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Nikon D850 vs Pentax 645D

The Nikon D850 and the Pentax 645D are two professional cameras that were announced, respectively, in July 2017 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D850) and a medium format (645D) sensor. The Nikon has a resolution of 45.4 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.

Headline Specifications
Nikon D850
versus
Pentax 645D
Nikon D850   Pentax 645D
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
45.4 MP – Full Frame sensor 39.5 MP – Medium Format sensor
4K/30p Video no Video
ISO 64-25,600 (32 - 102,400) ISO 100-1,600
Optical viewfinder Optical viewfinder
3.2" LCD – 2359k dots 3.0" LCD – 921k dots
Tilting touchscreen Fixed screen (not touch-sensitive)
9 shutter flaps per second 1.1 shutter flaps per second
Weathersealed bodyWeathersealed body
1840 shots per battery charge800 shots per battery charge
146 x 124 x 79 mm, 1005 g 156 x 117 x 119 mm, 1480 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D850 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.

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Body comparison

The side-by-side display below illustrates the physical size and weight of the Nikon D850 and the Pentax 645D. 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.

Size Nikon D850 vs Pentax 645D
Compare D850 versus 645D top
Comparison D850 or 645D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D850 and the Pentax 645D are of equal size. However, the 645D is substantially heavier (47 percent) than the D850. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 D850 gets 1840 shots out of its EN-EL15a battery, while the 645D can take 800 images on a single charge of its D-LI90 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 amazon.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
5.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
6.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999ebay.com
7.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
8.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499ebay.com
9.
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299ebay.com
10.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749ebay.com
11.
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 1,999ebay.com
12.
 
Nikon D600 141 mm 113 mm 82 mm 850 g 900 Y Sep 2012 2,099ebay.com
13.
 
Nikon D800 146 mm 123 mm 82 mm 1000 g 900 Y Feb 2012 2,999ebay.com
14.
 
Nikon D800E 146 mm 123 mm 82 mm 1000 g 900 Y Feb 2012 3,299ebay.com
15.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
16.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 amazon.com
17.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. 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 D850 was launched at a markedly lower price (by 67 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 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Nikon D850 features a full frame sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 69 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 0.79. The sensor in the D850 has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.

Nikon D850 and Pentax 645D sensor measures

Despite having a smaller sensor, the Nikon D850 offers a higher resolution of 45.4 megapixels, compared with 39.5 MP of the Pentax 645D. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.35μm versus 6.06μm for the 645D). However, it should be noted that the D850 is much more recent (by 7 years and 4 months) than the 645D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. 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 Nikon D850 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D850 for good quality output (200 dots per inch) amounts to 41.3 x 27.5 inches or 104.9 x 69.9 cm, for very good quality (250 dpi) 33 x 22 inches or 83.9 x 55.9 cm, and for excellent quality (300 dpi) 27.5 x 18.3 inches or 69.9 x 46.6 cm. The corresponding values for the Pentax 645D are 36.3 x 27.2 inches or 92.3 x 69.1 cm for good quality, 29.1 x 21.8 inches or 73.8 x 55.3 cm for very good quality, and 24.2 x 18.1 inches or 61.5 x 46.1 cm for excellent quality prints.

The Nikon D850 has a native sensitivity range from ISO 64 to ISO 25600, which can be extended to ISO 32-102400. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the D850 is build around a BSI-CMOS sensor, while the 645D uses a CCD 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.

D850 versus 645D MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 D850 provides substantially higher image quality than the 645D, with an overall score that is 18 points higher. This advantage is based on 1.8 bits higher color depth, 2.2 EV in additional dynamic range, and 1.1 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.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
3.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
5.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
6.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
7.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
8.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
9.
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
10.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
11.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
12.
 
Nikon D600 Full Frame 24.2 6016 40161080/30p25.114.2298094
13.
 
Nikon D800 Full Frame 36.2 7360 49121080/30p25.314.4285395
14.
 
Nikon D800E Full Frame 36.2 7360 49121080/30p25.614.3297996
15.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
16.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
17.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
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Many modern cameras are not only capable of taking still images, but can also record movies. The D850 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the D850 can use is 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D850 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 D850 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 0.75x), 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 Nikon D850 and Pentax 645D in connection with corresponding information for a sample of similar cameras.

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Core Features
# image 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.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0/s n n
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
3.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
5.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
6.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
7.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
8.
 
Nikon D5optical Y3.2 / 2359 fixed Y 1/8000s 14.0/s n n
9.
 
Nikon D810optical Y3.2 / 1229 fixed n 1/8000s 5.0/s Y n
10.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5/s n n
11.
 
Nikon D610optical Y3.2 / 921 fixed n 1/4000s 6.0/s Y n
12.
 
Nikon D600optical Y3.0 / 921 fixed n 1/4000s 5.5/s Y n
13.
 
Nikon D800optical Y3.2 / 921 fixed n 1/8000s 4.0/s Y n
14.
 
Nikon D800Eoptical Y3.2 / 921 fixed n 1/8000s 4.0/s Y n
15.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
16.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
17.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The D850 has a touchscreen, while the 645D has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The Nikon D850 and the Pentax 645D 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.

The D850 writes its imaging data to SDXC or XQD cards, while the 645D uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The D850 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the 645D cannot take advantage of Ultra High Speed SD cards.

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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 Nikon D850 and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D850Ystereo / monoYYmini3.0YYY
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 5DSYmono / monoY-mini3.0---
4.
 
Canon 5DS RYmono / monoY-mini3.0---
5.
 
Canon 1D XYmono / -Y-mini2.0---
6.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
7.
 
Leica S Typ 006Y- / ---mini2.0---
8.
 
Nikon D5Ystereo / monoYYmini3.0---
9.
 
Nikon D810Ystereo / monoYYmini3.0Y--
10.
 
Nikon DfY- / ---mini2.0---
11.
 
Nikon D610Ymono / monoYYmini2.0---
12.
 
Nikon D600Ymono / monoYYmini2.0---
13.
 
Nikon D800Ymono / monoYYmini3.0---
14.
 
Nikon D800EYmono / monoYYmini3.0---
15.
 
Nikon D3SYstereo / ---mini2.0---
16.
 
Pentax 645ZYstereo / monoY-mini3.0---
17.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
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It is notable that the D850 offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

The D850 is a recent model that features in the current product line-up of Nikon. In contrast, the 645D has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the 645D was succeeded by the Pentax 645Z. Further information on the features and operation of the D850 and 645D can be found, respectively, in the Nikon D850 Manual (free pdf) or the online Pentax 645D Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Nikon D850 and the Pentax 645D? Which camera is better? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Nikon D850:

  • More detail: Offers more megapixels (45.4 vs 39.5MP) with a 9% higher linear resolution.
  • Better image quality: Scores substantially higher (18 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.8 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (2.2 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.1 stops ISO advantage).
  • Broader imaging potential: Can record not only still images but also 4K/30p movies.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (2359k vs 921k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • 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.
  • Less heavy: Is lighter (by 475g or 32 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (1840 versus 800) on a single battery charge.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • 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.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards.
  • More affordable: Was introduced into a lower priced category (67 percent cheaper at launch).
  • More modern: Reflects 7 years and 4 months of technical progress since the 645D launch.

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Arguments in favor of the Pentax 645D:

  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.75x).
  • More heavily discounted: Has been around for much longer (launched in March 2010).

If the number of relative strengths (bullet points above) is taken as a guide, the D850 is the clear winner of the match-up (22 : 2 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.

D850 22:02 645D

How about other alternatives? Do the specifications of the Nikon D850 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 technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the D850 and the 645D in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 amazon.com
2.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
3.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 3,699ebay.com
4.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
5.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
6.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999ebay.com
7.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
8.
 
Nikon D5....4/589/1004.5/55/5 Jan 2016 6,499ebay.com
9.
 
Nikon D8105/5..5/586/1005/54.5/5 Jun 2014 3,299ebay.com
10.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 2,749ebay.com
11.
 
Nikon D6104/5+ +..87/1004.5/54.5/5 Oct 2013 1,999ebay.com
12.
 
Nikon D6004/5+ +..87/1005/54.5/5 Sep 2012 2,099ebay.com
13.
 
Nikon D8005/5+ +..82/1005/55/5 Feb 2012 2,999ebay.com
14.
 
Nikon D800E......84/1005/55/5 Feb 2012 3,299ebay.com
15.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
16.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499 amazon.com
17.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Nikon D850 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 Specifications
    Camera Model Nikon D850 Pentax 645D
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax 645 mount lenses
    Launch Date July 2017 March 2010
    Launch Price USD 3,299 USD 9,995
    Sensor Specs Nikon D850 Pentax 645D
    Sensor Technology BSI-CMOS CCD
    Sensor Format Full Frame Sensor Medium Format Sensor
    Sensor Size 35.9 x 23.9 mm 44.0 x 33.0 mm
    Sensor Area 858.01 mm2 1452 mm2
    Sensor Diagonal 43.1 mm 55 mm
    Crop Factor 1.0x 0.79x
    Sensor Resolution 45.4 Megapixels 39.5 Megapixels
    Image Resolution 8256 x 5504 pixels 7264 x 5440 pixels
    Pixel Pitch 4.35 μm 6.06 μm
    Pixel Density 5.30 MP/cm2 2.72 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video no Video
    ISO Setting 64 - 25,600 ISO 100 - 1,600 ISO
    ISO Boost 32 - 102,400 ISO no Enhancement
    Image Processor EXPEED 5 PRIME II
    DXO Sensor Quality (score) 100 82
    DXO Color Depth (bits) 26.4 24.6
    DXO Dynamic Range (EV) 14.8 12.6
    DXO Low Light (ISO) 2660 1262
    Screen Specs Nikon D850 Pentax 645D
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.75x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 2359k dots 921k dots
    LCD Attachment Tilting screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Nikon D850 Pentax 645D
    Focus System Phase-detect AF Phase-detect AF
    Continuous Shooting 9 shutter flaps/s 1.1 shutter flaps/s
    Shutter Life Expectancy200 000 actuations50 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC or XQD cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support UHS-II no
    Connectivity Specs Nikon D850 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 3.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Near-Field Communication NFC built-in no NFC
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Nikon D850 Pentax 645D
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type EN-EL15a D-LI90
    Battery Life (CIPA)1840 shots per charge800 shots per charge
    Body Dimensions 146 x 124 x 79 mm
    (5.7 x 4.9 x 3.1 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 1005 g (35.5 oz) 1480 g (52.2 oz)
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