
• Longer lasting: Can take more shots (1500 versus 650) on a single battery charge.
• More affordable: Was introduced into a lower priced category (41 percent cheaper at launch).
• More heavily discounted: Has been available for much longer (launched in October 2009).

Advantages of the Pentax 645Z:

• More detail: Has more megapixels (51.1 vs 16MP), which boosts linear resolution by 75%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better image quality: Scores substantially higher (27 points) in the DXO overall evaluation.
• Richer colors: Generates noticeably more natural colors (3.2 bits more color depth).
• More dynamic range: Captures a broader range of light and dark details (2.7 EV of extra DR).
• Better low-light sensitivity: Can shoot in dim conditions (1.8 stops ISO advantage).
• Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.58x).
• Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (1037k vs 920k dots).
• More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• More compact: Is smaller (156x117mm vs 156x157mm) and will fit more readily into a bag.
• Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Reflects 4 years and 5 months of technical progress since the 1D Mark IV launch.

If the count of relative strengths (bullet points above) is taken as a measure, the 645Z is the clear winner of the contest (16 : 9 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 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 Pentax 645Z place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 says little about, for example, the shooting experience and imaging performance of the 1D Mark IV and the 645Z in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], 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	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price (USD)			Street Price
1.		Canon 1D Mark IV	5/5	..	89/100	..	..	Oct 2009	4,999
2.		Pentax 645Z	5/5	..	..	4.5/5	5/5	Apr 2014	8,499
3.		Canon 1D X Mark II	..	..	89/100	4.5/5	4.5/5	Feb 2016	5,999
4.		Canon 5DS	..	+	83/100	4.5/5	4.5/5	Feb 2015	3,699
5.		Canon 5DS R	5/5	+	83/100	5/5	4.5/5	Feb 2015	3,699
6.		Canon 1D X	5/5	..	..	4.5/5	4.5/5	Oct 2011	6,799
7.		Canon 60D	5/5	+	79/100	4/5	4.5/5	Aug 2010	1,399
8.		Canon 7D	5/5	+ +	84/100	4.5/5	4.5/5	Sep 2009	1,699
9.		Canon 5D Mark II	4/5	91/100	79/100	4/5	..	Sep 2008	3,499
10.		Canon 1D Mark III	..	..	..	..	..	Feb 2007	4,499
11.		Canon 1D Mark II	..	..	+ +	..	..	Jan 2004	4,499
12.		Canon 1Ds Mark II	..	..	+ +	..	..	Sep 2004	7,999
13.		Hasselblad X1D	..	o	81/100	..	4/5	Jun 2016	8,995
14.		Leica SL	4/5	..	84/100	4.5/5	4/5	Oct 2015	7,450
15.		Nikon D4	..	..	..	4.5/5	4.5/5	Jan 2012	5,999
16.		Nikon D3S	5/5	..	89/100	4.5/5	5/5	Oct 2009	5,199
17.		Pentax 645D	5/5	..	..	..	..	Mar 2010	9,995
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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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 use the search menu 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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Specifications: Canon 1D Mark IV vs Pentax 645Z

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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