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Nikon D40 vs Olympus E-P3

The Nikon D40 and the Olympus PEN E-P3 are two digital cameras that were officially introduced, respectively, in November 2006 and June 2011. The D40 is a DSLR, while the E-P3 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D40) and a Four Thirds (E-P3) sensor. The Nikon has a resolution of 6 megapixels, whereas the Olympus provides 12.2 MP.

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

Headline Specifications
Nikon D40 versus Olympus E-P3
Nikon D40 Olympus E-P3
Digital single lens reflex Mirrorless system camera
Nikon F mount lenses Micro Four Thirds lenses
6 MP, APS-C Sensor 12.2 MP, Four Thirds Sensor
no Video 1080/60i Video
ISO 200-1,600 (200 - 3,200) ISO 200-12,800
Optical viewfinder Viewfinder optional
2.5 LCD, 230k dots 3.0 LCD, 614k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
2.5 shutter flaps per second 3 shutter flaps per second
Lens stabilization onlyIn-body stabilization
470 shots per battery charge330 shots per battery charge
124 x 94 x 64 mm, 522 g 122 x 69 x 34 mm, 369 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D40 and the Olympus PEN E-P3? 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 D40 and the Olympus E-P3 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 size dimensions are rounded to the nearest millimeter.

The E-P3 can be obtained in three different colors (black, silver, white), while the D40 is only available in black.

Size Nikon D40 vs Olympus E-P3
Compare D40 versus E-P3 top
Comparison D40 or E-P3 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-P3 is notably smaller (28 percent) than the Nikon D40. Moreover, the E-P3 is markedly lighter (29 percent) than the D40. In this context, it is worth noting that neither the D40 nor the E-P3 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D40) and the Micro Four Thirds Lens Catalog (E-P3). Mirrorless cameras, such as the E-P3, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the D40 gets 470 shots out of its EN-EL9 battery, while the E-P3 can take 330 images on a single charge of its BLS-5 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499i
 
Olympus E-P3 122 mm 69 mm 34 mm 369 g 330 n Jun 2011 799i
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499i
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499i
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599i
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599i
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599i
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729i
 
Nikon D80 132 mm 103 mm 77 mm 668 g 600 n Aug 2006 999i
 
Nikon D50 133 mm 102 mm 76 mm 620 g 400 n Apr 2005 749i
 
Nikon D70s 140 mm 111 mm 78 mm 679 g 500 n Apr 2005 899i
 
Olympus E-PL2 114 mm 72 mm 42 mm 362 g 280 n Jan 2011 599i
 
Olympus E-PL3 110 mm 64 mm 37 mm 313 g 300 n Jun 2011 599i
 
Olympus E-PL1 115 mm 72 mm 42 mm 334 g 290 n Feb 2010 599i
 
Olympus E-P1 121 mm 70 mm 36 mm 355 g 300 n Jun 2009 799i
 
Olympus E-P2 121 mm 70 mm 36 mm 355 g 300 n Nov 2009 799i
 
Panasonic L10 135 mm 96 mm 78 mm 556 g 450 n Aug 2007 599i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

Any camera decision will naturally be influenced heavily by the price. 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 D40 was launched at a markedly lower price (by 38 percent) than the E-P3, 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.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 D40 features an APS-C sensor and the Olympus E-P3 a Four Thirds sensor. The sensor area in the E-P3 is 39 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the D40 has a native 3:2 aspect ratio, while the one in the E-P3 offers a 4:3 aspect.

Nikon D40 and Olympus E-P3 sensor measures

Despite having a smaller sensor, the E-P3 offers a higher resolution of 12.2 megapixels, compared with 6 MP of the D40. 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 4.29μm versus 7.85μm for the D40). However, it should be noted that the E-P3 is much more recent (by 4 years and 7 months) than the D40, 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 Olympus E-P3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-P3 for good quality output (200 dots per inch) amounts to 20.2 x 15.1 inches or 51.2 x 38.4 cm, for very good quality (250 dpi) 16.1 x 12.1 inches or 41 x 30.7 cm, and for excellent quality (300 dpi) 13.4 x 10.1 inches or 34.1 x 25.6 cm. The corresponding values for the Nikon D40 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 D40 has a native sensitivity range from ISO 200 to ISO 1600, which can be extended to ISO 200-3200. The corresponding ISO settings for the Olympus PEN E-P3 are ISO 200 to ISO 12800 (no boost).

D40 versus E-P3 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 D40 has a notably higher overall DXO score than the E-P3 (overall score 5 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.2 bits higher color depth, 0.9 EV in additional dynamic range, and 0.1 stops in additional low light sensitivity. 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
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
 
Olympus E-P3 Four Thirds 12.2 4032 30241080/60i20.810.153651
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
 
Nikon D80 APS-C 10.0 3872 2592none22.111.252461
 
Nikon D50 APS-C 6.0 3008 2000none20.910.856055
 
Nikon D70s APS-C 6.0 3008 2000none20.410.352950
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
 
Olympus E-PL3 Four Thirds 12.2 4032 30241080/60i20.910.349952
 
Olympus E-PL1 Four Thirds 12.2 4032 3024720/30p21.510.148754
 
Olympus E-P1 Four Thirds 12.2 4032 3024720/30p21.410.453655
 
Olympus E-P2 Four Thirds 12.2 4032 3024720/30p21.510.450556
 
Panasonic L10 Four Thirds 10.0 3648 2736none21.310.842955

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The E-P3 indeed provides for movie recording, while the D40 does not. The highest resolution format that the E-P3 can use is 1080/60i.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the D40 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the E-P3 relies on live view and the rear LCD for framing. That said, the E-P3 can be equipped with an optional viewfinder – the VF-3. The adjacent table lists some of the other core features of the Nikon D40 and Olympus E-P3 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
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
 
Nikon D40optical n 2.5 230 fixed n 1/4000s 2.5 Y n
 
Olympus E-P3optional n 3.0 614 fixed Y 1/4000s 3.0 Y Y
 
Nikon D3400optical n 3.0 921 fixed n 1/4000s 5.0 Y n
 
Nikon D3300optical n 3.0 921 fixed n 1/4000s 5.0 Y n
 
Nikon D3200optical n 3.0 921 fixed n 1/4000s 4.0 Y n
 
Nikon D3100optical n 3.0 230 fixed n 1/4000s 3.0 Y n
 
Nikon D3000optical n 3.0 230 fixed n 1/4000s 3.0 Y n
 
Nikon D40Xoptical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Nikon D80optical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Nikon D50optical n 2.0 130 fixed n 1/4000s 2.5 Y n
 
Nikon D70soptical n 2.0 130 fixed n 1/8000s 3.0 Y n
 
Olympus E-PL2optional n 3.0 460 fixed n 1/4000s 3.0 Y Y
 
Olympus E-PL3optional n 3.0 460 tilting n 1/4000s 5.5 n Y
 
Olympus E-PL1optional n 2.7 230 fixed n 1/2000s 3.0 Y Y
 
Olympus E-P1none n 3.0 230 fixed n 1/4000s 3.0 n Y
 
Olympus E-P2optional n 3.0 230 fixed n 1/4000s 3.0 n Y
 
Panasonic L10optical n 2.5 207 swivel n 1/4000s 3.0 Y n

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-P3 has a touchscreen, while the D40 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The D40 writes its imaging data to SDHC cards, while the E-P3 uses SDXC cards. The E-P3 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D40 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 D40 and Olympus PEN E-P3 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
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
 
Nikon D40Y-----2.0---
 
Olympus E-P3Ystereo---mini2.0---
 
Nikon D3400Ymonomono--mini2.0--Y
 
Nikon D3300YmonomonoY-mini2.0---
 
Nikon D3200YmonomonoY-mini2.0---
 
Nikon D3100Ymonomono--mini2.0---
 
Nikon D3000Y-----2.0---
 
Nikon D40XY-----2.0---
 
Nikon D80Y-----2.0---
 
Nikon D50Y-----2.0---
 
Nikon D70sY-----2.0---
 
Olympus E-PL2Ystereo---mini2.0---
 
Olympus E-PL3Ystereo---mini2.0---
 
Olympus E-PL1Ystereo---mini2.0---
 
Olympus E-P1Ystereo---mini2.0---
 
Olympus E-P2Ystereo---mini2.0---
 
Panasonic L10Y-----2.0---

Both the D40 and the E-P3 have been discontinued, but can regularly be found used on eBay. The D40 was replaced by the Nikon D40X, while the E-P3 was followed by the Olympus E-P5. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Olympus websites.

Review summary

So how do things add up? Which of the two cameras – the Nikon D40 or the Olympus E-P3 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Nikon D40:

  • Better image quality: Scores markedly higher (5 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (0.9 EV of extra DR).
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Longer lasting: Can take more shots (470 versus 330) on a single battery charge.
  • More affordable: Was introduced into a lower priced category (38 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in November 2006).

ilogo

Arguments in favor of the Olympus PEN E-P3:

  • More detail: Has more megapixels (12.2 vs 6MP), which boosts linear resolution by 40%.
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (614k vs 230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (3 vs 2.5 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (122x69mm vs 124x94mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 153g or 29 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 4 years and 7 months of technical progress since the D40 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the E-P3 is the clear winner of the contest (12 : 6 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. 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.

D40 06:12 E-P3

How about other alternatives? Do the specifications of the Nikon D40 and the Olympus E-P3 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings 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 D40 or the E-P3 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 (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.

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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Nikon D4081/100+ +o5/54.5/5 Nov 2006 499i
 
Olympus E-P383/10074/1004.5/54.5/54.5/5 Jun 2011 799i
 
Nikon D3400+76/1004/54.5/54.5/5 Aug 2016 499i
 
Nikon D3300+77/1004.5/54.5/54.5/5 Jan 2014 499i
 
Nikon D3200+ +73/1004.5/54.5/54.5/5 Apr 2012 599i
 
Nikon D3100+ +72/1004.5/55/54.5/5 Aug 2010 599i
 
Nikon D3000+72/1004/53.5/54.5/5 Jul 2009 599i
 
Nikon D40X79/100+ +4/5o4/5 Mar 2007 729i
 
Nikon D80++ +o4.5/54.5/5 Aug 2006 999i
 
Nikon D5078/100+ +4/5o4.5/5 Apr 2005 749i
 
Nikon D70s......o5/5 Apr 2005 899i
 
Olympus E-PL283/10071/1004.5/54.5/54.5/5 Jan 2011 599i
 
Olympus E-PL3+ +72/1004.5/5..4/5 Jun 2011 599i
 
Olympus E-PL186/10069/1004/54.5/54.5/5 Feb 2010 599i
 
Olympus E-P1+66/1004/54/54.5/5 Jun 2009 799i
 
Olympus E-P2+69/1004/54.5/54.5/5 Nov 2009 799i
 
Panasonic L1085/100+3.5/5o4/5 Aug 2007 599i
Notes: (+ +) 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.

Nikon D40:
Check Ebay offers
Olympus E-P3:
Check Ebay offers

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 a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

~

    Specifications: Nikon D40 vs Olympus E-P3

    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 D40 Olympus E-P3
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Nikon F mount lenses Micro Four Thirds lenses
    Launch Date November 2006 June 2011
    Launch Price USD 499 USD 799
    Sensor Specs Nikon D40 Olympus E-P3
    Sensor Technology CCD CMOS
    Sensor Format APS-C Sensor Four Thirds Sensor
    Sensor Size 23.7 x 15.6 mm 17.3 x 13.0 mm
    Sensor Area 369.72 mm2 224.9 mm2
    Sensor Diagonal 28.4 mm 21.6 mm
    Crop Factor 1.5x 2.0x
    Sensor Resolution 6 Megapixels 12.2 Megapixels
    Image Resolution 3008 x 2000 pixels 4032 x 3024 pixels
    Pixel Pitch 7.85 μm 4.29 μm
    Pixel Density 1.63 MP/cm2 5.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 200 - 1,600 ISO 200 - 12,800 ISO
    ISO Boost 200 - 3,200 ISO no Enhancement
    DXO Sensor Quality (score) 56 51
    DXO Color Depth (bits) 21.0 20.8
    DXO Dynamic Range (EV) 11.0 10.1
    DXO Low Light (ISO) 561 536
    Screen Specs Nikon D40 Olympus E-P3
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.53x
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 614k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Nikon D40 Olympus E-P3
    Focus System Phase-detect AF Contrast-detect AF
    Continuous Shooting 2.5 shutter flaps/s 3 shutter flaps/s
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium SDHC cards SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Nikon D40 Olympus E-P3
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D40 Olympus E-P3
    Battery Type EN-EL9 BLS-5
    Battery Life (CIPA)470 shots per charge330 shots per charge
    Body Dimensions 124 x 94 x 64 mm
    (4.9 x 3.7 x 2.5 in)
    122 x 69 x 34 mm
    (4.8 x 2.7 x 1.3 in)
    Camera Weight 522 g (18.4 oz) 369 g (13.0 oz)

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