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Nikon D3100 vs Pentax MX-1

The Nikon D3100 and the Pentax MX-1 are two digital cameras that were revealed to the public, respectively, in August 2010 and January 2013. The D3100 is a DSLR, while the MX-1 is a fixed lens compact. The cameras are based on an APS-C (D3100) and a 1/1.7-inch (MX-1) sensor. The Nikon has a resolution of 14.2 megapixels, whereas the Pentax provides 12 MP.

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

Headline Specifications
Nikon D3100
versus
Pentax MX-1
Nikon D3100   Pentax MX-1
Digital single lens reflex Fixed lens compact camera
Nikon F mount lenses 28-112mm f/1.8-2.5
14.2 MP – APS-C sensor 12 MP – 1/1.7" sensor
1080/24p Video 1080/30p Video
ISO 100-3,200 (100 - 12,800) ISO 100-12,800
Optical viewfinder No viewfinder, LCD framing
3.0" LCD – 230k dots 3.0" LCD – 920k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
3 shutter flaps per second 1 shutter flaps per second
Lens stabilization onlyIn-body stabilization
550 shots per battery charge290 shots per battery charge
124 x 96 x 75 mm, 505 g 122 x 61 x 51 mm, 391 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Pentax MX-1? 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

An illustration of the physical size and weight of the Nikon D3100 and the Pentax MX-1 is provided 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.

The D3100 can be obtained in two different colors (black, red), while the MX-1 is only available in black.

Size Nikon D3100 vs Pentax MX-1
Compare D3100 versus MX-1 top
Comparison D3100 or MX-1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax MX-1 is considerably smaller (37 percent) than the Nikon D3100. In this context, it is worth noting that neither the D3100 nor the MX-1 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the MX-1 has a lens built in, whereas the D3100 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the D3100 and their specifications in the Nikon Lens Catalog.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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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 D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599ebay.com
2.
 
Pentax MX-1 122 mm 61 mm 51 mm 391 g 290 n Jan 2013 499ebay.com
3.
 
Canon G16 109 mm 76 mm 40 mm 356 g 360 n Aug 2013 549ebay.com
4.
 
Canon G15 107 mm 76 mm 40 mm 352 g 350 n Sep 2012 499ebay.com
5.
 
Nikon P7800 119 mm 78 mm 50 mm 399 g 350 n Sep 2013 549ebay.com
6.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599ebay.com
7.
 
Nikon D5100 128 mm 97 mm 79 mm 560 g 660 n Apr 2011 749ebay.com
8.
 
Nikon D7000 132 mm 105 mm 77 mm 780 g 1050 Y Sep 2010 1,499ebay.com
9.
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599ebay.com
10.
 
Nikon D5000 127 mm 104 mm 80 mm 590 g 510 n Apr 2009 749ebay.com
11.
 
Nikon D60 126 mm 94 mm 64 mm 522 g 500 n Jan 2008 629ebay.com
12.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
13.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499ebay.com
14.
 
Olympus XZ-2 113 mm 65 mm 48 mm 346 g 340 n Sep 2012 599ebay.com
15.
 
Panasonic LF1 103 mm 62 mm 28 mm 192 g 250 n Apr 2013 499ebay.com
16.
 
Sony NEX-5N 111 mm 59 mm 38 mm 269 g 460 n Aug 2011 699ebay.com
17.
 
Sony NEX-C3 110 mm 60 mm 33 mm 225 g 400 n Jun 2011 599ebay.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 obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The MX-1 was launched at a lower price than the D3100, despite having a lens built in. 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. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. 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 Nikon D3100 features an APS-C sensor and the Pentax MX-1 a 1/1.7-inch sensor. The sensor area in the MX-1 is 88 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 4.5. The sensor in the D3100 has a native 3:2 aspect ratio, while the one in the MX-1 offers a 4:3 aspect.

Nikon D3100 and Pentax MX-1 sensor measures

With 14.2MP, the D3100 offers a higher resolution than the MX-1 (12MP), but the D3100 nevertheless has larger individual pixels (pixel pitch of 5.01μm versus 1.89μm for the MX-1) due to its larger sensor. However, the MX-1 is a much more recent model (by 2 years and 4 months) than the D3100, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Nikon D3100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D3100 for good quality output (200 dots per inch) amounts to 23 x 15.4 inches or 58.5 x 39 cm, for very good quality (250 dpi) 18.4 x 12.3 inches or 46.8 x 31.2 cm, and for excellent quality (300 dpi) 15.4 x 10.2 inches or 39 x 26 cm. The corresponding values for the Pentax MX-1 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 cm for excellent quality prints.

The Nikon D3100 has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 100-12800. The corresponding ISO settings for the Pentax MX-1 are ISO 100 to ISO 12800 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

D3100 versus MX-1 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"). Of the two cameras under review, the D3100 provides substantially higher image quality than the MX-1, with an overall score that is 18 points higher. This advantage is based on 2.1 bits higher color depth, and 2.1 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.

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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 D3100 APS-C 14.2 4608 30721080/24p22.511.391967
2.
 
Pentax MX-1 1/1.7 12.0 4000 30001080/30p20.411.320849
3.
 
Canon G16 1/1.7 12.0 4000 30001080/60p21.011.723054
4.
 
Canon G15 1/1.7 12.0 4000 30001080/24p19.911.516546
5.
 
Nikon P7800 1/1.7 12.0 4000 30001080/30p21.211.720054
6.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
7.
 
Nikon D5100 APS-C 16.1 4928 32641080/30p23.513.6118380
8.
 
Nikon D7000 APS-C 16.1 4928 32641080/24p23.513.9116780
9.
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
10.
 
Nikon D5000 APS-C 12.2 4288 2848720/24p22.712.586872
11.
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
12.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
13.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
14.
 
Olympus XZ-2 1/1.7 11.8 3968 29761080/30p20.411.321649
15.
 
Panasonic LF1 1/1.7 12.0 4000 30001080/60i20.811.621152
16.
 
Sony NEX-5N APS-C 16.0 4912 32641080/60i23.612.7107977
17.
 
Sony NEX-C3 APS-C 16.0 4912 3264720/30p22.712.2108373
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Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the MX-1 provides a faster frame rate than the D3100. It can shoot movie footage at 1080/30p, while the Nikon is limited to 1080/24p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the D3100 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the MX-1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Nikon D3100 and Pentax MX-1 along with similar information for a selection of comparators.

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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 D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
2.
 
Pentax MX-1none n3.0 / 920 tilting n 1/8000s 1.0/s Y Y
3.
 
Canon G16optical n3.0 / 922 fixed n 1/4000s 2.2/s Y Y
4.
 
Canon G15optical n3.0 / 922 fixed n 1/4000s 2.1/s Y Y
5.
 
Nikon P7800921 n3.0 / 921 swivel n 1/4000s 8.0/s Y Y
6.
 
Nikon D3200optical n3.0 / 921 fixed n 1/4000s 4.0/s Y n
7.
 
Nikon D5100optical n3.0 / 921 swivel n 1/4000s 4.0/s Y n
8.
 
Nikon D7000optical Y3.0 / 921 fixed n 1/8000s 6.0/s Y n
9.
 
Nikon D3000optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
10.
 
Nikon D5000optical n2.7 / 230 full-flex n 1/4000s 4.0/s Y n
11.
 
Nikon D60optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
12.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
13.
 
Nikon D40optical n2.5 / 230 fixed n 1/4000s 2.5/s Y n
14.
 
Olympus XZ-2optional n3.0 / 920 tilting Y 1/2000s 5.0/s Y Y
15.
 
Panasonic LF1200 n3.0 / 920 fixed n 1/4000s 10.0/s Y Y
16.
 
Sony NEX-5Noptional n3.0 / 920 tilting Y 1/4000s 10.0/s n n
17.
 
Sony NEX-C3optional n3.0 / 920 tilting n 1/4000s 5.5/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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Concerning the storage of imaging data, both the D3100 and the MX-1 write their files to SDXC 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 D3100 and Pentax MX-1 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 D3100Ymono / mono--mini2.0---
2.
 
Pentax MX-1-stereo / mono--mini2.0---
3.
 
Canon G16Ystereo / mono--mini2.0Y--
4.
 
Canon G15Ystereo / mono--mini2.0---
5.
 
Nikon P7800Ystereo / monoY-mini2.0---
6.
 
Nikon D3200Ymono / monoY-mini2.0---
7.
 
Nikon D5100Ymono / monoY-mini2.0---
8.
 
Nikon D7000Ymono / monoY-mini2.0---
9.
 
Nikon D3000Y- / ----2.0---
10.
 
Nikon D5000Ymono / mono--mini2.0---
11.
 
Nikon D60Y- / ----2.0---
12.
 
Nikon D40XY- / ----2.0---
13.
 
Nikon D40Y- / ----2.0---
14.
 
Olympus XZ-2Ystereo / mono--mini2.0---
15.
 
Panasonic LF1-stereo / mono--mini2.0YY-
16.
 
Sony NEX-5NYstereo / mono--mini2.0---
17.
 
Sony NEX-C3Ystereo / mono--mini2.0---
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It is notable that the D3100 has a hotshoe, while the MX-1 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Both the D3100 and the MX-1 have been discontinued, but can regularly be found used on ebay. The D3100 was replaced by the Nikon D3200, while the MX-1 does not have a direct successor. Further information on the features and operation of the D3100 and MX-1 can be found, respectively, in the Nikon D3100 Manual (free pdf) or the online Pentax MX-1 Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Nikon D3100 and the Pentax MX-1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Nikon D3100:

  • More detail: Offers more megapixels (14.2 vs 12MP) with a 11% higher linear resolution.
  • Better image quality: Scores substantially higher (18 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (2.1 bits more color depth).
  • Better low-light sensitivity: Requires less light for good images (2.1 stops ISO advantage).
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Faster burst: Shoots at higher frequency (3 vs 1 flaps/sec) to capture the decisive moment.
  • More flexible: Can take a variety of interchangeable lenses, including specialty optics.
  • Longer lasting: Can take more shots (550 versus 290) on a single battery charge.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • More heavily discounted: Has been available for much longer (launched in August 2010).

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Advantages of the Pentax MX-1:

  • Better video: Provides higher movie framerates (1080/30p versus 1080/24p).
  • More detailed LCD: Has a higher resolution rear screen (920k vs 230k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Ready to shoot: Comes with an integrated lens, while the D3100 requires a separate lens.
  • More compact: Is smaller (122x61mm vs 124x96mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens built in (unlike the D3100).
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More affordable: Was introduced at a lower price, despite coming with a built-in lens.
  • More modern: Reflects 2 years and 4 months of technical progress since the D3100 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the match-up finishes in a tie (10 points each). 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.

D3100 10:10 MX-1

How about other alternatives? Do the specifications of the Nikon D3100 and the Pentax MX-1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Travel-Zoom 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 incomplete and does no justice, for example, to the way the D3100 or the MX-1 perform in practice. 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 following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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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 D31005/5+ +..72/1004.5/54.5/5 Aug 2010 599ebay.com
2.
 
Pentax MX-13/5....74/1004/54/5 Jan 2013 499ebay.com
3.
 
Canon G164/5+....4.5/54.5/5 Aug 2013 549ebay.com
4.
 
Canon G154/5+..76/1004.5/54.5/5 Sep 2012 499ebay.com
5.
 
Nikon P78003/5......4/54.5/5 Sep 2013 549ebay.com
6.
 
Nikon D32005/5+ +..73/1004.5/54.5/5 Apr 2012 599ebay.com
7.
 
Nikon D51005/5+ +..76/1004.5/54.5/5 Apr 2011 749ebay.com
8.
 
Nikon D70004/5....80/1004.5/54.5/5 Sep 2010 1,499ebay.com
9.
 
Nikon D3000..+..72/1004/54.5/5 Jul 2009 599ebay.com
10.
 
Nikon D5000..+ +..75/1004/54.5/5 Apr 2009 749ebay.com
11.
 
Nikon D60..80/100..+ +4/54.5/5 Jan 2008 629ebay.com
12.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
13.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 499ebay.com
14.
 
Olympus XZ-24/5+....4.5/54.5/5 Sep 2012 599ebay.com
15.
 
Panasonic LF13/5+....4/54.5/5 Apr 2013 499ebay.com
16.
 
Sony NEX-5N3/5+ +..79/1004.5/54.5/5 Aug 2011 699ebay.com
17.
 
Sony NEX-C33/5+ +..74/1004.5/54/5 Jun 2011 599ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods 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? 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 D3100 vs Pentax MX-1

    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 D3100 Pentax MX-1
    Camera Type Digital single lens reflex Fixed lens compact camera
    Camera Lens Nikon F mount lenses 28-112mm f/1.8-2.5
    Launch Date August 2010 January 2013
    Launch Price USD 599 USD 499
    Sensor Specs Nikon D3100 Pentax MX-1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor 1/1.7" Sensor
    Sensor Size 23.1 x 15.4 mm 7.6 x 5.7 mm
    Sensor Area 355.74 mm2 43.32 mm2
    Sensor Diagonal 27.8 mm 9.5 mm
    Crop Factor 1.5x 4.5x
    Sensor Resolution 14.2 Megapixels 12 Megapixels
    Image Resolution 4608 x 3072 pixels 4000 x 3000 pixels
    Pixel Pitch 5.01 μm 1.89 μm
    Pixel Density 3.98 MP/cm2 27.70 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/24p Video 1080/30p Video
    ISO Setting 100 - 3,200 ISO 100 - 12,800 ISO
    ISO Boost 100 - 12,800 ISO no Enhancement
    DXO Sensor Quality (score) 67 49
    DXO Color Depth (bits) 22.5 20.4
    DXO Dynamic Range (EV) 11.3 11.3
    DXO Low Light (ISO) 919 208
    Screen Specs Nikon D3100 Pentax MX-1
    Viewfinder Type Optical viewfinder no viewfinder
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.53x
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 230k dots 920k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D3100 Pentax MX-1
    Focus System Phase-detect AF Contrast-detect AF
    Continuous Shooting 3 shutter flaps/s 1 shutter flaps/s
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support no no
    Connectivity Specs Nikon D3100 Pentax MX-1
    External Flash Hotshoe no Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D3100 Pentax MX-1
    Battery Type Nikon EN-EL14 Pentax D-LI106
    Battery Life (CIPA)550 shots per charge290 shots per charge
    Body Dimensions 124 x 96 x 75 mm
    (4.9 x 3.8 x 3.0 in)
    122 x 61 x 51 mm
    (4.8 x 2.4 x 2.0 in)
    Camera Weight 505 g (17.8 oz) 391 g (13.8 oz)
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