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Pentax 645D vs Pentax Q

The Pentax 645D and the Pentax Q are two digital cameras that were revealed to the public, respectively, in March 2010 and June 2011. The 645D is a DSLR, while the Pentax Q is a mirrorless interchangeable lens camera. The cameras are based on a medium format (645D) and a 1/2.3-inch (Pentax Q) sensor. The 645D has a resolution of 39.5 megapixels, whereas the Pentax Q provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Pentax 645D   Pentax Q
Pentax 645D Pentax Q
Digital single lens reflex Mirrorless system camera
Pentax 645 mount lenses Pentax Q mount lenses
39.5 MP, Medium Format Sensor 12 MP, 1/2.3" Sensor
no Video 1080/30p Video
ISO 100-1600 ISO 125-6400
Optical viewfinder Viewfinder optional
3.0" LCD, 921k dots 3.0" LCD, 460k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
1.1 shutter flaps per second 1.5 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyNot weather sealed
800 shots per battery charge230 shots per battery charge
156 x 117 x 119 mm, 1480 g 98 x 57 x 31 mm, 180 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645D and the Pentax Q? 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 Pentax Q 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 width, height and depth measures are rounded to the nearest millimeter.

The Pentax Q can be obtained in two different colors (black, white), while the 645D is only available in black.

Size Pentax 645D vs Pentax Q
Compare 645D versus Pentax Q top
Comparison 645D or Pentax Q rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax Q is considerably smaller (69 percent) than the Pentax 645D. Moreover, the Pentax Q is substantially lighter (88 percent) than the 645D. It is worth mentioning in this context that the 645D is splash and dust resistant, while the Pentax Q 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 would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Pentax 645D» 6.1 in 4.6 in 4.7 in 52.2 oz 800 Y Mar 2010 9,995- i Pentax 645D
 
Pentax Q« 3.9 in 2.2 in 1.2 in 6.3 oz 230 n Jun 2011 649- i Pentax Q
 
Canon 1D X Mark II« » 6.2 in 6.6 in 3.3 in 54.0 oz 1210 Y Feb 2016 5,999 i i Canon 1D X Mark II
 
Canon 1D X« » 6.2 in 6.6 in 3.3 in 54.7 oz 1120 Y Oct 2011 6,799- i 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- i Canon 1D Mark IV
 
Leica S Typ 006« » 6.3 in 4.7 in 3.1 in 44.4 oz .. Y Sep 2012 21,950- i Leica S Typ 006
 
Nikon D850« » 5.7 in 4.9 in 3.1 in 35.5 oz 1840 Y Jul 2017 3,299 i i Nikon D850
 
Nikon D5« » 6.3 in 6.3 in 3.6 in 49.9 oz 3780 Y Jan 2016 6,499 i i Nikon D5
 
Nikon D810« » 5.7 in 4.8 in 3.2 in 34.6 oz 1200 Y Jun 2014 3,299- i Nikon D810
 
Nikon D3S« » 6.3 in 6.2 in 3.5 in 43.7 oz 4200 Y Oct 2009 5,199- i Nikon D3S
 
Olympus XZ-2« » 4.4 in 2.6 in 1.9 in 12.2 oz 340 n Sep 2012 599- i Olympus XZ-2
 
Olympus E-PL2« » 4.5 in 2.8 in 1.7 in 12.8 oz 280 n Jan 2011 599- i Olympus E-PL2
 
Olympus E-PL3« » 4.3 in 2.5 in 1.5 in 11.0 oz 300 n Jun 2011 599- i Olympus E-PL3
 
Olympus E-PL1« » 4.5 in 2.8 in 1.7 in 11.8 oz 290 n Feb 2010 599- i Olympus E-PL1
 
Olympus E-620« » 5.1 in 3.7 in 2.4 in 18.4 oz 500 n Feb 2009 699- i Olympus E-620
 
Pentax 645Z« » 6.1 in 4.6 in 4.8 in 54.7 oz 650 Y Apr 2014 8,499 i i Pentax 645Z
 
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i Sony A7R
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The Pentax Q was launched at a markedly lower price (by 94 percent) than the 645D, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Pentax 645D features a medium format sensor and the Pentax Q a 1/2.3-inch sensor. The sensor area in the Pentax Q is 98 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 5.6. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Pentax 645D and Pentax Q sensor measures

With 39.5MP, the 645D offers a higher resolution than the Pentax Q (12MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 1.53μm for the Pentax Q) due to its larger sensor. However, the Pentax Q is a somewhat more recent model (by 1 year and 3 months) than the 645D, and its sensor might have benefitted from technological advances during this time that 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 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 Pentax Q are 20 x 15 inch or 50.8 x 38.1 cm for good quality, 16 x 12 inch or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inch or 33.9 x 25.4 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 Pentax Q are ISO 125 to ISO 6400 (no boost).

645D versus Pentax Q MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). Of the two cameras under review, the 645D provides substantially higher image quality than the Pentax Q, with an overall score that is 35 points higher. This advantage is based on 4.4 bits higher color depth, 1.5 EV in additional dynamic range, and 2.7 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Pentax 645D» Medium Format 39.5 7264 5440-24.612.6126282Pentax 645D
 
Pentax Q« 1/2.3 12.0 4000 30001080/30p20.211.118947Pentax Q
 
Canon 1D X Mark II« » Full Frame 20.0 5472 36484K/60p24.113.5320788Canon 1D X Mark II
 
Canon 1D X« » Full Frame 17.9 5184 34561080/30p23.811.8278682Canon 1D X
 
Canon 1D Mark IV« » APS-H 16.0 4896 32641080/30p22.812.0132074Canon 1D Mark IV
 
Leica S Typ 006« » Medium Format 37.5 7500 5000-23.912.282476Leica S Typ 006
 
Nikon D850« » Full Frame 45.4 8256 55044K/30p26.414.82660100Nikon D850
 
Nikon D5« » Full Frame 20.7 5588 37124K/30p25.112.3234388Nikon D5
 
Nikon D810« » Full Frame 36.2 7360 49121080/60p25.714.8285397Nikon D810
 
Nikon D3S« » Full Frame 12.1 4256 2832720/24p23.512.0325382Nikon D3S
 
Olympus XZ-2« » 1/1.7 11.8 3968 29761080/30p20.411.321649Olympus XZ-2
 
Olympus E-PL2« » Four Thirds 12.2 4032 3024720/30p21.410.257355Olympus E-PL2
 
Olympus E-PL3« » Four Thirds 12.2 4032 30241080/60i20.910.349952Olympus E-PL3
 
Olympus E-PL1« » Four Thirds 12.2 4032 3024720/30p21.510.148754Olympus E-PL1
 
Olympus E-620« » Four Thirds 12.2 4032 3024-21.310.353655Olympus E-620
 
Pentax 645Z« » Medium Format 51.1 8256 61921080/60i26.014.74505101Pentax 645Z
 
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R

Many modern cameras are not only capable of taking still images, but can also record movies. The Pentax Q indeed provides for movie recording, while the 645D does not. The highest resolution format that the Pentax Q can use is 1080/30p.

 

Feature comparison

Beyond 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 Pentax Q relies on live view and the rear LCD for framing. That said, the Pentax Q can be equipped with an optional viewfinder – the O-VF1. The following table reports on some other key feature differences and similarities of the Pentax 645D, the Pentax Q, and comparable cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Pentax 645D»optical Y 3.0 921 fixed n 1/4000s 1.1 n n Pentax 645D
 
Pentax Q«- n 3.0 460 fixed n 1/2000s 1.5 Y Y Pentax Q
 
Canon 1D X Mark II« »optical Y 3.2 1620 fixed Y 1/8000s 16.0 n n Canon 1D X Mark II
 
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
 
Leica S Typ 006« »optical Y 3.0 922 fixed n 1/4000s 1.5 n n Leica S Typ 006
 
Nikon D850« »optical Y 3.2 2359 tilting Y 1/8000s 9.0 n n Nikon D850
 
Nikon D5« »optical Y 3.2 2359 fixed Y 1/8000s 14.0 n n Nikon D5
 
Nikon D810« »optical Y 3.2 1229 fixed n 1/8000s 5.0 Y n Nikon D810
 
Nikon D3S« »optical Y 3.0 921 fixed n 1/8000s 11.0 n n Nikon D3S
 
Olympus XZ-2« »- n 3.0 920 tilting Y 1/2000s 5.0 Y Y Olympus XZ-2
 
Olympus E-PL2« »- n 3.0 460 fixed n 1/4000s 3.0 Y Y Olympus E-PL2
 
Olympus E-PL3« »- n 3.0 460 tilting n 1/4000s 5.5 n Y Olympus E-PL3
 
Olympus E-PL1« »- n 2.7 230 fixed n 1/2000s 3.0 Y Y Olympus E-PL1
 
Olympus E-620« »optical n 2.7 230 swivel n 1/4000s 4.0 Y Y Olympus E-620
 
Pentax 645Z« »optical Y 3.2 1037 tilting n 1/4000s 3.0 n n Pentax 645Z
 
Sony A7R« »2400 n 3.0 1230 tilting n 1/8000s 4.0 n n Sony A7R

One feature that is present on the 645D, but is missing on the Pentax Q 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 Pentax Q 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 Pentax Q 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 Pentax Q 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 Pentax Q and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Pentax 645D»Ystereo----2.0---Pentax 645D
 
Pentax Q«Ymonomono--mini2.0---Pentax Q
 
Canon 1D X Mark II« »YmonomonoYYmini3.0---Canon 1D X Mark II
 
Canon 1D X« »Ymono-Y-mini2.0---Canon 1D X
 
Canon 1D Mark IV« »Ystereo-Y-mini2.0---Canon 1D Mark IV
 
Leica S Typ 006« »Y----mini2.0---Leica S Typ 006
 
Nikon D850« »YstereomonoYYmini3.0YYYNikon D850
 
Nikon D5« »YstereomonoYYmini3.0---Nikon D5
 
Nikon D810« »YstereomonoYYmini3.0Y--Nikon D810
 
Nikon D3S« »Ystereo---mini2.0---Nikon D3S
 
Olympus XZ-2« »Ystereomono--mini2.0---Olympus XZ-2
 
Olympus E-PL2« »Ystereo---mini2.0---Olympus E-PL2
 
Olympus E-PL3« »Ystereo---mini2.0---Olympus E-PL3
 
Olympus E-PL1« »Ystereo---mini2.0---Olympus E-PL1
 
Olympus E-620« »Y-----2.0---Olympus E-620
 
Pentax 645Z« »YstereomonoY-mini3.0---Pentax 645Z
 
Sony A7R« »YstereomonoYYmicro2.0YY-Sony A7R

Studio photographers will appreciate that the Pentax 645D (unlike the Pentax Q) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 645D and the Pentax Q have been discontinued, but can regularly be found used on eBay. The 645D was replaced by the Pentax 645Z, while the Pentax Q was followed by the Pentax Q10. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax website.


Review summary

So how do things add up? Which of the two cameras – the Pentax 645D or the Pentax Q – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Pentax 645D:

  • More detail: Offers more megapixels (39.5 vs 12MP) with a 82% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (35 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (4.4 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (1.5 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (2.7 stops ISO advantage).
  • 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.
  • More detailed LCD: Has a higher resolution rear screen (921k vs 460k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
  • Longer lasting: Can take more shots (800 versus 230) 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 on the market for longer (launched in March 2010).


Reasons to prefer the Pentax Q:

  • 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 1080/30p video.
  • Faster burst: Shoots at higher frequency (1.5 vs 1.1 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (98x57mm vs 156x117mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 1300g or 88 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • 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.
  • More affordable: Was introduced into a lower priced category (94 percent cheaper at launch).
  • More modern: Was introduced somewhat (1 year and 3 months) more recently.

If the count of individual advantages (bullet points above) is taken as a guide, the 645D is the clear winner of the match-up (15 : 10 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

645D 15:10 Pentax Q

How about other alternatives? Do the specifications of the Pentax 645D and the Pentax Q 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 645D or the Pentax Q. 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 where reviews by experts come in. 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Pentax 645D»---4.5/5- Mar 2010 9,995- i Pentax 645D
 
Pentax Q«--4/53.5/53.5/5 Jun 2011 649- i Pentax Q
 
Canon 1D X Mark II« »-89/1004.5/55/54.5/5 Feb 2016 5,999 i i Canon 1D X Mark II
 
Canon 1D X« »--4.5/54.5/54.5/5 Oct 2011 6,799- i Canon 1D X
 
Canon 1D Mark IV« »-89/100-5/5- Oct 2009 4,999- i Canon 1D Mark IV
 
Leica S Typ 006« »----- Sep 2012 21,950- i Leica S Typ 006
 
Nikon D850« »+ +89/1004.5/55/55/5 Jul 2017 3,299 i i Nikon D850
 
Nikon D5« »-89/1004.5/55/55/5 Jan 2016 6,499 i i Nikon D5
 
Nikon D810« »-86/1005/54.5/54.5/5 Jun 2014 3,299- i Nikon D810
 
Nikon D3S« »-89/1004.5/55/55/5 Oct 2009 5,199- i Nikon D3S
 
Olympus XZ-2« »+-4.5/54/54.5/5 Sep 2012 599- i Olympus XZ-2
 
Olympus E-PL2« »83/10071/1004.5/54.5/54.5/5 Jan 2011 599- i Olympus E-PL2
 
Olympus E-PL3« »+ +72/1004.5/5-4/5 Jun 2011 599- i Olympus E-PL3
 
Olympus E-PL1« »86/10069/1004/54.5/54.5/5 Feb 2010 599- i Olympus E-PL1
 
Olympus E-620« »88/10072/1004.5/5o5/5 Feb 2009 699- i Olympus E-620
 
Pentax 645Z« »--4.5/55/55/5 Apr 2014 8,499 i i Pentax 645Z
 
Sony A7R« »+ +82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Pentax 645D:
Check Ebay offers
Pentax Q:
Check Ebay offers

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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Pentax 645D vs Pentax Q

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Pentax 645D Pentax Q
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Pentax 645 mount lenses Pentax Q mount lenses
    Launch Date March 2010 June 2011
    Launch Price USD 9995 USD 649
    Sensor Specs Pentax 645D Pentax Q
    Sensor Technology CCD CMOS
    Sensor Format Medium Format Sensor 1/2.3" Sensor
    Sensor Size 44.0 x 33.0 mm 6.17 x 4.55 mm
    Sensor Area 1452 mm2 28.0735 mm2
    Sensor Diagonal 55 mm 7.7 mm
    Crop Factor 0.79x 5.6x
    Sensor Resolution 39.5 Megapixels 12 Megapixels
    Image Resolution 7264 x 5440 pixels 4000 x 3000 pixels
    Pixel Pitch 6.06 μm 1.53 μm
    Pixel Density 2.72 MP/cm2 42.74 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability no Video 1080/30p Video
    ISO Setting 100-1600 ISO 125-6400 ISO
    DXO Sensor Quality (score) 82 47
    DXO Color Depth (bits) 24.6 20.2
    DXO Dynamic Range (EV) 12.6 11.1
    DXO Low Light (ISO) 1262 189
    Screen Specs Pentax 645D Pentax Q
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 98%
    Viewfinder Magnification 0.78x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 921k dots 460k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Pentax 645D Pentax Q
    Autofocus System Phase-detect AF Contrast-detect AF
    Continuous Shooting 1.1 shutter flaps/s 1.5 shutter flaps/s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash Build-in Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Dual card slots Single card slot
    UHS card support no no
    Connectivity Specs Pentax 645D Pentax Q
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Pentax 645D Pentax Q
    Environmental SealingWeathersealed bodyNot weather sealed
    Battery Type D-LI90 D-LI68
    Battery Life (CIPA)800 shots per charge230 shots per charge
    Body Dimensions 156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    98 x 57 x 31 mm
    (3.9 x 2.2 x 1.2 in)
    Camera Weight 1480 g (52.2 oz) 180 g (6.3 oz)

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