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Nikon D7100 vs Pentax 645D

The Nikon D7100 and the Pentax 645D are two digital cameras that were announced, respectively, in February 2013 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D7100) and a medium format (645D) sensor. The Nikon has a resolution of 24 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 D7100
versus
Pentax 645D
Nikon D7100   Pentax 645D
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
24 MP – APS-C sensor 39.5 MP – Medium Format sensor
1080/60p Video no Video
ISO 100-6,400 (50 - 25,600) ISO 100-1,600
Optical viewfinder Optical viewfinder
3.2" LCD – 1229k dots 3.0" LCD – 921k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
6 shutter flaps per second 1.1 shutter flaps per second
Weathersealed bodyWeathersealed body
950 shots per battery charge800 shots per battery charge
136 x 107 x 76 mm, 765 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 D7100 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.

Body comparison

The physical size and weight of the Nikon D7100 and the Pentax 645D are illustrated 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.

Size Nikon D7100 vs Pentax 645D
Compare D7100 versus 645D top
Comparison D7100 or 645D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645D is notably larger (25 percent) than the Nikon D7100. Moreover, the 645D is substantially heavier (93 percent) than the D7100. 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 D7100 gets 950 shots out of its EN-EL15 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. 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.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D7100 136 mm 107 mm 76 mm 765 g 950 Y Feb 2013 1,199ebay.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
3.
 
Canon 70D 139 mm 104 mm 79 mm 755 g 920 Y Jul 2013 1,199ebay.com
4.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
5.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999ebay.com
6.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
7.
 
Nikon D7500 136 mm 104 mm 73 mm 720 g 950 Y Apr 2017 1,299 amazon.com
8.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 1,999 amazon.com
9.
 
Nikon D7200 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199ebay.com
10.
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 2,299ebay.com
11.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499ebay.com
12.
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 1,999 amazon.com
13.
 
Nikon D600 141 mm 113 mm 82 mm 850 g 900 Y Sep 2012 2,099ebay.com
14.
 
Nikon D7000 132 mm 105 mm 77 mm 780 g 1050 Y Sep 2010 1,499ebay.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 RX10 129 mm 88 mm 102 mm 813 g 420 Y Oct 2013 1,299ebay.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 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 D7100 was launched at a markedly lower price (by 88 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 imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D7100 features an APS-C sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 296 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 0.79. The sensor in the D7100 has a native 3:2 aspect ratio, while the one in the 645D offers a 4:3 aspect.

Nikon D7100 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the D7100 (24MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.91μm for the D7100) due to its larger sensor. However, the D7100 is a much more recent model (by 2 years and 11 months) than the 645D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that 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 Nikon D7100 are 30 x 20 inches or 76.2 x 50.8 cm for good quality, 24 x 16 inches or 61 x 40.6 cm for very good quality, and 20 x 13.3 inches or 50.8 x 33.9 cm for excellent quality prints.

The Nikon D7100 has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 50-25600. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the D7100 is build around a 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.

D7100 versus 645D MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D7100 APS-C 24.0 6000 40001080/60p24.213.7125683
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
3.
 
Canon 70D APS-C 20.0 5472 36481080/30p22.511.692668
4.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
5.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
6.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
7.
 
Nikon D7500 APS-C 20.7 5568 37124K/30p24.314.0148386
8.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
9.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
10.
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
11.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
12.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
13.
 
Nikon D600 Full Frame 24.2 6016 40161080/30p25.114.2298094
14.
 
Nikon D7000 APS-C 16.1 4928 32641080/24p23.513.9116780
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 RX10 1-inch 20.0 5472 36481080/60p22.912.647469

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The D7100 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the D7100 can use is 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D7100 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 D7100 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 0.63x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D7100 and Pentax 645D along with similar information for a selection of comparators.

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Core Features
    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 D7100optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
3.
 
Canon 70Doptical Y3.0 / 1040 swivel Y 1/8000s 7.0/s Y n
4.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
5.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
6.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
7.
 
Nikon D7500optical Y3.2 / 922 tilting Y 1/8000s 8.0/s Y n
8.
 
Nikon D500optical Y3.2 / 2359 tilting Y 1/8000s 10.0/s n n
9.
 
Nikon D7200optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
10.
 
Nikon D750optical Y3.2 / 1229 tilting n 1/4000s 6.0/s Y n
11.
 
Nikon D3300optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
12.
 
Nikon D610optical Y3.2 / 921 fixed n 1/4000s 6.0/s Y n
13.
 
Nikon D600optical Y3.0 / 921 fixed n 1/4000s 5.5/s Y n
14.
 
Nikon D7000optical Y3.0 / 921 fixed n 1/8000s 6.0/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 RX101440 Y3.0 / 1229 tilting n 1/3200s 10.0/s Y Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The D7100 has one, while the 645D does not. While the built-in flash of the D7100 is not very powerful, it can at times be useful as a fill-in light.

The Nikon D7100 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.

Concerning the storage of imaging data, both the D7100 and the 645D write their files to SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The D7100 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 Nikon D7100 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
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D7100Ystereo / monoYYmini2.0---
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 70DYstereo / monoY-mini2.0Y--
4.
 
Canon 1D XYmono / -Y-mini2.0---
5.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
6.
 
Leica S Typ 006Y- / ---mini2.0---
7.
 
Nikon D7500Ystereo / monoYYmini2.0Y-Y
8.
 
Nikon D500Ystereo / monoYYmini3.0YYY
9.
 
Nikon D7200Ystereo / monoYYmini2.0YY-
10.
 
Nikon D750Ystereo / monoYYmini2.0Y--
11.
 
Nikon D3300Ymono / monoY-mini2.0---
12.
 
Nikon D610Ymono / monoYYmini2.0---
13.
 
Nikon D600Ymono / monoYYmini2.0---
14.
 
Nikon D7000Ymono / monoY-mini2.0---
15.
 
Nikon D3SYstereo / ---mini2.0---
16.
 
Pentax 645ZYstereo / monoY-mini3.0---
17.
 
Sony RX10Ystereo / monoYYmicro2.0YY-

Studio photographers will appreciate that the Pentax 645D (unlike the D7100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D7100 and the 645D have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the D7100 was followed by the Nikon D7200. Further information on the features and operation of the D7100 and 645D can be found, respectively, in the Nikon D7100 Manual (free pdf) or the online Pentax 645D Manual.

Review summary

So what conclusions can be drawn? Is the Nikon D7100 better than the Pentax 645D or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Nikon D7100:

  • More dynamic range: Captures a larger spectrum of light and dark details (1.1 EV of extra DR).
  • Broader imaging potential: Can record not only still images but also 1080/60p 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 (1229k vs 921k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (6 vs 1.1 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (136x107mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 715g or 48 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (950 versus 800) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (88 percent cheaper at launch).
  • More modern: Reflects 2 years and 11 months of technical progress since the 645D launch.

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Arguments in favor of the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 24MP), which boosts linear resolution by 26%.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.63x).
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • 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 D7100 is the clear winner of the match-up (14 : 4 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional 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.

D7100 14:04 645D

How about other alternatives? Do the specifications of the Nikon D7100 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 remains incomplete and does no justice, for example, to the way the D7100 or the 645D perform in practice. 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 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D71005/5+ +..85/1004.5/54.5/5 Feb 2013 1,199ebay.com
2.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
3.
 
Canon 70D5/5+ +..83/1004.5/55/5 Jul 2013 1,199ebay.com
4.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
5.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999ebay.com
6.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
7.
 
Nikon D75004.5/5+ +4.5/586/1005/54.5/5 Apr 2017 1,299 amazon.com
8.
 
Nikon D5005/5+ +4.7/591/1004.5/55/5 Jan 2016 1,999 amazon.com
9.
 
Nikon D72004/5+ +..84/1004.5/54.5/5 Mar 2015 1,199ebay.com
10.
 
Nikon D7505/5+ +4/590/1004.5/54.5/5 Sep 2014 2,299ebay.com
11.
 
Nikon D33003/5+..77/1004.5/54.5/5 Jan 2014 499ebay.com
12.
 
Nikon D6104/5+ +..87/1004.5/54.5/5 Oct 2013 1,999 amazon.com
13.
 
Nikon D6004/5+ +..87/1005/54.5/5 Sep 2012 2,099ebay.com
14.
 
Nikon D70004/5....80/1004.5/54.5/5 Sep 2010 1,499ebay.com
15.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
16.
 
Pentax 645Z5/5......4.5/55/5 Apr 2014 8,499 amazon.com
17.
 
Sony RX105/5+..80/1004.5/54.5/5 Oct 2013 1,299ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and 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.

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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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Nikon D7100 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 D7100 Pentax 645D
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax 645 mount lenses
    Launch Date February 2013 March 2010
    Launch Price USD 1,199 USD 9,995
    Sensor Specs Nikon D7100 Pentax 645D
    Sensor Technology CMOS CCD
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 23.5 x 15.6 mm 44.0 x 33.0 mm
    Sensor Area 366.6 mm2 1452 mm2
    Sensor Diagonal 28.2 mm 55 mm
    Crop Factor 1.5x 0.79x
    Sensor Resolution 24 Megapixels 39.5 Megapixels
    Image Resolution 6000 x 4000 pixels 7264 x 5440 pixels
    Pixel Pitch 3.91 μm 6.06 μm
    Pixel Density 6.55 MP/cm2 2.72 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/60p Video no Video
    ISO Setting 100 - 6,400 ISO 100 - 1,600 ISO
    ISO Boost 50 - 25,600 ISO no Enhancement
    Image Processor EXPEED 4 PRIME II
    DXO Sensor Quality (score) 83 82
    DXO Color Depth (bits) 24.2 24.6
    DXO Dynamic Range (EV) 13.7 12.6
    DXO Low Light (ISO) 1256 1262
    Screen Specs Nikon D7100 Pentax 645D
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.63x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 1229k dots 921k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Nikon D7100 Pentax 645D
    Focus System Phase-detect AF Phase-detect AF
    Continuous Shooting 6 shutter flaps/s 1.1 shutter flaps/s
    Shutter Life Expectancy150 000 actuations50 000 actuations
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Dual card slots Dual card slots
    UHS card support UHS-I no
    Connectivity Specs Nikon D7100 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D7100 Pentax 645D
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type EN-EL15 D-LI90
    Battery Life (CIPA)950 shots per charge800 shots per charge
    Body Dimensions 136 x 107 x 76 mm
    (5.4 x 4.2 x 3.0 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 765 g (27.0 oz) 1480 g (52.2 oz)
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