Canon 600D vs Pentax 645D
The Canon EOS 600D (called Canon T3i in some regions) and the Pentax 645D are two digital cameras that were officially introduced, respectively, in February 2011 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (600D) and a medium format (645D) sensor. The Canon has a resolution of 17.9 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 600D 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 600D 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 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 645D is notably larger (37 percent) than the Canon 600D. Moreover, the 645D is substantially heavier (160 percent) than the 600D. It is noteworthy in this context that the 645D is splash and dust-proof, while the 600D 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. 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.
|1.||Canon 600D||133 mm||100 mm||80 mm||570 g||440||n||Feb 2011||599|
|2.||Pentax 645D||156 mm||117 mm||119 mm||1480 g||800||Y||Mar 2010||9,995|
|3.||Canon 77D||131 mm||100 mm||76 mm||540 g||600||n||Feb 2017||899|
|4.||Canon 760D||132 mm||101 mm||78 mm||565 g||440||n||Feb 2015||649|
|5.||Canon 1200D||130 mm||100 mm||78 mm||480 g||500||n||Feb 2014||449|
|6.||Canon 100D||117 mm||91 mm||69 mm||407 g||380||n||Mar 2013||549|
|7.||Canon 700D||133 mm||100 mm||79 mm||580 g||440||n||Mar 2013||649|
|8.||Canon 650D||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849|
|9.||Canon M||109 mm||66 mm||32 mm||298 g||230||n||Jul 2012||599|
|10.||Canon 1D X||158 mm||168 mm||83 mm||1551 g||1120||Y||Oct 2011||6,799|
|11.||Canon 1100D||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449|
|12.||Canon 550D||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|13.||Canon 1D Mark IV||156 mm||157 mm||80 mm||1230 g||1500||Y||Oct 2009||4,999|
|14.||Canon 500D||129 mm||98 mm||62 mm||520 g||400||n||Mar 2009||799|
|15.||Leica S Typ 006||160 mm||120 mm||80 mm||1260 g||..||Y||Sep 2012||21,950|
|16.||Nikon D3S||160 mm||157 mm||88 mm||1240 g||4200||Y||Oct 2009||5,199|
|17.||Pentax 645Z||156 mm||117 mm||123 mm||1550 g||650||Y||Apr 2014||8,499|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or 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 600D was launched at a markedly lower price (by 94 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.
The size of the imaging sensor is a crucial determinant 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 600D features an APS-C sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 337 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 600D 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 600D (17.9MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 4.31μm for the 600D) due to its larger sensor. However, the 600D is a somewhat more recent model (by 10 months) than the 645D, and its sensor might 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 inches or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inches or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inches or 61.5 x 46.1 cm. The corresponding values for the Canon 600D are 25.9 x 17.3 inches or 65.8 x 43.9 cm for good quality, 20.7 x 13.8 inches or 52.7 x 35.1 cm for very good quality, and 17.3 x 11.5 inches or 43.9 x 29.3 cm for excellent quality prints.
The Canon EOS 600D has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-12800. 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 600D (overall score 17 points higher). The advantage is based on 2.5 bits higher color depth, 1.1 EV in additional dynamic range, and 0.7 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.
|2.||Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
|10.||Canon 1D X||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82|
|13.||Canon 1D Mark IV||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74|
|15.||Leica S Typ 006||Medium Format||37.5||7500||5000||none||23.9||12.2||824||76|
|16.||Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82|
|17.||Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
Many modern cameras cannot only take still pictures, but also record videos. The 600D indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the 600D can use is 1080/30p.
Apart from body and sensor, cameras can and do differ across a range of features. The 600D 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 600D (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 0.53x), 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 600D and Pentax 645D in connection with corresponding information for a sample of similar cameras.
|1.||Canon 600D||optical||n||3.0 / 1040||swivel||n||1/4000s||3.7||Y||n|
|2.||Pentax 645D||optical||Y||3.0 / 921||fixed||n||1/4000s||1.1||n||n|
|3.||Canon 77D||optical||Y||3.0 / 1040||swivel||Y||1/4000s||6.0||Y||n|
|4.||Canon 760D||optical||Y||3.0 / 1040||swivel||Y||1/4000s||5.0||Y||n|
|5.||Canon 1200D||optical||n||3.0 / 460||fixed||n||1/4000s||3.0||Y||n|
|6.||Canon 100D||optical||n||3.0 / 1040||fixed||Y||1/4000s||4.9||Y||n|
|7.||Canon 700D||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0||Y||n|
|8.||Canon 650D||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0||Y||n|
|9.||Canon M||none||n||3.0 / 1040||fixed||Y||1/4000s||4.3||n||n|
|10.||Canon 1D X||optical||Y||3.2 / 1040||fixed||n||1/8000s||14.0||n||n|
|11.||Canon 1100D||optical||n||2.7 / 230||fixed||n||1/4000s||3.0||Y||n|
|12.||Canon 550D||optical||n||3.0 / 1040||fixed||n||1/4000s||3.7||Y||n|
|13.||Canon 1D Mark IV||optical||Y||3.0 / 920||fixed||n||1/8000s||10.0||n||n|
|14.||Canon 500D||optical||n||3.0 / 920||fixed||n||1/4000s||3.4||Y||n|
|15.||Leica S Typ 006||optical||Y||3.0 / 922||fixed||n||1/4000s||1.5||n||n|
|16.||Nikon D3S||optical||Y||3.0 / 921||fixed||n||1/8000s||11.0||n||n|
|17.||Pentax 645Z||optical||Y||3.2 / 1037||tilting||n||1/4000s||3.0||n||n|
One difference between the cameras concerns the presence of an on-board flash. The 600D has one, while the 645D does not. While the built-in flash of the 600D is not very powerful, it can at times be useful as a fill-in light.The 600D has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the 645D does not have a selfie-screen.
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.
Concerning the storage of imaging data, both the 600D and the 645D write their files to SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the 600D 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 600D and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon 600D||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|2.||Pentax 645D||Y||stereo / -||-||-||-||2.0||-||-||-|
|3.||Canon 77D||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|4.||Canon 760D||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|5.||Canon 1200D||Y||mono / mono||-||-||mini||2.0||-||-||-|
|6.||Canon 100D||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|7.||Canon 700D||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|8.||Canon 650D||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|9.||Canon M||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|10.||Canon 1D X||Y||mono / -||Y||-||mini||2.0||-||-||-|
|11.||Canon 1100D||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|12.||Canon 550D||Y||stereo / -||Y||-||mini||2.0||-||-||-|
|13.||Canon 1D Mark IV||Y||stereo / -||Y||-||mini||2.0||-||-||-|
|14.||Canon 500D||Y||mono / mono||-||-||mini||2.0||-||-||-|
|15.||Leica S Typ 006||Y||- / -||-||-||mini||2.0||-||-||-|
|16.||Nikon D3S||Y||stereo / -||-||-||mini||2.0||-||-||-|
|17.||Pentax 645Z||Y||stereo / mono||Y||-||mini||3.0||-||-||-|
Studio photographers will appreciate that the Pentax 645D (unlike the 600D) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 600D and the 645D have been discontinued, but can regularly be found used on eBay. The 645D was replaced by the Pentax 645Z, while the 600D was followed by the Canon 650D. 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? Is there a clear favorite between the Canon 600D and the Pentax 645D? Which camera is better? The listing below highlights the relative strengths of the two models.
Advantages of the Canon EOS 600D:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Broader imaging potential: Can record not only still images but also 1080/30p movies.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (3.7 vs 1.1 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (133x100mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 910g or 61 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 (94 percent cheaper at launch).
- More modern: Is somewhat more recent (announced 10 months after the 645D).
Reasons to prefer the Pentax 645D:
- More detail: Has more megapixels (39.5 vs 17.9MP), which boosts linear resolution by 46%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (17 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.5 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.7 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 0.53x).
- Easier setting verification: Features a control panel on top to check shooting parameters.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Gets more shots (800 versus 440) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- 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 on the market for longer (launched in March 2010).
If the count of individual advantages (bullet points above) is taken as a guide, the 645D is the clear winner of the contest (15 : 11 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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 600D 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the 600D or the 645D 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.
This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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.
|1.||Canon 600D||3/5||o||..||77/100||4.5/5||4.5/5||Feb 2011||599|
|2.||Pentax 645D||5/5||..||..||..||..||..||Mar 2010||9,995|
|3.||Canon 77D||4.5/5||..||4/5||82/100||4.5/5||4/5||Feb 2017||899|
|4.||Canon 760D||5/5||+||..||77/100||4.5/5||4.5/5||Feb 2015||649|
|5.||Canon 1200D||3/5||+||..||..||4/5||4.5/5||Feb 2014||449|
|6.||Canon 100D||4/5||+||..||78/100||4/5||4/5||Mar 2013||549|
|7.||Canon 700D||..||..||..||76/100||4.5/5||4.5/5||Mar 2013||649|
|8.||Canon 650D||4/5||+ +||..||77/100||4.5/5||4.5/5||Jun 2012||849|
|9.||Canon M||3/5||+||..||..||4/5||4/5||Jul 2012||599|
|10.||Canon 1D X||5/5||..||..||..||4.5/5||4.5/5||Oct 2011||6,799|
|11.||Canon 1100D||..||80/100||..||69/100||4/5||4.5/5||Feb 2011||449|
|12.||Canon 550D||..||+ +||..||77/100||4/5||4.5/5||Feb 2010||699|
|13.||Canon 1D Mark IV||5/5||..||..||89/100||..||..||Oct 2009||4,999|
|14.||Canon 500D||..||+ +||..||74/100||4.5/5||4.5/5||Mar 2009||799|
|15.||Leica S Typ 006||..||..||..||..||..||..||Sep 2012||21,950|
|16.||Nikon D3S||5/5||..||..||89/100||4.5/5||5/5||Oct 2009||5,199|
|17.||Pentax 645Z||5/5||..||..||..||4.5/5||5/5||Apr 2014||8,499|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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 are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 600D vs Leica M Typ 240
- Canon 600D vs Leica V-LUX Typ 114
- Canon 600D vs Panasonic LX100 II
- Canon 600D vs Panasonic S5
- Canon 600D vs Sony RX10 III
- Canon 600D vs Zeiss ZX1
- Canon XS vs Pentax 645D
- Hasselblad X1D vs Pentax 645D
- Leica TL vs Pentax 645D
- Olympus E-P2 vs Pentax 645D
- Panasonic S1 vs Pentax 645D
- Pentax 645D vs Ricoh WG-60
Specifications: Canon 600D 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 600D||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 2011||March 2010|
|Launch Price||USD 599||USD 9,995|
|Sensor Specs||Canon 600D||Pentax 645D|
|Sensor Format||APS-C Sensor||Medium Format Sensor|
|Sensor Size||22.3 x 14.9 mm||44.0 x 33.0 mm|
|Sensor Area||332.27 mm2||1452 mm2|
|Sensor Diagonal||26.8 mm||55 mm|
|Sensor Resolution||17.9 Megapixels||39.5 Megapixels|
|Image Resolution||5184 x 3456 pixels||7264 x 5440 pixels|
|Pixel Pitch||4.31 μm||6.06 μm|
|Pixel Density||5.39 MP/cm2||2.72 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/30p Video||no Video|
|ISO Setting||100 - 6,400 ISO||100 - 1,600 ISO|
|ISO Boost||100 - 12,800 ISO||no Enhancement|
|Image Processor||DIGIC 4||PRIME II|
|DXO Sensor Quality (score)||65||82|
|DXO Color Depth (bits)||22.1||24.6|
|DXO Dynamic Range (EV)||11.5||12.6|
|DXO Low Light (ISO)||793||1262|
|Screen Specs||Canon 600D||Pentax 645D|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||98%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||921k dots|
|LCD Attachment||Swivel screen||Fixed screen|
|Shooting Specs||Canon 600D||Pentax 645D|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||3.7 shutter flaps/s||1.1 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||50 000 actuations|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Built-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||no||no|
|Connectivity Specs||Canon 600D||Pentax 645D|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||no HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 600D||Pentax 645D|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||440 shots per charge||800 shots per charge|
133 x 100 x 80 mm
(5.2 x 3.9 x 3.1 in)
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
|Camera Weight||570 g (20.1 oz)||1480 g (52.2 oz)|
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