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Olympus E-400 versus Pentax K-3 II

The Olympus E-400 and the Pentax K-3 II are two digital cameras that were officially introduced, respectively, in September 2006 and April 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a Four Thirds (E-400) and an APS-C sensor. The Olympus has a resolution of 10 megapixel, whereas the Pentax provides 24.1 MP.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Olympus E-400 and the Pentax K-3 II. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the E-400 – represents the basis or 100 percent across all the size and weight measures).

Olympus E-400 vs Pentax K-3 II front
E-400 versus K-3 II top view
E-400 and K-3 II rear side
Body view (E-400 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 II is notably larger (11 percent) than the Olympus E-400. Moreover, the K-3 II is substantially heavier (84 percent) than the E-400. It is noteworthy in this context that the K-3 II is splash and dust-proof, while the E-400 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 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 E-400 gets 500 shots out of its BLS-1 battery, while the K-3 II can take 720 images on a single charge of its D-LI90 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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 comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Olympus E-400 (⇒ rgt) 130 mm 91 mm 53 mm 435 g 500 no 2006 699discont. check
Pentax K-3 II (⇒ lft) 131 mm 100 mm 77 mm 800 g 720 YES 2015 1,099 latest check
Nikon D40X (⇒ lft | rgt) 124 mm 94 mm 64 mm 522 g 520 no 2007 729discont. check
Olympus E-620 (⇒ lft | rgt) 130 mm 94 mm 60 mm 521 g 500 no 2009 699discont. check
Olympus E-450 (⇒ lft | rgt) 130 mm 91 mm 53 mm 440 g 500 no 2009 499discont. check
Olympus E-420 (⇒ lft | rgt) 130 mm 91 mm 53 mm 440 g 500 no 2008 599discont. check
Olympus E-410 (⇒ lft | rgt) 130 mm 91 mm 53 mm 435 g 500 no 2007 699discont. check
Olympus E-510 (⇒ lft | rgt) 136 mm 92 mm 68 mm 538 g 750 no 2007 799discont. check
Olympus E-330 (⇒ lft | rgt) 140 mm 87 mm 72 mm 637 g 750 no 2006 999discont. check
Olympus E-500 (⇒ lft | rgt) 130 mm 95 mm 66 mm 479 g 750 no 2005 599discont. check
Olympus E-300 (⇒ lft | rgt) 147 mm 85 mm 64 mm 624 g 750 no 2004 799discont. check
Panasonic GX8 (⇒ lft | rgt) 133 mm 78 mm 63 mm 487 g 330 YES 2015 1,199discont. check
Panasonic L10 (⇒ lft | rgt) 135 mm 96 mm 78 mm 556 g 450 no 2007 599discont. check
Pentax KP (⇒ lft | rgt) 132 mm 101 mm 76 mm 703 g 390 YES 2017 1,099 latest check
Pentax K-70 (⇒ lft | rgt) 126 mm 93 mm 74 mm 688 g 410 YES 2016 649 latest check
Pentax K-3 (⇒ lft | rgt) 131 mm 100 mm 77 mm 800 g 560 YES 2013 1,299discont. check
Sony RX10 II (⇒ lft | rgt) 129 mm 88 mm 102 mm 813 g 400 YES 2015 1,299discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-400 was launched at a markedly lower price (by 36 percent) than the K-3 II, 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

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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Olympus E-400 features a Four Thirds sensor and the Pentax K-3 II an APS-C sensor. The sensor area in the K-3 II is 63 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the E-400 has a native 4:3 aspect ratio, while the one in the K-3 II offers a 3:2 aspect.

Olympus E-400 and Pentax K-3 II sensor measures
Sensor size

With 24.1MP, the K-3 II offers a higher resolution than the E-400 (10MP), but the K-3 II has smaller individual pixels (pixel pitch of 3.90μm versus 4.74μm for the E-400). Yet, the K-3 II is a much more recent model (by 8 years and 7 months) than the E-400, 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 K-3 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

Unlike the E-400, the K-3 II has the capacity to capture high quality composite images by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

E-400 versus K-3 II MP
Sensor resolution

For most cameras, data on sensor performance has been reported by DXO Mark. 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 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 Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Olympus E-400 (⇒ rgt) Four Thirds 10.0 3648 2736 no - - - -
Pentax K-3 II (⇒ lft) APS-C 24.1 6016 4000 1080/60i 23.6 13.6 1106 80
Nikon D40X (⇒ lft | rgt) APS-C 10.0 3872 2592 no 22.4 11.4 516 63
Olympus E-620 (⇒ lft | rgt) Four Thirds 12.2 4032 3024 no 21.3 10.3 536 55
Olympus E-450 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.5 10.5 512 56
Olympus E-420 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.5 10.4 527 56
Olympus E-410 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.1 10.0 494 51
Olympus E-510 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.2 10.0 442 52
Olympus E-330 (⇒ lft | rgt) Four Thirds 7.4 3136 2352 no - - - -
Olympus E-500 (⇒ lft | rgt) Four Thirds 8.0 3264 2448 no - - - -
Olympus E-300 (⇒ lft | rgt) Four Thirds 8.0 3264 2448 no - - - -
Panasonic GX8 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.5 12.6 806 75
Panasonic L10 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.3 10.8 429 55
Pentax KP (⇒ lft | rgt) APS-C 24.1 6016 4000 1080/60i - - - -
Pentax K-70 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60i - - - -
Pentax K-3 (⇒ lft | rgt) APS-C 24.1 6016 4000 1080/60i 23.7 13.4 1216 80
Sony RX10 II (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 23.0 12.6 531 70

Many modern cameras cannot only take still pictures, but also record videos. The K-3 II indeed provides for movie recording, while the E-400 does not. The highest resolution format that the K-3 II can use is 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The E-400 and the K-3 II 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 table below summarizes some of the other core capabilities of the Olympus E-400 and Pentax K-3 II in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Olympus E-400 (⇒ rgt) optical no 2.5 215 fixed no 4000 3.0 10 no
Pentax K-3 II (⇒ lft) optical YES 3.2 1037 fixed no 8000 8.3 no YES
Nikon D40X (⇒ lft | rgt) optical no 2.5 230 fixed no 4000 3.0 17 no
Olympus E-620 (⇒ lft | rgt) optical no 2.7 230 swivel no 4000 4.0 12 YES
Olympus E-450 (⇒ lft | rgt) optical no 2.7 215 fixed no 4000 3.5 12 no
Olympus E-420 (⇒ lft | rgt) optical no 2.7 215 fixed no 4000 3.5 12 no
Olympus E-410 (⇒ lft | rgt) optical no 2.5 215 fixed no 4000 3.0 10 no
Olympus E-510 (⇒ lft | rgt) optical no 2.5 215 fixed no 4000 3.0 12 YES
Olympus E-330 (⇒ lft | rgt) optical no 2.5 215 tilting no 4000 3.0 13 no
Olympus E-500 (⇒ lft | rgt) optical no 2.5 215 fixed no 4000 2.5 13 no
Olympus E-300 (⇒ lft | rgt) optical no 1.8 134 fixed no 4000 2.5 11 no
Panasonic GX8 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 8000 10.0 no YES
Panasonic L10 (⇒ lft | rgt) optical no 2.5 207 swivel no 4000 3.0 11 no
Pentax KP (⇒ lft | rgt) optical no 3.0 921 tilting no 6000 7.0 YES YES
Pentax K-70 (⇒ lft | rgt) optical no 3.0 921 swivel no 6000 6.0 YES YES
Pentax K-3 (⇒ lft | rgt) optical YES 3.2 1037 fixed no 8000 8.3 13 YES
Sony RX10 II (⇒ lft | rgt) 2359 YES 3.0 1229 tilting no 3200 14.0 10.2 YES

The K-3 II is a current model that online retailers, such as amazon, will have in stock. In contrast, the E-400 has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-400 was succeeded by the Olympus E-410.

Summary

So what conclusions can be drawn? Is the Olympus E-400 better than the Pentax K-3 II or vice versa? The listing below highlights the relative strengths of the two models.


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Advantages of the Olympus E-400:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Less heavy: Is lighter (by 365g or 46 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 (36 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in September 2006).

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Reasons to prefer the Pentax K-3 II:

  • More detail: Has more megapixels (24.1 vs 10MP), which boosts linear resolution by 58%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • Easier setting verification: Has a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 2.5") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 215k dots).
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (8.3 vs 3 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (720 versus 500) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Reflects 8 years and 7 months of technical progress since the E-400 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the K-3 II is the clear winner of the contest (14 : 5 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.

E-400 05:14 K-3 II

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the E-400 or the K-3 II handle or 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. 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. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Olympus E-400 (⇒ rgt) 85/100 - 4/5 - 4/5 2006 699discont. check
Pentax K-3 II (⇒ lft) - - 5/5 4.5/5 5/5 2015 1,099 latest check
Nikon D40X (⇒ lft | rgt) 79/100 HiRec 4/5 reviewed 4/5 2007 729discont. check
Olympus E-620 (⇒ lft | rgt) 88/100 72/100 HiRec 4.5/5 reviewed 5/5 2009 699discont. check
Olympus E-450 (⇒ lft | rgt) - - 4/5 - 4/5 2009 499discont. check
Olympus E-420 (⇒ lft | rgt) 85/100 HiRec 4/5 reviewed 4.5/5 2008 599discont. check
Olympus E-410 (⇒ lft | rgt) 86/100 HiRec 4/5 reviewed 4.5/5 2007 699discont. check
Olympus E-510 (⇒ lft | rgt) 89/100 HiRec 3.5/5 reviewed 4.5/5 2007 799discont. check
Olympus E-330 (⇒ lft | rgt) - Rec reviewed 3.5/5 - 2006 999discont. check
Olympus E-500 (⇒ lft | rgt) 76/100 HiRec - - - 2005 599discont. check
Olympus E-300 (⇒ lft | rgt) - Rec reviewed reviewed 4.5/5 2004 799discont. check
Panasonic GX8 (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 5/5 4.5/5 2015 1,199discont. check
Panasonic L10 (⇒ lft | rgt) 85/100 Rec 3.5/5 reviewed 4/5 2007 599discont. check
Pentax KP (⇒ lft | rgt) - 82/100 Silver 5/5 - 4.5/5 2017 1,099 latest check
Pentax K-70 (⇒ lft | rgt) - 79/100 Silver 4.5/5 4/5 4.5/5 2016 649 latest check
Pentax K-3 (⇒ lft | rgt) - 83/100 Gold 5/5 4.5/5 5/5 2013 1,299discont. check
Sony RX10 II (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 4/5 2015 1,299discont. check

The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. 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.

Other comparisons

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. If you do not see the camera that you are looking for, kindly get in touch, and I will try to add information on that model to the database.

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