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Nikon D100 vs Pentax 645Z

The Nikon D100 and the Pentax 645Z are two digital cameras that were officially introduced, respectively, in February 2002 and April 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D100) and a medium format (645Z) sensor. The Nikon has a resolution of 6 megapixels, whereas the Pentax provides 51.1 MP.

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

Headline Specifications
Nikon D100
versus
Pentax 645Z
Nikon D100   Pentax 645Z
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Pentax 645 mount lenses
6 MP – APS-C sensor 51.1 MP – Medium Format sensor
no Video 1080/60i Video
ISO 200-800 (200 - 1,600) ISO 100-204,800
Optical viewfinder Optical viewfinder
1.8" LCD – 118k dots 3.2" LCD – 1037k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
3 shutter flaps per second 3 shutter flaps per second
not weather sealedWeathersealed body
370 shots per battery charge650 shots per battery charge
144 x 116 x 81 mm, 780 g 156 x 117 x 123 mm, 1550 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D100 and the Pentax 645Z? 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 D100 and the Pentax 645Z. 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 measures are rounded to the nearest millimeter.

Size Nikon D100 vs Pentax 645Z
Compare D100 versus 645Z top
Comparison D100 or 645Z rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645Z is notably larger (9 percent) than the Nikon D100. Moreover, the 645Z is substantially heavier (99 percent) than the D100. It is noteworthy in this context that the 645Z is splash and dust-proof, while the D100 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the D100 gets 370 shots out of its Nikon EN-EL3 battery, while the 645Z can take 650 images on a single charge of its Pentax D-LI90 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D100 144 mm 116 mm 81 mm 780 g 370 n Feb 2002 US$ 1 999ebay.com
2.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 US$ 8 499ebay.com
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 US$ 3 699ebay.com
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 US$ 3 699ebay.com
5.
 
Canon 10D 150 mm 107 mm 75 mm 850 g 500 n Feb 2003 US$ 1 999ebay.com
6.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 US$ 8 995ebay.com
7.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 US$ 7 449ebay.com
8.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 US$ 499ebay.com
9.
 
Nikon D70 140 mm 111 mm 78 mm 679 g 400 n Jan 2004 US$ 999ebay.com
10.
 
Nikon D70s 140 mm 111 mm 78 mm 679 g 500 n Apr 2005 US$ 899ebay.com
11.
 
Nikon D80 132 mm 103 mm 77 mm 668 g 600 n Aug 2006 US$ 999ebay.com
12.
 
Nikon D90 132 mm 103 mm 77 mm 703 g 850 n Aug 2008 US$ 1 299ebay.com
13.
 
Nikon D200 147 mm 113 mm 74 mm 920 g 400 Y Nov 2005 US$ 1 699ebay.com
14.
 
Nikon D300 147 mm 114 mm 74 mm 925 g 1000 Y Aug 2007 US$ 1 799ebay.com
15.
 
Nikon D300S 147 mm 115 mm 81 mm 938 g 950 Y Jul 2009 US$ 1 799ebay.com
16.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 US$ 1 999ebay.com
17.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 US$ 9 995ebay.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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The D100 was launched at a markedly lower price (by 76 percent) than the 645Z, 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 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D100 features an APS-C sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 288 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 D100 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Nikon D100 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the D100 (6MP), but the 645Z has smaller individual pixels (pixel pitch of 5.30μm versus 7.85μm for the D100). Yet, the 645Z is a much more recent model (by 12 years and 1 month) than the D100, 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 the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax 645Z implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645Z for good quality output (200 dots per inch) amounts to 41.3 x 31 inches or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inches or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inches or 69.9 x 52.4 cm. The corresponding values for the Nikon D100 are 15 x 10 inches or 38.2 x 25.4 cm for good quality, 12 x 8 inches or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inches or 25.5 x 16.9 cm for excellent quality prints.

The Nikon D100 has a native sensitivity range from ISO 200 to ISO 800, which can be extended to ISO 200-1600. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).

In terms of underlying technology, the D100 is build around a CCD sensor, while the 645Z 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.

D100 versus 645Z MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D100 APS-C 6.0 3008 2000none20.49.939448
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
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 10D APS-C 6.3 3072 2048none21.110.957157
6.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
7.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
8.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
9.
 
Nikon D70 APS-C 6.0 3008 2000none20.410.352950
10.
 
Nikon D70s APS-C 6.0 3008 2000none20.410.352950
11.
 
Nikon D80 APS-C 10.0 3872 2592none22.111.252461
12.
 
Nikon D90 APS-C 12.2 4288 2848720/24p22.712.597773
13.
 
Nikon D200 APS-C 10.0 3872 2592none22.311.558364
14.
 
Nikon D300 APS-C 12.2 4288 2848none22.112.067967
15.
 
Nikon D300S APS-C 12.2 4288 2848720/24p22.512.278770
16.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
17.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. The 645Z indeed provides for movie recording, while the D100 does not. The highest resolution format that the 645Z can use is 1080/60i.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D100 and the 645Z 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 645Z offers a wider field of view (98%) than the one in the D100 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.53x), 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 D100 and Pentax 645Z in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty 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 D100optical Y1.8 / 118 fixed n 1/4000s 3.0/s Y n
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/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 10Doptical Y1.8 / 118 fixed n 1/4000s 3.0/s Y n
6.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3/s n n
7.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0/s n n
8.
 
Nikon D40optical n2.5 / 230 fixed n 1/4000s 2.5/s Y n
9.
 
Nikon D70optical n1.8 / 130 fixed n 1/8000s 3.0/s Y n
10.
 
Nikon D70soptical n2.0 / 130 fixed n 1/8000s 3.0/s Y n
11.
 
Nikon D80optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
12.
 
Nikon D90optical Y3.0 / 920 fixed n 1/4000s 4.5/s Y n
13.
 
Nikon D200optical Y2.5 / 230 fixed n 1/8000s 5.0/s Y n
14.
 
Nikon D300optical Y3.0 / 922 fixed n 1/8000s 6.0/s Y n
15.
 
Nikon D300Soptical Y3.0 / 920 fixed n 1/8000s 7.0/s Y n
16.
 
Nikon D500optical Y3.2 / 2359 tilting Y 1/8000s 10.0/s n n
17.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
Note: *) 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 D100 has one, while the 645Z does not. While the built-in flash of the D100 is not very powerful, it can at times be useful as a fill-in light.

The Pentax 645Z has 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 D100 writes its imaging data to Compact Flash cards, while the 645Z uses SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the D100 only has one slot.

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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 D100 and Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D100Y- / ----1.1---
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 5DSYmono / monoY-mini3.0---
4.
 
Canon 5DS RYmono / monoY-mini3.0---
5.
 
Canon 10DY- / ----1.1---
6.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
7.
 
Leica SLYstereo / monoYYfull3.0Y--
8.
 
Nikon D40Y- / ----2.0---
9.
 
Nikon D70Y- / ----1.0---
10.
 
Nikon D70sY- / ----2.0---
11.
 
Nikon D80Y- / ----2.0---
12.
 
Nikon D90Ymono / mono--mini2.0---
13.
 
Nikon D200Y- / ----2.0---
14.
 
Nikon D300Y- / ---mini2.0---
15.
 
Nikon D300SYstereo / monoY-mini2.0---
16.
 
Nikon D500Ystereo / monoYYmini3.0YYY
17.
 
Pentax 645DYstereo / ----2.0---

Studio photographers will appreciate that the Pentax 645Z (unlike the D100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D100 and the 645Z have been discontinued, but can regularly be found used on ebay. The D100 was replaced by the Nikon D200, while the 645Z does not have a direct successor. Further information on the features and operation of the D100 and 645Z can be found, respectively, in the Nikon D100 Manual (free pdf) or the online Pentax 645Z Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Nikon D100 and the Pentax 645Z? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Nikon D100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Less heavy: Is lighter (by 770g or 50 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (76 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2002).

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Advantages of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 6MP), which boosts linear resolution by 186%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • More complete view: Has a viewfinder with a larger field of view (98% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.53x).
  • Larger screen: Has a bigger rear LCD (3.2" vs 1.8") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 118k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (650 versus 370) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 1.1).
  • 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 modern: Reflects 12 years and 1 month of technical progress since the D100 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the 645Z is the clear winner of the contest (19 : 5 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.

D100 05:19 645Z

How about other alternatives? Do the specifications of the Nikon D100 and the Pentax 645Z 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the D100 or the 645Z 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 where reviews by experts come in. 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D100......+ +o.. Feb 2002 US$ 1 999ebay.com
2.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 US$ 8 499ebay.com
3.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 US$ 3 699ebay.com
4.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 US$ 3 699ebay.com
5.
 
Canon 10D......+ +.... Feb 2003 US$ 1 999ebay.com
6.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 US$ 8 995ebay.com
7.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 US$ 7 449ebay.com
8.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 US$ 499ebay.com
9.
 
Nikon D70......+ +.... Jan 2004 US$ 999ebay.com
10.
 
Nikon D70s..........5/5 Apr 2005 US$ 899ebay.com
11.
 
Nikon D80..+..+ +o4.5/5 Aug 2006 US$ 999ebay.com
12.
 
Nikon D90..+ +..+ +4/54.5/5 Aug 2008 US$ 1 299ebay.com
13.
 
Nikon D200..+ +..+ +o.. Nov 2005 US$ 1 699ebay.com
14.
 
Nikon D300..+ +..+ +5/54.5/5 Aug 2007 US$ 1 799ebay.com
15.
 
Nikon D300S5/5+ +..82/1004/54.5/5 Jul 2009 US$ 1 799ebay.com
16.
 
Nikon D5005/5+ +4.7/591/1004.5/55/5 Jan 2016 US$ 1 999ebay.com
17.
 
Pentax 645D5/5.......... Mar 2010 US$ 9 995ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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? In case you would like to check on the differences and similarities of other camera models, just use the search menu below. 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: Nikon D100 vs Pentax 645Z

    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 D100 Pentax 645Z
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Pentax 645 mount lenses
    Launch Date February 2002 April 2014
    Launch Price USD 1,999 USD 8,499
    Sensor Specs Nikon D100 Pentax 645Z
    Sensor Technology CCD CMOS
    Sensor Format APS-C Sensor Medium Format Sensor
    Sensor Size 23.7 x 15.6 mm 43.8 x 32.8 mm
    Sensor Area 369.72 mm2 1436.64 mm2
    Sensor Diagonal 28.4 mm 54.7 mm
    Crop Factor 1.5x 0.79x
    Sensor Resolution 6 Megapixels 51.1 Megapixels
    Image Resolution 3008 x 2000 pixels 8256 x 6192 pixels
    Pixel Pitch 7.85 μm 5.30 μm
    Pixel Density 1.63 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 200 - 800 ISO 100 - 204,800 ISO
    ISO Boost 200 - 1,600 ISO no Enhancement
    DXO Sensor Quality (score) .. 101
    DXO Color Depth (bits) .. 26.0
    DXO Dynamic Range (EV) .. 14.7
    DXO Low Light (ISO) .. 4505
    Screen Specs Nikon D100 Pentax 645Z
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 98%
    Viewfinder Magnification 0.53x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 1.8inch 3.2inch
    LCD Resolution 118k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D100 Pentax 645Z
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 3 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy50 000 actuations100 000 actuations
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    Connectivity Specs Nikon D100 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 1.1 USB 3.0
    HDMI Port no HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D100 Pentax 645Z
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL3 Pentax D-LI90
    Battery Life (CIPA)370 shots per charge650 shots per charge
    Body Dimensions 144 x 116 x 81 mm
    (5.7 x 4.6 x 3.2 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 780 g (27.5 oz) 1550 g (54.7 oz)
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