Pentax 645D vs Samsung NX30
The Pentax 645D and the Samsung NX30 are two digital cameras that were announced, respectively, in March 2010 and January 2014. The 645D is a DSLR, while the NX30 is a mirrorless interchangeable lens camera. The cameras are based on a medium format (645D) and an APS-C (NX30) sensor. The Pentax has a resolution of 39.5 megapixels, whereas the Samsung provides 20 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check 645D offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645D and the Samsung NX30? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
Body comparison
The side-by-side display below illustrates the physical size and weight of the Pentax 645D and the Samsung NX30. 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.



If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Samsung NX30 is considerably smaller (33 percent) than the Pentax 645D. Moreover, the NX30 is substantially lighter (75 percent) than the 645D. It is worth mentioning in this context that the 645D is splash and dust resistant, while the NX30 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 power pack in the NX30 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 |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Pentax 645D | 156 mm | 117 mm | 119 mm | 1480 g | 800 | Y | Mar 2010 | US$ 9 995 | ebay.com | |
| 2. | Samsung NX30 | 127 mm | 96 mm | 58 mm | 375 g | 360 | n | Jan 2014 | US$ 999 | ebay.com | |
| 3. | Canon 1D Mark IV | 156 mm | 157 mm | 80 mm | 1230 g | 1500 | Y | Oct 2009 | US$ 4 999 | ebay.com | |
| 4. | Canon 1D X | 158 mm | 168 mm | 83 mm | 1551 g | 1120 | Y | Oct 2011 | US$ 6 799 | ebay.com | |
| 5. | Canon 1D X Mark II | 158 mm | 168 mm | 83 mm | 1530 g | 1210 | Y | Feb 2016 | US$ 5 999 | ebay.com | |
| 6. | Leica S Typ 006 | 160 mm | 120 mm | 80 mm | 1260 g | .. | Y | Sep 2012 | US$ 21 949 | ebay.com | |
| 7. | Nikon D3S | 160 mm | 157 mm | 88 mm | 1240 g | 4200 | Y | Oct 2009 | US$ 5 199 | ebay.com | |
| 8. | Nikon D5 | 160 mm | 159 mm | 92 mm | 1415 g | 3780 | Y | Jan 2016 | US$ 6 499 | ebay.com | |
| 9. | Nikon D810 | 146 mm | 123 mm | 82 mm | 980 g | 1200 | Y | Jun 2014 | US$ 3 299 | ebay.com | |
| 10. | Nikon D850 | 146 mm | 124 mm | 79 mm | 1005 g | 1840 | Y | Jul 2017 | US$ 3 299 | amazon.com | |
| 11. | Nikon D3300 | 124 mm | 98 mm | 76 mm | 430 g | 700 | n | Jan 2014 | US$ 499 | ebay.com | |
| 12. | Nikon D5500 | 124 mm | 97 mm | 70 mm | 470 g | 820 | n | Jan 2015 | US$ 899 | ebay.com | |
| 13. | Pentax 645Z | 156 mm | 117 mm | 123 mm | 1550 g | 650 | Y | Apr 2014 | US$ 8 499 | ebay.com | |
| 14. | Sony A7R | 127 mm | 94 mm | 48 mm | 465 g | 340 | Y | Oct 2013 | US$ 2 299 | ebay.com | |
| 15. | Sony A3000 | 128 mm | 91 mm | 85 mm | 411 g | 470 | n | Aug 2013 | US$ 329 | ebay.com | |
| 16. | Sony A6000 | 120 mm | 67 mm | 45 mm | 344 g | 360 | n | Feb 2014 | US$ 599 | ebay.com | |
| 17. | Sony A6400 | 120 mm | 67 mm | 50 mm | 403 g | 410 | Y | Jan 2019 | US$ 899 | amazon.com | |
| Note: 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 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 NX30 was launched at a markedly lower price (by 90 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. 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 Samsung NX30 an APS-C sensor. The sensor area in the NX30 is 75 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 1.5. The sensor in the 645D has a native 4:3 aspect ratio, while the one in the NX30 offers a 3:2 aspect.

With 39.5MP, the 645D offers a higher resolution than the NX30 (20MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 4.30μm for the NX30) due to its larger sensor. However, the NX30 is a much more recent model (by 3 years and 9 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 neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the 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 Samsung NX30 are 27.4 x 18.2 inches or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inches or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inches or 46.3 x 30.9 cm for excellent quality prints.
The NX30 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Pentax 645D has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Samsung NX30 are ISO 100 to ISO 25600 (no boost).
In terms of underlying technology, the 645D is build around a CCD sensor, while the NX30 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 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 review, the 645D has a notably higher overall DXO score than the NX30 (overall score 6 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 0.2 EV in additional dynamic range, and 0.3 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

| 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. | Samsung NX30 | APS-C | 20.0 | 5472 | 3648 | 1080/60p | 23.5 | 12.4 | 1014 | 76 | |
| 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. | Leica S Typ 006 | Medium Format | 37.5 | 7500 | 5000 | none | 23.9 | 12.2 | 824 | 76 | |
| 7. | Nikon D3S | Full Frame | 12.1 | 4256 | 2832 | 720/24p | 23.5 | 12.0 | 3253 | 82 | |
| 8. | Nikon D5 | Full Frame | 20.7 | 5588 | 3712 | 4K/30p | 25.1 | 12.3 | 2343 | 88 | |
| 9. | Nikon D810 | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.7 | 14.8 | 2853 | 97 | |
| 10. | Nikon D850 | Full Frame | 45.4 | 8256 | 5504 | 4K/30p | 26.4 | 14.8 | 2660 | 100 | |
| 11. | Nikon D3300 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.3 | 12.8 | 1385 | 82 | |
| 12. | Nikon D5500 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.1 | 14.0 | 1438 | 84 | |
| 13. | Pentax 645Z | Medium Format | 51.1 | 8256 | 6192 | 1080/60i | 26.0 | 14.7 | 4505 | 101 | |
| 14. | Sony A7R | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.6 | 14.1 | 2746 | 95 | |
| 15. | Sony A3000 | APS-C | 19.8 | 5456 | 3632 | 1080/60i | 23.7 | 12.8 | 1068 | 78 | |
| 16. | Sony A6000 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.1 | 13.1 | 1347 | 82 | |
| 17. | Sony A6400 | APS-C | 24.0 | 6000 | 4000 | 4K/30p | 24.0 | 13.6 | 1431 | 83 |
Many modern cameras are not only capable of taking still images, but can also record movies. The NX30 indeed provides for movie recording, while the 645D does not. The highest resolution format that the NX30 can use is 1080/60p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. For example, the NX30 has an electronic viewfinder (2359k dots), while the 645D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the NX30 offers a wider field of view (100%) than the one in the 645D (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645D has a higher magnification (0.78x vs 0.64x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Pentax 645D, the Samsung NX30, and comparable cameras.

| 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. | Samsung NX30 | 2359 | n | 3.0 / 1036 | swivel | Y | 1/8000s | 9.0/s | Y | 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. | Leica S Typ 006 | optical | Y | 3.0 / 922 | fixed | n | 1/4000s | 1.5/s | n | n | |
| 7. | Nikon D3S | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 11.0/s | n | n | |
| 8. | Nikon D5 | optical | Y | 3.2 / 2359 | fixed | Y | 1/8000s | 14.0/s | n | n | |
| 9. | Nikon D810 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 5.0/s | Y | n | |
| 10. | Nikon D850 | optical | Y | 3.2 / 2359 | tilting | Y | 1/8000s | 9.0/s | n | n | |
| 11. | Nikon D3300 | optical | n | 3.0 / 921 | fixed | n | 1/4000s | 5.0/s | Y | n | |
| 12. | Nikon D5500 | optical | n | 3.2 / 1037 | swivel | Y | 1/4000s | 5.0/s | Y | n | |
| 13. | Pentax 645Z | optical | Y | 3.2 / 1037 | tilting | n | 1/4000s | 3.0/s | n | n | |
| 14. | Sony A7R | 2400 | n | 3.0 / 1230 | tilting | n | 1/8000s | 4.0/s | n | n | |
| 15. | Sony A3000 | 202 | n | 3.0 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
| 16. | Sony A6000 | 1440 | n | 3.0 / 922 | tilting | n | 1/4000s | 11.0/s | Y | n | |
| 17. | Sony A6400 | 2359 | n | 3.0 / 922 | tilting | Y | 1/4000s | 11.0/s | Y | 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 NX30 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 NX30 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 645D does not have a selfie-screen.The Pentax 645D and the Samsung NX30 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 NX30 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 NX30 only has one slot. The NX30 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 645D cannot take advantage of Ultra High Speed SD cards.
Connectivity comparison
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Pentax 645D and Samsung NX30 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. | Samsung NX30 | 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. | Leica S Typ 006 | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 7. | Nikon D3S | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
| 8. | Nikon D5 | Y | stereo / mono | Y | Y | mini | 3.0 | - | - | - | |
| 9. | Nikon D810 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | - | - | |
| 10. | Nikon D850 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | Y | Y | |
| 11. | Nikon D3300 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
| 12. | Nikon D5500 | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
| 13. | Pentax 645Z | Y | stereo / mono | Y | - | mini | 3.0 | - | - | - | |
| 14. | Sony A7R | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
| 15. | Sony A3000 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 16. | Sony A6000 | Y | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
| 17. | Sony A6400 | Y | stereo / mono | Y | - | micro | 2.0 | Y | Y | Y |
It is notable that the NX30 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 NX30) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 645D and the NX30 have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the NX30 does not have a direct successor. Further information on the features and operation of the 645D and NX30 can be found, respectively, in the Pentax 645D Manual (free pdf) or the online Samsung NX30 Manual.
Review summary
So how do things add up? Is the Pentax 645D better than the Samsung NX30 or vice versa? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Pentax 645D:
- More detail: Offers more megapixels (39.5 vs 20MP) with a 38% higher linear resolution.
- Better image quality: Scores markedly higher (6 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.64x).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Longer lasting: Can take more shots (800 versus 360) 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).

Reasons to prefer the Samsung NX30:
- Broader imaging potential: Can capture not only stills but also 1080/60p video.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
- More detailed LCD: Has a higher resolution rear screen (1036k vs 921k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (9 vs 1.1 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (127x96mm vs 156x117mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 1105g or 75 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 fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced into a lower priced category (90 percent cheaper at launch).
- More modern: Reflects 3 years and 9 months of technical progress since the 645D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the NX30 is the clear winner of the contest (20 : 11 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 Pentax 645D and the Samsung NX30 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 NX30 in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
Expert reviews
This is why expert reviews 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.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Pentax 645D | 5/5 | .. | .. | .. | .. | .. | Mar 2010 | US$ 9 995 | ebay.com | |
| 2. | Samsung NX30 | 3/5 | .. | .. | 77/100 | 4.5/5 | 4.5/5 | Jan 2014 | US$ 999 | ebay.com | |
| 3. | Canon 1D Mark IV | 5/5 | .. | .. | 89/100 | .. | .. | Oct 2009 | US$ 4 999 | ebay.com | |
| 4. | Canon 1D X | 5/5 | .. | .. | .. | 4.5/5 | 4.5/5 | Oct 2011 | US$ 6 799 | ebay.com | |
| 5. | Canon 1D X Mark II | .. | .. | 4.5/5 | 89/100 | 4.5/5 | 4.5/5 | Feb 2016 | US$ 5 999 | ebay.com | |
| 6. | Leica S Typ 006 | .. | .. | .. | .. | .. | .. | Sep 2012 | US$ 21 949 | ebay.com | |
| 7. | Nikon D3S | 5/5 | .. | .. | 89/100 | 4.5/5 | 5/5 | Oct 2009 | US$ 5 199 | ebay.com | |
| 8. | Nikon D5 | .. | .. | 4/5 | 89/100 | 4.5/5 | 5/5 | Jan 2016 | US$ 6 499 | ebay.com | |
| 9. | Nikon D810 | 5/5 | .. | 5/5 | 86/100 | 5/5 | 4.5/5 | Jun 2014 | US$ 3 299 | ebay.com | |
| 10. | Nikon D850 | 4.5/5 | + + | 5/5 | 89/100 | 4.5/5 | 5/5 | Jul 2017 | US$ 3 299 | amazon.com | |
| 11. | Nikon D3300 | 3/5 | + | .. | 77/100 | 4.5/5 | 4.5/5 | Jan 2014 | US$ 499 | ebay.com | |
| 12. | Nikon D5500 | 5/5 | + | .. | 79/100 | 4.5/5 | 4.5/5 | Jan 2015 | US$ 899 | ebay.com | |
| 13. | Pentax 645Z | 5/5 | .. | 3.5/5 | .. | 4.5/5 | 5/5 | Apr 2014 | US$ 8 499 | ebay.com | |
| 14. | Sony A7R | 5/5 | + + | .. | 82/100 | 4.5/5 | 5/5 | Oct 2013 | US$ 2 299 | ebay.com | |
| 15. | Sony A3000 | 3/5 | + | .. | .. | 4/5 | 4/5 | Aug 2013 | US$ 329 | ebay.com | |
| 16. | Sony A6000 | 5/5 | + | 4.5/5 | 80/100 | 4.5/5 | 5/5 | Feb 2014 | US$ 599 | ebay.com | |
| 17. | Sony A6400 | 4/5 | + | 4/5 | 85/100 | 4.5/5 | 4/5 | Jan 2019 | US$ 899 | amazon.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

Check 645D offers at
ebay.com

Check NX30 offers at
ebay.com
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 your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon R10 vs Samsung NX30
- Canon XT vs Samsung NX30
- Fujifilm X-A1 vs Pentax 645D
- Fujifilm X-A10 vs Pentax 645D
- Fujifilm X100V vs Samsung NX30
- Leica M10-P vs Samsung NX30
- Nikon D3X vs Samsung NX30
- Olympus E-420 vs Pentax 645D
- Panasonic ZS80 vs Pentax 645D
- Pentax 645D vs Sony A7C II
- Pentax 645D vs Sony A7R IV
- Samsung NX30 vs Sony NEX-5
Specifications: Pentax 645D vs Samsung NX30
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 | Samsung NX30 |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Pentax 645 mount lenses | Samsung NX mount lenses |
| Launch Date | March 2010 | January 2014 |
| Launch Price | USD 9,995 | USD 999 |
| Sensor Specs | Pentax 645D | Samsung NX30 |
| Sensor Technology | CCD | CMOS |
| Sensor Format | Medium Format Sensor | APS-C Sensor |
| Sensor Size | 44.0 x 33.0 mm | 23.5 x 15.7 mm |
| Sensor Area | 1452 mm2 | 368.95 mm2 |
| Sensor Diagonal | 55 mm | 28.3 mm |
| Crop Factor | 0.79x | 1.5x |
| Sensor Resolution | 39.5 Megapixels | 20 Megapixels |
| Image Resolution | 7264 x 5440 pixels | 5472 x 3648 pixels |
| Pixel Pitch | 6.06 μm | 4.30 μm |
| Pixel Density | 2.72 MP/cm2 | 5.41 MP/cm2 |
| Moiré control | no AA filter | no AA filter |
| Movie Capability | no Video | 1080/60p Video |
| ISO Setting | 100 - 1,600 ISO | 100 - 25,600 ISO |
| Image Processor | PRIME II | DRIMe IV |
| DXO Sensor Quality (score) | 82 | 76 |
| DXO Color Depth (bits) | 24.6 | 23.5 |
| DXO Dynamic Range (EV) | 12.6 | 12.4 |
| DXO Low Light (ISO) | 1262 | 1014 |
| Screen Specs | Pentax 645D | Samsung NX30 |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 98% | 100% |
| Viewfinder Magnification | 0.78x | 0.64x |
| Viewfinder Resolution | 2359k dots | |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | |
| Rear LCD Size | 3.0inch | 3.0inch |
| LCD Resolution | 921k dots | 1036k dots |
| LCD Attachment | Fixed screen | Swivel screen |
| Touch Input | no Touchscreen | Touchscreen |
| Shooting Specs | Pentax 645D | Samsung NX30 |
| Focus System | Phase-detect AF | On-Sensor Phase-detect |
| Manual Focusing Aid | no Peaking Feature | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/4000s | 1/8000s |
| Continuous Shooting | 1.1 shutter flaps/s | 9 shutter flaps/s |
| Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
| Fill Flash | no On-Board Flash | Built-in Flash |
| Storage Medium | SDXC cards | SDXC cards |
| Single or Dual Card Slots | Dual card slots | Single card slot |
| UHS card support | no | UHS-I |
| Connectivity Specs | Pentax 645D | Samsung NX30 |
| 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 |
| Near-Field Communication | no NFC | NFC built-in |
| Body Specs | Pentax 645D | Samsung NX30 |
| Environmental Sealing | Weathersealed body | not weather sealed |
| Battery Type | Pentax D-LI90 | Samsung BP1410 |
| Battery Life (CIPA) | 800 shots per charge | 360 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) |
127 x 96 x 58 mm (5.0 x 3.8 x 2.3 in) |
| Camera Weight | 1480 g (52.2 oz) | 375 g (13.2 oz) |

Check 645D offers at
ebay.com

Check NX30 offers at
ebay.com
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