Canon 10D vs Pentax 645D
The Canon EOS 10D and the Pentax 645D are two digital cameras that were officially introduced, respectively, in February 2003 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (10D) and a medium format (645D) sensor. The Canon has a resolution of 6.3 megapixels, whereas the Pentax provides 39.5 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 10D||Pentax 645D|
|Digital single lens reflex||Digital single lens reflex|
|Canon EF mount lenses||Pentax 645 mount lenses|
|6.3 MP, APS-C Sensor||39.5 MP, Medium Format Sensor|
|no Video||no Video|
|ISO 100-3200||ISO 100-1600|
|Optical viewfinder||Optical viewfinder|
|1.8" LCD, 118k dots||3.0" LCD, 921k dots|
|Fixed screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|3 shutter flaps per second||1.1 shutter flaps per second|
|Not weather sealed||Weathersealed body|
|500 shots per battery charge||800 shots per battery charge|
|150 x 107 x 75 mm, 850 g||156 x 117 x 119 mm, 1480 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 10D and the Pentax 645D? 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.
An illustration of the physical size and weight of the Canon 10D and the Pentax 645D is provided 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 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 645D is notably larger (14 percent) than the Canon 10D. Moreover, the 645D is substantially heavier (74 percent) than the 10D. It is noteworthy in this context that the 645D is splash and dust-proof, while the 10D 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.
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.
|Canon 10D»||5.9 in||4.2 in||3.0 in||30.0 oz||500||n||Feb 2003||1,999||Canon 10D|
|Pentax 645D«||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995||Pentax 645D|
|Canon T5« »||5.1 in||3.9 in||3.1 in||16.9 oz||500||n||Feb 2014||449||Canon T5|
|Canon SL1« »||4.6 in||3.6 in||2.7 in||14.4 oz||380||n||Mar 2013||549||Canon SL1|
|Canon T4i« »||5.2 in||3.9 in||3.1 in||20.3 oz||440||n||Jun 2012||849||Canon T4i|
|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 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|
|Canon 7D« »||5.8 in||4.4 in||2.9 in||30.3 oz||800||Y||Sep 2009||1,699||Canon 7D|
|Canon 40D« »||5.7 in||4.3 in||2.9 in||29.0 oz||750||n||Aug 2007||1,299||Canon 40D|
|Canon 30D« »||5.7 in||4.2 in||2.9 in||27.7 oz||750||n||Feb 2006||1,399||Canon 30D|
|Canon 20D« »||5.7 in||4.2 in||2.8 in||27.2 oz||700||n||Aug 2004||1,499||Canon 20D|
|Canon Rebel« »||5.6 in||3.9 in||2.8 in||22.9 oz||400||n||Aug 2003||899||Canon Rebel|
|Canon D60« »||5.9 in||4.2 in||3.0 in||30.2 oz||620||n||Feb 2002||2,999||Canon D60|
|Leica S Typ 006« »||6.3 in||4.7 in||3.1 in||44.4 oz||..||Y||Sep 2012||21,950||Leica S Typ 006|
|Nikon D3S« »||6.3 in||6.2 in||3.5 in||43.7 oz||4200||Y||Oct 2009||5,199||Nikon D3S|
|Nikon D100« »||5.7 in||4.6 in||3.2 in||27.5 oz||370||n||Feb 2002||1,999||Nikon D100|
|Pentax 645Z« »||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499||Pentax 645Z|
|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 10D was launched at a markedly lower price (by 80 percent) than the 645D, 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.
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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon 10D features an APS-C sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 323 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 10D has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.
With 39.5MP, the 645D offers a higher resolution than the 10D (6.3MP), but the 645D has smaller individual pixels (pixel pitch of 6.06μm versus 7.38μm for the 10D). Yet, the 645D is a much more recent model (by 7 years) than the 10D, 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 645D has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Pentax 645D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645D for good quality output (200 dots per inch) amounts to 36.3 x 27.2 inch or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inch or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inch or 61.5 x 46.1 cm. The corresponding values for the Canon 10D are 15.4 x 10.2 inch or 39 x 26 cm for good quality, 12.3 x 8.2 inch or 31.2 x 20.8 cm for very good quality, and 10.2 x 6.8 inch or 26 x 17.3 cm for excellent quality prints.
The Canon EOS 10D has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (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 645D offers substantially better image quality than the 10D (overall score 25 points higher). The advantage is based on 3.5 bits higher color depth, 1.7 EV in additional dynamic range, and 1.1 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.
|Canon 10D||APS-C||6.3||3072||2048||none||21.1||10.9||571||57||Canon 10D|
|Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82||Pentax 645D|
|Canon T5||APS-C||17.9||5184||3456||1080/30p||21.9||11.3||724||63||Canon T5|
|Canon SL1||APS-C||17.9||5184||3456||1080/30p||21.8||11.3||843||63||Canon SL1|
|Canon T4i||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||722||62||Canon T4i|
|Canon 1D X||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82||Canon 1D X|
|Canon 1D Mark IV||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74||Canon 1D Mark IV|
|Canon 7D||APS-C||17.9||5184||3456||1080/30p||22.0||11.7||854||66||Canon 7D|
|Canon 40D||APS-C||10.1||3888||2592||none||22.1||11.3||703||64||Canon 40D|
|Canon 30D||APS-C||8.2||3504||2336||none||21.5||10.8||736||59||Canon 30D|
|Canon 20D||APS-C||8.2||3504||2336||none||21.9||11.0||721||62||Canon 20D|
|Canon Rebel||APS-C||6.3||3072||2048||none||21.0||10.8||544||55||Canon Rebel|
|Canon D60||APS-C||6.3||3072||2048||none||..||..||..||..||Canon D60|
|Leica S Typ 006||Medium Format||37.5||7500||5000||none||23.9||12.2||824||76||Leica S Typ 006|
|Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82||Nikon D3S|
|Nikon D100||APS-C||6.0||3008||2000||none||..||..||..||..||Nikon D100|
|Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101||Pentax 645Z|
Beyond body and sensor, cameras can and do differ across a range of features. The 10D and the 645D 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 645D offers a wider field of view (98%) than the one in the 10D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 645D has a higher magnification (0.78x vs 0.55x), 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 10D and Pentax 645D in connection with corresponding information for a sample of similar cameras.
|Canon 10D||optical||Y||1.8||118||fixed||n||1/4000s||3.0||Y||n||Canon 10D|
|Pentax 645D||optical||Y||3.0||921||fixed||n||1/4000s||1.1||n||n||Pentax 645D|
|Canon T5||optical||n||3.0||460||fixed||n||1/4000s||3.0||Y||n||Canon T5|
|Canon SL1||optical||n||3.0||1040||fixed||Y||1/4000s||4.9||Y||n||Canon SL1|
|Canon T4i||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T4i|
|Canon 1D X||optical||Y||3.2||1040||fixed||n||1/8000s||14.0||n||n||Canon 1D X|
|Canon 1D Mark IV||optical||Y||3.0||920||fixed||n||1/8000s||10.0||n||n||Canon 1D Mark IV|
|Canon 7D||optical||Y||3.0||920||fixed||n||1/8000s||8.0||Y||n||Canon 7D|
|Canon 40D||optical||Y||3.0||230||fixed||n||1/8000s||6.5||Y||n||Canon 40D|
|Canon 30D||optical||Y||2.5||230||fixed||n||1/8000s||5.0||Y||n||Canon 30D|
|Canon 20D||optical||Y||1.8||118||fixed||n||1/8000s||5.0||Y||n||Canon 20D|
|Canon Rebel||optical||n||1.8||118||fixed||n||1/4000s||2.5||Y||n||Canon Rebel|
|Canon D60||optical||Y||1.8||114||fixed||n||1/4000s||3.0||Y||n||Canon D60|
|Leica S Typ 006||optical||Y||3.0||922||fixed||n||1/4000s||1.5||n||n||Leica S Typ 006|
|Nikon D3S||optical||Y||3.0||921||fixed||n||1/8000s||11.0||n||n||Nikon D3S|
|Nikon D100||optical||Y||1.8||118||fixed||n||1/4000s||3.0||Y||n||Nikon D100|
|Pentax 645Z||optical||Y||3.2||1037||tilting||n||1/4000s||3.0||n||n||Pentax 645Z|
One difference between the cameras concerns the presence of an on-board flash. The 10D has one, while the 645D does not. While the built-in flash of the 10D is not very powerful, it can at times be useful as a fill-in light.
The Pentax 645D 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 10D writes its imaging data to Compact Flash cards, while the 645D uses SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the 10D only has one slot.
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 10D and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 10D||Y||none||none||-||-||none||1.1||-||-||-||Canon 10D|
|Pentax 645D||Y||stereo||none||-||-||none||2.0||-||-||-||Pentax 645D|
|Canon T5||Y||mono||mono||-||-||mini||2.0||-||-||-||Canon T5|
|Canon SL1||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon SL1|
|Canon T4i||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon T4i|
|Canon 1D X||Y||mono||none||Y||-||mini||2.0||-||-||-||Canon 1D X|
|Canon 1D Mark IV||Y||stereo||none||Y||-||mini||2.0||-||-||-||Canon 1D Mark IV|
|Canon 7D||Y||mono||none||Y||-||mini||2.0||-||-||-||Canon 7D|
|Canon 40D||Y||none||none||-||-||none||2.0||-||-||-||Canon 40D|
|Canon 30D||Y||none||none||-||-||none||2.0||-||-||-||Canon 30D|
|Canon 20D||Y||none||none||-||-||none||1.1||-||-||-||Canon 20D|
|Canon Rebel||Y||none||none||-||-||none||1.1||-||-||-||Canon Rebel|
|Canon D60||Y||none||none||-||-||none||1.1||-||-||-||Canon D60|
|Leica S Typ 006||Y||none||none||-||-||mini||2.0||-||-||-||Leica S Typ 006|
|Nikon D3S||Y||stereo||none||-||-||mini||2.0||-||-||-||Nikon D3S|
|Nikon D100||Y||none||none||-||-||none||1.1||-||-||-||Nikon D100|
|Pentax 645Z||Y||stereo||mono||Y||-||mini||3.0||-||-||-||Pentax 645Z|
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
Both the 10D and the 645D have been discontinued, but can regularly be found used on eBay. The 10D was replaced by the Canon 20D, while the 645D was followed by the Pentax 645Z. 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.
So what is the bottom line? Which of the two cameras – the Canon 10D or the Pentax 645D – 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 10D:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Faster burst: Shoots at higher frequency (3 vs 1.1 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (150x107mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 630g or 43 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 (80 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in February 2003).
Advantages of the Pentax 645D:
- More detail: Has more megapixels (39.5 vs 6.3MP), which boosts linear resolution by 146%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (25 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (3.5 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1.1 stops ISO advantage).
- 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 0.55x).
- Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (921k vs 118k dots).
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Gets more shots (800 versus 500) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More modern: Reflects 7 years of technical progress since the 10D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the 645D is the clear winner of the contest (16 : 7 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 10D and the Pentax 645D 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 10D or the 645D perform in practice. 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.
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.
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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.
- Canon 10D vs Canon 1Ds
- Canon 10D vs Fujifilm GFX 50S
- Canon 10D vs Panasonic G6
- Canon 10D vs Panasonic GX1
- Canon 10D vs Panasonic ZS70
- Canon 10D vs Sony A5100
- Canon 10D vs Sony A7S II
- Leica D-LUX Typ 109 vs Pentax 645D
- Nikon D3500 vs Pentax 645D
- Panasonic FZ80 vs Pentax 645D
- Pentax 645D vs Sony A77 II
- Pentax 645D vs Sony RX100 V
Specifications: Canon 10D vs Pentax 645D
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 Model||Canon 10D||Pentax 645D|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Pentax 645 mount lenses|
|Launch Date||February 2003||March 2010|
|Launch Price||USD 1999||USD 9995|
|Sensor Specs||Canon 10D||Pentax 645D|
|Sensor Format||APS-C Sensor||Medium Format Sensor|
|Sensor Size||22.7 x 15.1 mm||44.0 x 33.0 mm|
|Sensor Area||342.77 mm2||1452 mm2|
|Sensor Diagonal||27.3 mm||55 mm|
|Sensor Resolution||6.3 Megapixels||39.5 Megapixels|
|Image Resolution||3072 x 2048 pixels||7264 x 5440 pixels|
|Pixel Pitch||7.38 μm||6.06 μm|
|Pixel Density||1.84 MP/cm2||2.72 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||no Video|
|ISO Setting||100-3200 ISO||100-1600 ISO|
|Image Processor||DIGIC||PRIME II|
|DXO Sensor Quality (score)||57||82|
|DXO Color Depth (bits)||21.1||24.6|
|DXO Dynamic Range (EV)||10.9||12.6|
|DXO Low Light (ISO)||571||1262|
|Screen Specs||Canon 10D||Pentax 645D|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||98%|
|Top-Level Screen||Control Panel||Control Panel|
|Rear LCD Size||1.8 inch||3.0 inch|
|LCD Resolution||118k dots||921k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon 10D||Pentax 645D|
|Autofocus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||3 shutter flaps/s||1.1 shutter flaps/s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||CF cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|Connectivity Specs||Canon 10D||Pentax 645D|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||USB 1.1||USB 2.0|
|HDMI Port||no HDMI||no HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 10D||Pentax 645D|
|Environmental Sealing||Not weather sealed||Weathersealed body|
|Battery Life (CIPA)||500 shots per charge||800 shots per charge|
150 x 107 x 75 mm
(5.9 x 4.2 x 3.0 in)
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
|Camera Weight||850 g (30.0 oz)||1480 g (52.2 oz)|
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