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Nikon D3100 vs D70s

The Nikon D3100 and the Nikon D70s are two digital cameras that were announced, respectively, in August 2010 and April 2005. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The D3100 has a resolution of 14.2 megapixels, whereas the D70s provides 6 MP.

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

Headline Specifications
Nikon D3100   Nikon D70s
Nikon D3100 Nikon D70s
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Nikon F mount lenses
14.2 MP, APS-C Sensor 6 MP, APS-C Sensor
1080/24p Video no Video
ISO 100-3200 (100-12800) ISO 200-1600
Optical viewfinder Optical viewfinder
3.0" LCD, 230k dots 2.0" LCD, 130k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
3 shutter flaps per second 3 shutter flaps per second
550 shots per battery charge500 shots per battery charge
124 x 96 x 75 mm, 505 g 140 x 111 x 78 mm, 679 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Nikon D70s? 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: Nikon D3100 vs D70s

The side-by-side display below illustrates the physical size and weight of the Nikon D3100 and the Nikon D70s. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The D3100 can be obtained in two different colors (black, red), while the D70s is only available in black.

Size Nikon D3100 vs Nikon D70s
Compare D3100 versus D70s top
Comparison D3100 or D70s rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D70s is notably larger (31 percent) than the Nikon D3100. Moreover, the D70s is markedly heavier (34 percent) than the D3100. In this context, it is worth noting that neither the D3100 nor the D70s are weather-sealed.

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 compare the optics available in the Nikon Lens Catalog.

Concerning battery life, the D3100 gets 550 shots out of its EN-EL14 battery, while the D70s can take 500 images on a single charge of its EN-EL3a power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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 D70s« 5.5 in 4.4 in 3.1 in 24.0 oz 500 n Apr 2005 899- i Nikon D70s
 
Nikon D5300« » 4.9 in 3.9 in 3.0 in 16.9 oz 600 n Oct 2013 799- i Nikon D5300
 
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 D7000« » 5.2 in 4.1 in 3.0 in 27.5 oz 1050 Y Sep 2010 1,499- i Nikon D7000
 
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 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
 
Nikon D80« » 5.2 in 4.1 in 3.0 in 23.6 oz 600 n Aug 2006 999- i Nikon D80
 
Nikon D50« » 5.2 in 4.0 in 3.0 in 21.9 oz 400 n Apr 2005 749- i Nikon D50
 
Nikon D70« » 5.5 in 4.4 in 3.1 in 24.0 oz 400 n Jan 2004 999- i Nikon D70
 
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
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D3100 was launched at a markedly lower price (by 33 percent) than the D70s, 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.

 

Sensor comparison: Nikon D3100 vs D70s

The size of the imaging sensor is a crucial determinant 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 tend to be associated with larger, more expensive camera bodies and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the D70s 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 D70s sensor measures

Despite having a slightly smaller sensor, the Nikon D3100 offers a higher resolution of 14.2 megapixels, compared with 6 MP of the Nikon D70s. 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 5.01μm versus 7.85μm for the D70s). However, it should be noted that the D3100 is much more recent (by 5 years and 4 months) than the D70s, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

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 inch or 58.5 x 39 cm, for very good quality (250 dpi) 18.4 x 12.3 inch or 46.8 x 31.2 cm, and for excellent quality (300 dpi) 15.4 x 10.2 inch or 39 x 26 cm. The corresponding values for the Nikon D70s are 15 x 10 inch or 38.2 x 25.4 cm for good quality, 12 x 8 inch or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inch or 25.5 x 16.9 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 Nikon D70s are ISO 200 to ISO 1600 (no boost).

D3100 versus D70s MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). Of the two cameras under review, the D3100 provides substantially higher image quality than the D70s, with an overall score that is 17 points higher. This advantage is based on 2.1 bits higher color depth, 1 EV in additional dynamic range, and 0.8 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 D70s« APS-C 6.0 3008 2000-20.410.352950Nikon D70s
 
Nikon D5300« » APS-C 24.0 6000 40001080/60p24.013.9133883Nikon D5300
 
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 D7000« » APS-C 16.1 4928 326410800/24p23.513.9116780Nikon D7000
 
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 D40X« » APS-C 10.0 3872 2592-22.411.451663Nikon D40X
 
Nikon D40« » APS-C 6.0 3008 2000-21.011.056156Nikon D40
 
Nikon D80« » APS-C 10.0 3872 2592-22.111.252461Nikon D80
 
Nikon D50« » APS-C 6.0 3008 2000-20.910.856055Nikon D50
 
Nikon D70« » APS-C 6.0 3008 2000-20.410.352950Nikon D70
 
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 are not only capable of taking still images, but can also record movies. The D3100 indeed provides movie recording capabilities, while the D70s does not. The highest resolution format that the D3100 can use is 1080/24p.

 

Feature comparison: Nikon D3100 vs D70s

Apart from body and sensor, cameras can and do differ across a range of features. The D3100 and the D70s 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 viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the D3100 has a higher magnification than the one of the D70s (0.53x vs 0.50x), 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 D3100 and Nikon D70s in connection with corresponding information for a sample of similar cameras.

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)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Nikon D3100»optical n 3.0 230 fixed n 1/4000s 3.0 Y n Nikon D3100
 
Nikon D70s«optical n 2.0 130 fixed n 1/8000s 3.0 Y n Nikon D70s
 
Nikon D5300« »optical n 3.2 1037 swivel n 1/4000s 5.0 Y n Nikon D5300
 
Nikon D3200« »optical n 3.0 921 fixed n 1/4000s 4.0 Y n Nikon D3200
 
Nikon D5100« »optical n 3.0 921 swivel n 1/4000s 4.0 Y n Nikon D5100
 
Nikon D7000« »optical Y 3.0 921 fixed n 1/8000s 6.0 Y n Nikon D7000
 
Nikon D3000« »optical n 3.0 230 fixed n 1/4000s 3.0 Y n Nikon D3000
 
Nikon D5000« »optical n 2.7 230 full-flex n 1/4000s 4.0 Y n Nikon D5000
 
Nikon D60« »optical n 2.5 230 fixed n 1/4000s 3.0 Y n Nikon D60
 
Nikon D40X« »optical n 2.5 230 fixed n 1/4000s 3.0 Y n Nikon D40X
 
Nikon D40« »optical n 2.5 230 fixed n 1/4000s 2.5 Y n Nikon D40
 
Nikon D80« »optical n 2.5 230 fixed n 1/4000s 3.0 Y n Nikon D80
 
Nikon D50« »optical n 2.0 130 fixed n 1/4000s 2.5 Y n Nikon D50
 
Nikon D70« »optical n 1.8 130 fixed n 1/8000s 3.0 Y n Nikon D70
 
Sony NEX-5N« »- n 3.0 920 tilting Y 1/4000s 10.0 n n Sony NEX-5N
 
Sony NEX-C3« »- n 3.0 920 tilting n 1/4000s 5.5 n n Sony NEX-C3

The D3100 writes its imaging data to SDXC cards, while the D70s uses Compact Flash cards.

 

Connectivity comparison: Nikon D3100 vs D70s

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 Nikon D70s and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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 D70s«Y-----2.0---Nikon D70s
 
Nikon D5300« »YstereomonoY-mini2.0Y--Nikon D5300
 
Nikon D3200« »YmonomonoY-mini2.0---Nikon D3200
 
Nikon D5100« »YmonomonoY-mini2.0---Nikon D5100
 
Nikon D7000« »YmonomonoY-mini2.0---Nikon D7000
 
Nikon D3000« »Y-----2.0---Nikon D3000
 
Nikon D5000« »Ymonomono--mini2.0---Nikon D5000
 
Nikon D60« »Y-----2.0---Nikon D60
 
Nikon D40X« »Y-----2.0---Nikon D40X
 
Nikon D40« »Y-----2.0---Nikon D40
 
Nikon D80« »Y-----2.0---Nikon D80
 
Nikon D50« »Y-----2.0---Nikon D50
 
Nikon D70« »Y-----1.0---Nikon D70
 
Sony NEX-5N« »Ystereomono--mini2.0---Sony NEX-5N
 
Sony NEX-C3« »Ystereomono--mini2.0---Sony NEX-C3

Both the D3100 and the D70s have been discontinued, but can regularly be found used on eBay. The D70s was replaced by the Nikon D80, while the D3100 was followed by the Nikon D3200. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon website.


Review summary: Nikon D3100 vs D70s

So what is the bottom line? Is there a clear favorite between the Nikon D3100 and the Nikon D70s? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.


Advantages of the Nikon D3100:

  • More detail: Offers more megapixels (14.2 vs 6MP) with a 53% higher linear resolution.
  • Better image quality: Scores substantially higher (17 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (2.1 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (0.8 stops ISO advantage).
  • Broader imaging potential: Can record not only still images but also 1080/24p movies.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.53x vs 0.50x).
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (230k vs 130k dots).
  • More compact: Is smaller (124x96mm vs 140x111mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 174g or 26 percent) and hence easier to carry around.
  • More affordable: Was introduced into a lower priced category (33 percent cheaper at launch).
  • More modern: Reflects 5 years and 4 months of technical progress since the D70s launch.


Reasons to prefer the Nikon D70s:

  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • More heavily discounted: Has been around for much longer (launched in April 2005).

If the count of relative strengths (bullet points above) is taken as a measure, the D3100 is the clear winner of the match-up (13 : 2 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D3100 13:02 D70s

How about other alternatives? Do the specifications of the Nikon D3100 and the Nikon D70s 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 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 D70s 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: Nikon D3100 vs D70s

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 (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

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»+ +72/1004.5/55/54.5/5 Aug 2010 599- i Nikon D3100
 
Nikon D70s«---o5/5 Apr 2005 899- i Nikon D70s
 
Nikon D5300« »+ +79/1004.5/54.5/54.5/5 Oct 2013 799- i Nikon D5300
 
Nikon D3200« »+ +73/1004.5/54.5/54.5/5 Apr 2012 599- i Nikon D3200
 
Nikon D5100« »+ +76/1004.5/55/54.5/5 Apr 2011 749- i Nikon D5100
 
Nikon D7000« »-80/1004.5/55/54.5/5 Sep 2010 1,499- i Nikon D7000
 
Nikon D3000« »+72/1004/53.5/54.5/5 Jul 2009 599- i Nikon D3000
 
Nikon D5000« »+ +75/1004/55/54.5/5 Apr 2009 749- i Nikon D5000
 
Nikon D60« »80/100+ +4/5o4.5/5 Jan 2008 629- i Nikon D60
 
Nikon D40X« »79/100+ +4/5o4/5 Mar 2007 729- i Nikon D40X
 
Nikon D40« »81/100+ +o5/54.5/5 Nov 2006 499- i Nikon D40
 
Nikon D80« »++ +o4.5/54.5/5 Aug 2006 999- i Nikon D80
 
Nikon D50« »78/100+ +4/5o4.5/5 Apr 2005 749- i Nikon D50
 
Nikon D70« »-+ +-o- Jan 2004 999- i Nikon D70
 
Sony NEX-5N« »+ +79/1004.5/55/54.5/5 Aug 2011 699- i Sony NEX-5N
 
Sony NEX-C3« »+ +74/1004.5/54.5/54/5 Jun 2011 599- i Sony NEX-C3
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

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 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.

Nikon D3100:
Check Ebay offers
Nikon D70s:
Check Ebay offers

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 make a corresponding selection in the search boxes 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 D3100 vs Nikon D70s

    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 Nikon D70s
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Nikon F mount lenses
    Launch Date August 2010 April 2005
    Launch Price USD 599 USD 899
    Sensor Specs Nikon D3100 Nikon D70s
    Sensor Technology CMOS CCD
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 23.1 x 15.4 mm 23.7 x 15.6 mm
    Sensor Area 355.74 mm2 369.72 mm2
    Sensor Diagonal 27.8 mm 28.4 mm
    Crop Factor 1.5x 1.5x
    Sensor Resolution 14.2 Megapixels 6 Megapixels
    Image Resolution 4608 x 3072 pixels 3008 x 2000 pixels
    Pixel Pitch 5.01 μm 7.85 μm
    Pixel Density 3.98 MP/cm2 1.63 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/24p Video no Video
    ISO Setting 100-3200 ISO 200-1600 ISO
    ISO Boost 100-12800 ISO no Enhancement
    DXO Sensor Quality (score) 67 50
    DXO Color Depth (bits) 22.5 20.4
    DXO Dynamic Range (EV) 11.3 10.3
    DXO Low Light (ISO) 919 529
    Screen Specs Nikon D3100 Nikon D70s
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 95%
    Viewfinder Magnification 0.53x 0.50x
    LCD Framing Live View
    Rear LCD Size 3.0 inch 2.0 inch
    LCD Resolution 230k dots 130k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Nikon D3100 Nikon D70s
    Autofocus System Phase-detect AF Phase-detect AF
    Continuous Shooting 3 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy100 000 actuations50 000 actuations
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium SDXC cards CF cards
    Second Storage Option Single card slot Single card slot
    Connectivity Specs Nikon D3100 Nikon D70s
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D3100 Nikon D70s
    Battery Type EN-EL14 power pack EN-EL3a power pack
    Battery Life (CIPA)550 shots per charge500 shots per charge
    Body Dimensions 124 x 96 x 75 mm
    (4.9 x 3.8 x 3.0 in)
    140 x 111 x 78 mm
    (5.5 x 4.4 x 3.1 in)
    Camera Weight 505 g (17.8 oz) 679 g (24.0 oz)

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