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Nikon D3100 versus Nikon D7000

The Nikon D3100 and the Nikon D7000 are two digital cameras that were officially introduced, respectively, in August 2010 and September 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The D3100 has a resolution of 14.2 megapixel, whereas the D7000 provides 16.1 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Nikon D3100 vs Nikon D7000

The physical size and weight of the Nikon D3100 and the Nikon D7000 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the D3100 – represents the basis or 100 percent across all the size and weight measures).

Compare Nikon D3100 vs Nikon D7000
Compare D3100 versus D7000 top
Compare D3100 and D7000 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D7000 is notably larger (16 percent) than the Nikon D3100. Moreover, the D7000 is substantially heavier (54 percent) than the D3100. It is noteworthy in this context that the D7000 is splash and dust-proof, while the D3100 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can find an overview of suitable optics in the Nikon Lens Catalog.

Concerning battery life, the D3100 gets 550 shots out of its EN-EL14 battery, while the D7000 can take 1050 images on a single charge of its EN-EL15 power pack.

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, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Nikon D3100» 4.9 in 3.8 in 3.0 in 17.8 oz 550 n Aug 2010 599- i Nikon D3100
Nikon D7000« 5.2 in 4.1 in 3.0 in 27.5 oz 1050 Y Sep 2010 1,499- i Nikon D7000
Canon 7D« » 5.8 in 4.4 in 2.9 in 30.3 oz 800 Y Sep 2009 1,699- i Canon 7D
Nikon D7500« » 5.4 in 4.1 in 2.9 in 25.4 oz 950 Y Apr 2017 1,299 i i Nikon D7500
Nikon D7100« » 5.4 in 4.2 in 3.0 in 27.0 oz 950 Y Feb 2013 1,199- i Nikon D7100
Nikon D3200« » 4.9 in 3.8 in 3.0 in 17.8 oz 540 n Apr 2012 599- i Nikon D3200
Nikon D5100« » 5.0 in 3.8 in 3.1 in 19.8 oz 660 n Apr 2011 749- i Nikon D5100
Nikon D300S« » 5.8 in 4.5 in 3.2 in 33.1 oz 950 Y Jul 2009 1,799- i Nikon D300S
Nikon D3000« » 5.0 in 3.8 in 2.5 in 18.9 oz 500 n Jul 2009 599- i Nikon D3000
Nikon D5000« » 5.0 in 4.1 in 3.1 in 20.8 oz 510 n Apr 2009 749- i Nikon D5000
Nikon D60« » 5.0 in 3.7 in 2.5 in 18.4 oz 500 n Jan 2008 629- i Nikon D60
Nikon D90« » 5.2 in 4.1 in 3.0 in 24.8 oz 850 n Aug 2008 1,299- i Nikon D90
Nikon D40X« » 4.9 in 3.7 in 2.5 in 18.4 oz 520 n Mar 2007 729- i Nikon D40X
Nikon D40« » 4.9 in 3.7 in 2.5 in 18.4 oz 470 n Nov 2006 499- i Nikon D40
Sony NEX-5N« » 4.4 in 2.3 in 1.5 in 9.5 oz 460 n Aug 2011 699- i Sony NEX-5N
Sony NEX-C3« » 4.3 in 2.4 in 1.3 in 7.9 oz 400 n Jun 2011 599- i Sony NEX-C3

The price is, of course, an important factor in any camera decision. 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 D3100 was launched at a markedly lower price (by 60 percent) than the D7000, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. 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: Nikon D3100 vs Nikon D7000

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

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the D7000 is 4 percent bigger. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D3100 and Nikon D7000 sensor measures

With 16.1MP, the D7000 offers a higher resolution than the D3100 (14.2MP), but the D7000 has smaller individual pixels (pixel pitch of 4.80μm versus 5.01μm for the D3100). It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation.

D3100 versus D7000 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 consideration, the D7000 offers substantially better image quality than the D3100 (overall score 13 points higher). The advantage is based on 1 bits higher color depth, 2.6 EV in additional dynamic range, and 0.3 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Nikon D3100» APS-C 14.2 4608 30721080/24p22.511.391967Nikon D3100
Nikon D7000« APS-C 16.1 4928 326410800/24p23.513.9116780Nikon D7000
Canon 7D« » APS-C 17.9 5184 34561080/30p22.011.785466Canon 7D
Nikon D7500« » APS-C 20.7 5568 37124K/30p24.314.0148386Nikon D7500
Nikon D7100« » APS-C 24.0 6000 40001080/60p24.213.7125683Nikon D7100
Nikon D3200« » APS-C 24.1 6016 40001080/30p24.113.2113181Nikon D3200
Nikon D5100« » APS-C 16.1 4928 32641080/30p23.513.6118380Nikon D5100
Nikon D300S« » APS-C 12.2 4288 2848720/24p22.512.278770Nikon D300S
Nikon D3000« » APS-C 10.0 3872 2592-22.311.156362Nikon D3000
Nikon D5000« » APS-C 12.2 4288 2848720/24p22.712.586872Nikon D5000
Nikon D60« » APS-C 10.0 3872 2592-22.511.456265Nikon D60
Nikon D90« » APS-C 12.2 4288 2848720/24p22.712.597773Nikon D90
Nikon D40X« » APS-C 10.0 3872 2592-22.411.451663Nikon D40X
Nikon D40« » APS-C 6.0 3008 2000-21.011.056156Nikon D40
Sony NEX-5N« » APS-C 16.0 4912 32641080/60i23.612.7107977Sony NEX-5N
Sony NEX-C3« » APS-C 16.0 4912 3264720/30p22.712.2108373Sony NEX-C3

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (1080/24p).

 

Feature comparison: Nikon D3100 vs Nikon D7000

Beyond body and sensor, cameras can and do differ across a range of features. The D3100 and the D7000 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 following table reports on some other key feature differences and similarities of the Nikon D3100, the Nikon D7000, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Nikon D3100»optical n 3.0 230 fixed n 4000 3.0 Y n Nikon D3100
Nikon D7000«optical Y 3.0 921 fixed n 8000 6.0 Y n Nikon D7000
Canon 7D« »optical Y 3.0 920 fixed n 8000 8.0 Y n Canon 7D
Nikon D7500« »optical Y 3.2 922 tilting Y 8000 8.0 Y n Nikon D7500
Nikon D7100« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7100
Nikon D3200« »optical n 3.0 921 fixed n 4000 4.0 Y n Nikon D3200
Nikon D5100« »optical n 3.0 921 swivel n 4000 4.0 Y n Nikon D5100
Nikon D300S« »optical Y 3.0 920 fixed n 8000 7.0 Y n Nikon D300S
Nikon D3000« »optical n 3.0 230 fixed n 4000 3.0 Y n Nikon D3000
Nikon D5000« »optical n 2.7 230 full-flex n 4000 4.0 Y n Nikon D5000
Nikon D60« »optical n 2.5 230 fixed n 4000 3.0 Y n Nikon D60
Nikon D90« »optical Y 3.0 920 fixed n 4000 4.5 Y n Nikon D90
Nikon D40X« »optical n 2.5 230 fixed n 4000 3.0 Y n Nikon D40X
Nikon D40« »optical n 2.5 230 fixed n 4000 2.5 Y n Nikon D40
Sony NEX-5N« »- n 3.0 920 tilting Y 4000 10.0 n n Sony NEX-5N
Sony NEX-C3« »- n 3.0 920 tilting n 4000 5.5 n n Sony NEX-C3

One feature that is present on the D7000, but is missing on the D3100 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

Both the D3100 and the D7000 write their imaging data to SDXC cards. The D7000 features dual card slots, which can be very useful in case a memory card fails. In contrast, the D3100 only has one slot.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Nikon D3100»Ymonomono--mini2.0---Nikon D3100
Nikon D7000«YmonomonoY-mini2.0---Nikon D7000
Canon 7D« »Ymono-Y-mini2.0---Canon 7D
Nikon D7500« »YstereomonoYYmini2.0Y-YNikon D7500
Nikon D7100« »YstereomonoYYmini2.0---Nikon D7100
Nikon D3200« »YmonomonoY-mini2.0---Nikon D3200
Nikon D5100« »YmonomonoY-mini2.0---Nikon D5100
Nikon D300S« »YstereomonoY-mini2.0---Nikon D300S
Nikon D3000« »Y-----2.0---Nikon D3000
Nikon D5000« »Ymonomono--mini2.0---Nikon D5000
Nikon D60« »Y-----2.0---Nikon D60
Nikon D90« »Ymonomono--mini2.0---Nikon D90
Nikon D40X« »Y-----2.0---Nikon D40X
Nikon D40« »Y-----2.0---Nikon D40
Sony NEX-5N« »Ystereomono--mini2.0---Sony NEX-5N
Sony NEX-C3« »Ystereomono--mini2.0---Sony NEX-C3

Both the D3100 and the D7000 have been discontinued, but can regularly be found used on eBay. The D3100 was replaced by the Nikon D3200, while the D7000 was followed by the Nikon D7100.

Review summary: Nikon D3100 vs Nikon D7000

So what is the bottom line? Is the Nikon D3100 better than the Nikon D7000 or vice versa? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Nikon D3100:

  • More compact: Is smaller (124x96mm vs 132x105mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 275g or 35 percent) and hence easier to carry around.
  • More affordable: Was introduced into a lower priced category (60 percent cheaper at launch).


Reasons to prefer the Nikon D7000:

  • More detail: Has more megapixels (16.1 vs 14.2MP), which boosts linear resolution by 7%.
  • Better image quality: Scores substantially higher (13 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (2.6 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.3 stops ISO advantage).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (6 vs 3 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (1050 versus 550) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.

If the count of individual advantages (bullet points above) is taken as a guide, the D7000 is the clear winner of the contest (12 : 3 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.

D3100 03:12 D7000

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the D3100 and the D7000 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. This is why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Nikon D3100»HiRec72/1004.5/55/54.5/5 Aug 2010 599- i Nikon D3100
Nikon D7000«-80/1004.5/55/54.5/5 Sep 2010 1,499- i Nikon D7000
Canon 7D« »HiRec84/1004.5/55/54.5/5 Sep 2009 1,699- i Canon 7D
Nikon D7500« »HiRec86/1005/54.5/54.5/5 Apr 2017 1,299 i i Nikon D7500
Nikon D7100« »HiRec85/1004.5/55/54.5/5 Feb 2013 1,199- i Nikon D7100
Nikon D3200« »HiRec73/1004.5/54.5/54.5/5 Apr 2012 599- i Nikon D3200
Nikon D5100« »HiRec76/1004.5/55/54.5/5 Apr 2011 749- i Nikon D5100
Nikon D300S« »HiRec82/1004/55/54.5/5 Jul 2009 1,799- i Nikon D300S
Nikon D3000« »Rec72/1004/53.5/54.5/5 Jul 2009 599- i Nikon D3000
Nikon D5000« »HiRec75/1004/55/54.5/5 Apr 2009 749- i Nikon D5000
Nikon D60« »80/100HiRec4/5rev4.5/5 Jan 2008 629- i Nikon D60
Nikon D90« »HiRecHiRec4/55/54.5/5 Aug 2008 1,299- i Nikon D90
Nikon D40X« »79/100HiRec4/5rev4/5 Mar 2007 729- i Nikon D40X
Nikon D40« »81/100HiRecrev5/54.5/5 Nov 2006 499- i Nikon D40
Sony NEX-5N« »HiRec79/1004.5/55/54.5/5 Aug 2011 699- i Sony NEX-5N
Sony NEX-C3« »HiRec74/1004.5/54.5/54/5 Jun 2011 599- i Sony NEX-C3

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

 

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please send me an email, and I will try to add information on that model to the database.

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