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Canon 20D vs Pentax 645Z

The Canon EOS 20D and the Pentax 645Z are two digital cameras that were revealed to the public, respectively, in August 2004 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (20D) and a medium format (645Z) sensor. The Canon has a resolution of 8.2 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 20D
versus
Pentax 645Z
Canon 20D   Pentax 645Z
Digital single lens reflex Digital single lens reflex
Canon EF mount lenses Pentax 645 mount lenses
8.2 MP – APS-C sensor 51.1 MP – Medium Format sensor
no Video 1080/60i Video
ISO 100-1,600 (100 - 3,200) ISO 100-204,800
Optical viewfinder Optical viewfinder
1.8" LCD – 118k dots 3.2" LCD – 1037k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
5 shutter flaps per second 3 shutter flaps per second
not weather sealedWeathersealed body
700 shots per battery charge650 shots per battery charge
144 x 106 x 72 mm, 770 g 156 x 117 x 123 mm, 1550 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 20D 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.

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Body comparison

The physical size and weight of the Canon 20D 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 perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

Size Canon 20D vs Pentax 645Z
Compare 20D versus 645Z top
Comparison 20D or 645Z rear

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 larger (20 percent) than the Canon 20D. Moreover, the 645Z is substantially heavier (101 percent) than the 20D. It is noteworthy in this context that the 645Z is splash and dust-proof, while the 20D 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 20D gets 700 shots out of its Canon BP-511A battery, while the 645Z can take 650 images on a single charge of its Pentax D-LI90 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 20D 144 mm 106 mm 72 mm 770 g 700 n Aug 2004 1,499ebay.com
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499ebay.com
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
5.
 
Canon 7D II 149 mm 112 mm 78 mm 910 g 670 Y Sep 2014 1,799ebay.com
6.
 
Canon 60D 145 mm 106 mm 79 mm 755 g 1100 Y Aug 2010 1,399ebay.com
7.
 
Canon 7D 148 mm 111 mm 74 mm 860 g 800 Y Sep 2009 1,699ebay.com
8.
 
Canon 50D 146 mm 108 mm 74 mm 822 g 800 Y Aug 2008 1,299ebay.com
9.
 
Canon 40D 146 mm 108 mm 74 mm 822 g 750 n Aug 2007 1,299ebay.com
10.
 
Canon 30D 144 mm 106 mm 74 mm 785 g 750 n Feb 2006 1,399ebay.com
11.
 
Canon XT 127 mm 94 mm 64 mm 540 g 400 n Feb 2005 899ebay.com
12.
 
Canon 10D 150 mm 107 mm 75 mm 850 g 500 n Feb 2003 1,999ebay.com
13.
 
Canon Rebel 142 mm 99 mm 72 mm 649 g 400 n Aug 2003 899ebay.com
14.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995ebay.com
15.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450ebay.com
16.
 
Nikon D200 147 mm 113 mm 74 mm 920 g 400 Y Nov 2005 1,699ebay.com
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.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 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 20D was launched at a markedly lower price (by 82 percent) than the 645Z, which puts it into a different market segment. 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. 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 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 20D features an APS-C sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 325 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 0.79. The sensor in the 20D has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Canon 20D and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the 20D (8.2MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 6.42μm for the 20D). Yet, the 645Z is a much more recent model (by 9 years and 7 months) than the 20D, 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 20D are 17.5 x 11.7 inches or 44.5 x 29.7 cm for good quality, 14 x 9.3 inches or 35.6 x 23.7 cm for very good quality, and 11.7 x 7.8 inches or 29.7 x 19.8 cm for excellent quality prints.

The Canon EOS 20D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (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.

20D versus 645Z MP

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 consideration, the 645Z offers substantially better image quality than the 20D (overall score 39 points higher). The advantage is based on 4.1 bits higher color depth, 3.7 EV in additional dynamic range, and 2.6 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon 20D APS-C 8.2 3504 2336none21.911.072162
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
5.
 
Canon 7D II APS-C 20.0 5472 36481080/60p22.411.8108270
6.
 
Canon 60D APS-C 17.9 5184 34561080/30p22.211.581366
7.
 
Canon 7D APS-C 17.9 5184 34561080/30p22.011.785466
8.
 
Canon 50D APS-C 15.1 4752 3168none21.811.469663
9.
 
Canon 40D APS-C 10.1 3888 2592none22.111.370364
10.
 
Canon 30D APS-C 8.2 3504 2336none21.510.873659
11.
 
Canon XT APS-C 8.0 3456 2304none21.810.863760
12.
 
Canon 10D APS-C 6.3 3072 2048none21.110.957157
13.
 
Canon Rebel APS-C 6.3 3072 2048none21.010.854455
14.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
15.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
16.
 
Nikon D200 APS-C 10.0 3872 2592none22.311.558364
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
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Many modern cameras are not only capable of taking still images, but can also record movies. The 645Z indeed provides for movie recording, while the 20D does not. The highest resolution format that the 645Z can use is 1080/60i.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The 20D 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 645Z offers a wider field of view (98%) than the one in the 20D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.56x), 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 20D and Pentax 645Z along with similar information for a selection of comparators.

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Core Features
# image 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 20Doptical Y1.8 / 118 fixed n 1/8000s 5.0/s Y n
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
3.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
5.
 
Canon 7D IIoptical Y3.0 / 1040 fixed n 1/8000s 10.0/s Y n
6.
 
Canon 60Doptical Y3.0 / 1040 swivel n 1/8000s 5.3/s Y n
7.
 
Canon 7Doptical Y3.0 / 920 fixed n 1/8000s 8.0/s Y n
8.
 
Canon 50Doptical Y3.0 / 920 fixed n 1/8000s 6.3/s Y n
9.
 
Canon 40Doptical Y3.0 / 230 fixed n 1/8000s 6.5/s Y n
10.
 
Canon 30Doptical Y2.5 / 230 fixed n 1/8000s 5.0/s Y n
11.
 
Canon XToptical n1.8 / 115 fixed n 1/4000s 3.0/s Y n
12.
 
Canon 10Doptical Y1.8 / 118 fixed n 1/4000s 3.0/s Y n
13.
 
Canon Rebeloptical n1.8 / 118 fixed n 1/4000s 2.5/s Y n
14.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3/s n n
15.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0/s n n
16.
 
Nikon D200optical Y2.5 / 230 fixed n 1/8000s 5.0/s Y n
17.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
padding

One difference between the cameras concerns the presence of an on-board flash. The 20D has one, while the 645Z does not. While the built-in flash of the 20D is not very powerful, it can at times be useful as a fill-in light.

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 20D writes its imaging data to Compact Flash cards, while the 645Z uses SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the 20D only has one slot.

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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 20D and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon 20DY- / ----1.1---
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 5DSYmono / monoY-mini3.0---
4.
 
Canon 5DS RYmono / monoY-mini3.0---
5.
 
Canon 7D IIYstereo / monoYYmini3.0---
6.
 
Canon 60DYmono / monoY-mini2.0---
7.
 
Canon 7DYmono / -Y-mini2.0---
8.
 
Canon 50DY- / ---mini2.0---
9.
 
Canon 40DY- / ----2.0---
10.
 
Canon 30DY- / ----2.0---
11.
 
Canon XTY- / ----2.0---
12.
 
Canon 10DY- / ----1.1---
13.
 
Canon RebelY- / ----1.1---
14.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
15.
 
Leica SLYstereo / monoYYfull3.0Y--
16.
 
Nikon D200Y- / ----2.0---
17.
 
Pentax 645DYstereo / ----2.0---
padding

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

Both the 20D and the 645Z have been discontinued, but can regularly be found used on ebay. The 20D was replaced by the Canon 30D, while the 645Z does not have a direct successor. Further information on the features and operation of the 20D and 645Z can be found, respectively, in the Canon 20D Manual (free pdf) or the online Pentax 645Z Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Canon 20D and the Pentax 645Z? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Canon EOS 20D:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 3 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (144x106mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 780g or 50 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (82 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2004).

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Advantages of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 8.2MP), which boosts linear resolution by 145%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (39 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (4.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (3.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.6 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • More complete view: Has a viewfinder with a larger field of view (98% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.56x).
  • Larger screen: Has a bigger rear LCD (3.2" vs 1.8") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 118k 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.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 1.1).
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More modern: Reflects 9 years and 7 months of technical progress since the 20D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the 645Z is the clear winner of the contest (17 : 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 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.

20D 08:17 645Z

How about other alternatives? Do the specifications of the Canon 20D 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 remains incomplete and does no justice, for example, to the way the 20D or the 645Z perform in practice. 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 following table reports the overall ratings of the cameras as published by some of the major 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 20D......+ +.... Aug 2004 1,499ebay.com
2.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499ebay.com
3.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 3,699ebay.com
4.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
5.
 
Canon 7D II4.5/5+3.5/584/1004/54.5/5 Sep 2014 1,799ebay.com
6.
 
Canon 60D5/5+..79/1004/54.5/5 Aug 2010 1,399ebay.com
7.
 
Canon 7D5/5+ +..84/1004.5/54.5/5 Sep 2009 1,699ebay.com
8.
 
Canon 50D..+ +..+ +4.5/54.5/5 Aug 2008 1,299ebay.com
9.
 
Canon 40D..+ +..+ +4.5/54.5/5 Aug 2007 1,299ebay.com
10.
 
Canon 30D..+ +..+ +o.. Feb 2006 1,399ebay.com
11.
 
Canon XT..80/100..+ +o.. Feb 2005 899ebay.com
12.
 
Canon 10D......+ +.... Feb 2003 1,999ebay.com
13.
 
Canon Rebel......+ +.... Aug 2003 899ebay.com
14.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 8,995ebay.com
15.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 7,450ebay.com
16.
 
Nikon D200..+ +..+ +o.. Nov 2005 1,699ebay.com
17.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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. 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Canon 20D 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.

    Camera Specifications
    Camera Model Canon 20D Pentax 645Z
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Canon EF mount lenses Pentax 645 mount lenses
    Launch Date August 2004 April 2014
    Launch Price USD 1,499 USD 8,499
    Sensor Specs Canon 20D Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 22.5 x 15.0 mm 43.8 x 32.8 mm
    Sensor Area 337.5 mm2 1436.64 mm2
    Sensor Diagonal 27 mm 54.7 mm
    Crop Factor 1.6x 0.79x
    Sensor Resolution 8.2 Megapixels 51.1 Megapixels
    Image Resolution 3504 x 2336 pixels 8256 x 6192 pixels
    Pixel Pitch 6.42 μm 5.30 μm
    Pixel Density 2.43 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 100 - 1,600 ISO 100 - 204,800 ISO
    ISO Boost 100 - 3,200 ISO no Enhancement
    Image Processor DIGIC 2 PRIME III
    DXO Sensor Quality (score) 62 101
    DXO Color Depth (bits) 21.9 26.0
    DXO Dynamic Range (EV) 11.0 14.7
    DXO Low Light (ISO) 721 4505
    Screen Specs Canon 20D Pentax 645Z
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 98%
    Viewfinder Magnification 0.56x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 1.8inch 3.2inch
    LCD Resolution 118k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Canon 20D Pentax 645Z
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/4000s
    Continuous Shooting 5 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy50 000 actuations100 000 actuations
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    Connectivity Specs Canon 20D Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 1.1 USB 3.0
    HDMI Port no HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support no Wifi no Wifi
    Body Specs Canon 20D Pentax 645Z
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Canon BP-511A Pentax D-LI90
    Battery Life (CIPA)700 shots per charge650 shots per charge
    Body Dimensions 144 x 106 x 72 mm
    (5.7 x 4.2 x 2.8 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 770 g (27.2 oz) 1550 g (54.7 oz)
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