Pentax 645D vs YI M1
The Pentax 645D and the YI M1 are two digital cameras that were announced, respectively, in March 2010 and September 2016. The 645D is a DSLR, while the M1 is a mirrorless interchangeable lens camera. The cameras are based on a medium format (645D) and a Four Thirds (M1) sensor. The Pentax has a resolution of 39.5 megapixels, whereas the YI provides 20.2 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 Pentax 645D and the YI M1? 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
An illustration of the physical size and weight of the Pentax 645D and the YI M1 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 width, height and depth dimensions are rounded to the nearest millimeter.
The M1 can be obtained in two different colors (black, silver), while the 645D 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 YI M1 is considerably smaller (60 percent) than the Pentax 645D. Moreover, the M1 is substantially lighter (81 percent) than the 645D. It is worth mentioning in this context that the 645D is splash and dust resistant, while the M1 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 645D gets 800 shots out of its Pentax D-LI90 battery, while the M1 can take 450 images on a single charge of its YI BXM-10 power pack. The power pack in the M1 can be charged via the USB port, which can be very convenient when travelling.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.
Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax 645D | 156 mm | 117 mm | 119 mm | 1480 g | 800 | Y | Mar 2010 | 9,995 | ebay.com | |
2. | YI M1 | 114 mm | 64 mm | 34 mm | 281 g | 450 | n | Sep 2016 | 349 | ebay.com | |
3. | Canon 1D Mark IV | 156 mm | 157 mm | 80 mm | 1230 g | 1500 | Y | Oct 2009 | 4,999 | ebay.com | |
4. | Canon 1D X | 158 mm | 168 mm | 83 mm | 1551 g | 1120 | Y | Oct 2011 | 6,799 | ebay.com | |
5. | Canon 1D X Mark II | 158 mm | 168 mm | 83 mm | 1530 g | 1210 | Y | Feb 2016 | 5,999 | ebay.com | |
6. | Canon SX730 | 110 mm | 64 mm | 40 mm | 300 g | 250 | n | Apr 2017 | 399 | ebay.com | |
7. | Fujifilm X-A3 | 117 mm | 67 mm | 40 mm | 339 g | 410 | n | Aug 2016 | 399 | ebay.com | |
8. | Leica S Typ 006 | 160 mm | 120 mm | 80 mm | 1260 g | .. | Y | Sep 2012 | 21,950 | ebay.com | |
9. | Nikon 1 J5 | 98 mm | 60 mm | 32 mm | 231 g | 250 | n | Apr 2015 | 399 | ebay.com | |
10. | Nikon D3S | 160 mm | 157 mm | 88 mm | 1240 g | 4200 | Y | Oct 2009 | 5,199 | ebay.com | |
11. | Nikon D5 | 160 mm | 159 mm | 92 mm | 1415 g | 3780 | Y | Jan 2016 | 6,499 | ebay.com | |
12. | Nikon D810 | 146 mm | 123 mm | 82 mm | 980 g | 1200 | Y | Jun 2014 | 3,299 | ebay.com | |
13. | Nikon D850 | 146 mm | 124 mm | 79 mm | 1005 g | 1840 | Y | Jul 2017 | 3,299 | amazon.com | |
14. | Panasonic GF7 | 107 mm | 65 mm | 33 mm | 266 g | 230 | n | Jan 2015 | 499 | ebay.com | |
15. | Panasonic GX850 | 107 mm | 65 mm | 33 mm | 269 g | 210 | n | Jan 2017 | 549 | ebay.com | |
16. | Pentax 645Z | 156 mm | 117 mm | 123 mm | 1550 g | 650 | Y | Apr 2014 | 8,499 | ebay.com | |
17. | Sony A7R | 127 mm | 94 mm | 48 mm | 465 g | 340 | Y | Oct 2013 | 2,299 | ebay.com | |
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
The price is, of course, an important factor in any camera decision. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The M1 was launched at a markedly lower price (by 97 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.
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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Pentax 645D features a medium format sensor and the YI M1 a Four Thirds sensor. The sensor area in the M1 is 85 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 2.0. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.
With 39.5MP, the 645D offers a higher resolution than the M1 (20.2MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.34μm for the M1) due to its larger sensor. However, the M1 is a much more recent model (by 6 years and 6 months) than the 645D, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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 YI M1 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.
The Pentax 645D has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the YI M1 are ISO 100 to ISO 25600 (no boost).
In terms of underlying technology, the 645D is build around a CCD sensor, while the M1 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax 645D | Medium Format | 39.5 | 7264 | 5440 | none | 24.6 | 12.6 | 1262 | 82 | |
2. | YI M1 | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.0 | 12.6 | 1030 | 73 | |
3. | Canon 1D Mark IV | APS-H | 16.0 | 4896 | 3264 | 1080/30p | 22.8 | 12.0 | 1320 | 74 | |
4. | Canon 1D X | Full Frame | 17.9 | 5184 | 3456 | 1080/30p | 23.8 | 11.8 | 2786 | 82 | |
5. | Canon 1D X Mark II | Full Frame | 20.0 | 5472 | 3648 | 4K/60p | 24.1 | 13.5 | 3207 | 88 | |
6. | Canon SX730 | 1/2.3 | 20.2 | 5184 | 3888 | 1080/60p | 20.5 | 11.9 | 924 | 50 | |
7. | Fujifilm X-A3 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 23.8 | 13.1 | 1664 | 81 | |
8. | Leica S Typ 006 | Medium Format | 37.5 | 7500 | 5000 | none | 23.9 | 12.2 | 824 | 76 | |
9. | Nikon 1 J5 | 1-inch | 20.7 | 5568 | 3712 | 4K/15p | 21.1 | 12.0 | 479 | 65 | |
10. | Nikon D3S | Full Frame | 12.1 | 4256 | 2832 | 720/24p | 23.5 | 12.0 | 3253 | 82 | |
11. | Nikon D5 | Full Frame | 20.7 | 5588 | 3712 | 4K/30p | 25.1 | 12.3 | 2343 | 88 | |
12. | Nikon D810 | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.7 | 14.8 | 2853 | 97 | |
13. | Nikon D850 | Full Frame | 45.4 | 8256 | 5504 | 4K/30p | 26.4 | 14.8 | 2660 | 100 | |
14. | Panasonic GF7 | Four Thirds | 15.8 | 4592 | 3448 | 1080/60p | 22.7 | 12.3 | 874 | 70 | |
15. | Panasonic GX850 | Four Thirds | 15.8 | 4592 | 3448 | 4K/30p | 23.2 | 13.3 | 586 | 73 | |
16. | Pentax 645Z | Medium Format | 51.1 | 8256 | 6192 | 1080/60i | 26.0 | 14.7 | 4505 | 101 | |
17. | Sony A7R | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.6 | 14.1 | 2746 | 95 | |
Note: DXO values in italics represent estimates based on sensor size and age. |
Many modern cameras cannot only take still pictures, but also record videos. The M1 indeed provides for movie recording, while the 645D does not. The highest resolution format that the M1 can use is 4K/30p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. For example, the 645D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the M1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Pentax 645D and YI M1 along with similar information for a selection of comparators.
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. | Pentax 645D | optical | Y | 3.0 / 921 | fixed | n | 1/4000s | 1.1/s | n | n | |
2. | YI M1 | none | n | 3.0 / 1040 | fixed | Y | 1/4000s | 5.0/s | n | n | |
3. | Canon 1D Mark IV | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 10.0/s | n | n | |
4. | Canon 1D X | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 14.0/s | n | n | |
5. | Canon 1D X Mark II | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 16.0/s | n | n | |
6. | Canon SX730 | none | n | 3.0 / 922 | tilting | n | 1/3200s | 5.9/s | Y | Y | |
7. | Fujifilm X-A3 | none | n | 3.0 / 1040 | tilting | Y | 1/4000s | 6.0/s | Y | n | |
8. | Leica S Typ 006 | optical | Y | 3.0 / 922 | fixed | n | 1/4000s | 1.5/s | n | n | |
9. | Nikon 1 J5 | none | n | 3.0 / 1037 | tilting | Y | 1/4000s | 60.0/s | Y | n | |
10. | Nikon D3S | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 11.0/s | n | n | |
11. | Nikon D5 | optical | Y | 3.2 / 2359 | fixed | Y | 1/8000s | 14.0/s | n | n | |
12. | Nikon D810 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 5.0/s | Y | n | |
13. | Nikon D850 | optical | Y | 3.2 / 2359 | tilting | Y | 1/8000s | 9.0/s | n | n | |
14. | Panasonic GF7 | none | n | 3.0 / 1040 | tilting | Y | 1/500s | 5.8/s | Y | n | |
15. | Panasonic GX850 | none | n | 3.0 / 1040 | tilting | Y | 1/500s | 10.0/s | Y | n | |
16. | Pentax 645Z | optical | Y | 3.2 / 1037 | tilting | n | 1/4000s | 3.0/s | n | n | |
17. | Sony A7R | 2400 | n | 3.0 / 1230 | tilting | n | 1/8000s | 4.0/s | n | n | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that is present on the 645D, but is missing on the M1 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 Pentax 645D and the YI M1 both have 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 645D and the M1 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 M1 only has one slot.
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 Pentax 645D and YI M1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax 645D | Y | stereo / - | - | - | - | 2.0 | - | - | - | |
2. | YI M1 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | Y | |
3. | Canon 1D Mark IV | Y | stereo / - | Y | - | mini | 2.0 | - | - | - | |
4. | Canon 1D X | Y | mono / - | Y | - | mini | 2.0 | - | - | - | |
5. | Canon 1D X Mark II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
6. | Canon SX730 | - | stereo / mono | - | - | micro | 2.0 | Y | Y | Y | |
7. | Fujifilm X-A3 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
8. | Leica S Typ 006 | Y | - / - | - | - | mini | 2.0 | - | - | - | |
9. | Nikon 1 J5 | - | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
10. | Nikon D3S | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
11. | Nikon D5 | Y | stereo / mono | Y | Y | mini | 3.0 | - | - | - | |
12. | Nikon D810 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | - | - | |
13. | Nikon D850 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | Y | Y | |
14. | Panasonic GF7 | - | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
15. | Panasonic GX850 | - | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
16. | Pentax 645Z | Y | stereo / mono | Y | - | mini | 3.0 | - | - | - | |
17. | Sony A7R | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - |
It is notable that the M1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 645D does not provide wifi capability.
Studio photographers will appreciate that the Pentax 645D (unlike the M1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 645D and the M1 have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the M1 does not have a direct successor. Further information on the features and operation of the 645D and M1 can be found, respectively, in the Pentax 645D Manual (free pdf) or the online YI M1 Manual.
Review summary
So what conclusions can be drawn? Is there a clear favorite between the Pentax 645D and the YI M1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Arguments in favor of the Pentax 645D:
- More detail: Offers more megapixels (39.5 vs 20.2MP) with a 40% higher linear resolution.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Longer lasting: Can take more shots (800 versus 450) 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 March 2010).
Advantages of the YI M1:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Faster burst: Shoots at higher frequency (5 vs 1.1 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (114x64mm vs 156x117mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 1199g or 81 percent) and is thus easier to take along.
- Easier travel charging: Can be conveniently charged via its USB port.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- 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.
- More affordable: Was introduced into a lower priced category (97 percent cheaper at launch).
- More modern: Reflects 6 years and 6 months of technical progress since the 645D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the M1 is the clear winner of the contest (13 : 9 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 Pentax 645D and the YI M1 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 says little about, for example, the shooting experience and imaging performance of the 645D and the M1 in practical situations. 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 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.
Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax 645D | 5/5 | .. | .. | .. | .. | .. | Mar 2010 | 9,995 | ebay.com | |
2. | YI M1 | .. | .. | .. | 69/100 | .. | .. | Sep 2016 | 349 | ebay.com | |
3. | Canon 1D Mark IV | 5/5 | .. | .. | 89/100 | .. | .. | Oct 2009 | 4,999 | ebay.com | |
4. | Canon 1D X | 5/5 | .. | .. | .. | 4.5/5 | 4.5/5 | Oct 2011 | 6,799 | ebay.com | |
5. | Canon 1D X Mark II | .. | .. | 4.5/5 | 89/100 | 4.5/5 | 4.5/5 | Feb 2016 | 5,999 | ebay.com | |
6. | Canon SX730 | .. | + | .. | .. | 4/5 | 4/5 | Apr 2017 | 399 | ebay.com | |
7. | Fujifilm X-A3 | .. | .. | .. | 74/100 | 4.5/5 | 4/5 | Aug 2016 | 399 | ebay.com | |
8. | Leica S Typ 006 | .. | .. | .. | .. | .. | .. | Sep 2012 | 21,950 | ebay.com | |
9. | Nikon 1 J5 | .. | .. | .. | .. | 4.5/5 | 4.5/5 | Apr 2015 | 399 | ebay.com | |
10. | Nikon D3S | 5/5 | .. | .. | 89/100 | 4.5/5 | 5/5 | Oct 2009 | 5,199 | ebay.com | |
11. | Nikon D5 | .. | .. | 4/5 | 89/100 | 4.5/5 | 5/5 | Jan 2016 | 6,499 | ebay.com | |
12. | Nikon D810 | 5/5 | .. | 5/5 | 86/100 | 5/5 | 4.5/5 | Jun 2014 | 3,299 | ebay.com | |
13. | Nikon D850 | 4.5/5 | + + | 5/5 | 89/100 | 4.5/5 | 5/5 | Jul 2017 | 3,299 | amazon.com | |
14. | Panasonic GF7 | 4/5 | + | .. | .. | 4.5/5 | 4.5/5 | Jan 2015 | 499 | ebay.com | |
15. | Panasonic GX850 | .. | + | .. | 76/100 | 4.5/5 | 4.5/5 | Jan 2017 | 549 | ebay.com | |
16. | Pentax 645Z | 5/5 | .. | 3.5/5 | .. | 4.5/5 | 5/5 | Apr 2014 | 8,499 | ebay.com | |
17. | Sony A7R | 5/5 | + + | .. | 82/100 | 4.5/5 | 5/5 | Oct 2013 | 2,299 | ebay.com | |
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. |
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. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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 make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
Specifications: Pentax 645D vs YI M1
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 | Pentax 645D | YI M1 |
---|---|---|
Camera Type | Digital single lens reflex | Mirrorless system camera |
Camera Lens | Pentax 645 mount lenses | Micro Four Thirds lenses |
Launch Date | March 2010 | September 2016 |
Launch Price | USD 9,995 | USD 349 |
Sensor Specs | Pentax 645D | YI M1 |
Sensor Technology | CCD | CMOS |
Sensor Format | Medium Format Sensor | Four Thirds Sensor |
Sensor Size | 44.0 x 33.0 mm | 17.3 x 13.0 mm |
Sensor Area | 1452 mm2 | 224.9 mm2 |
Sensor Diagonal | 55 mm | 21.6 mm |
Crop Factor | 0.79x | 2.0x |
Sensor Resolution | 39.5 Megapixels | 20.2 Megapixels |
Image Resolution | 7264 x 5440 pixels | 5184 x 3888 pixels |
Pixel Pitch | 6.06 μm | 3.34 μm |
Pixel Density | 2.72 MP/cm2 | 8.96 MP/cm2 |
Moiré control | no AA filter | Anti-Alias filter |
Movie Capability | no Video | 4K/30p Video |
ISO Setting | 100 - 1,600 ISO | 100 - 25,600 ISO |
DXO Sensor Quality (score) | 82 | .. |
DXO Color Depth (bits) | 24.6 | .. |
DXO Dynamic Range (EV) | 12.6 | .. |
DXO Low Light (ISO) | 1262 | .. |
Screen Specs | Pentax 645D | YI M1 |
Viewfinder Type | Optical viewfinder | no viewfinder |
Viewfinder Field of View | 98% | |
Viewfinder Magnification | 0.78x | |
Top-Level Screen | Control Panel | no Top Display |
LCD Framing | Live View | |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 921k dots | 1040k dots |
LCD Attachment | Fixed screen | Fixed screen |
Touch Input | no Touchscreen | Touchscreen |
Shooting Specs | Pentax 645D | YI M1 |
Focus System | Phase-detect AF | Contrast-detect AF |
Manual Focusing Aid | no Peaking Feature | Focus Peaking |
Max Shutter Speed (mechanical) | 1/4000s | 1/4000s |
Continuous Shooting | 1.1 shutter flaps/s | 5 shutter flaps/s |
Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
Fill Flash | no On-Board Flash | no On-Board Flash |
Storage Medium | SDXC cards | SDXC cards |
Single or Dual Card Slots | Dual card slots | Single card slot |
UHS card support | no | no |
Connectivity Specs | Pentax 645D | YI M1 |
External Flash | Hotshoe | Hotshoe |
Studio Flash | PC Sync socket | no PC Sync |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | no HDMI | micro HDMI |
Wifi Support | no Wifi | Wifi built-in |
Bluetooth Support | no Bluetooth | Bluetooth built-in |
Body Specs | Pentax 645D | YI M1 |
Environmental Sealing | Weathersealed body | not weather sealed |
Battery Type | Pentax D-LI90 | YI BXM-10 |
Battery Life (CIPA) | 800 shots per charge | 450 shots per charge |
In-Camera Charging | no USB charging | USB charging |
Body Dimensions |
156 x 117 x 119 mm (6.1 x 4.6 x 4.7 in) |
114 x 64 x 34 mm (4.5 x 2.5 x 1.3 in) |
Camera Weight | 1480 g (52.2 oz) | 281 g (9.9 oz) |
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