Olympus E-30 vs Pentax K-3
The Olympus E-30 and the Pentax K-3 are two enthusiast cameras that were officially introduced, respectively, in November 2008 and October 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a Four Thirds (E-30) and an APS-C (K-3) sensor. The Olympus has a resolution of 12.2 megapixels, whereas the Pentax provides 24.1 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Olympus E-30||Pentax K-3|
|Digital single lens reflex||Digital single lens reflex|
|Four Thirds lenses||Pentax K mount lenses|
|12.2 MP, Four Thirds Sensor||24.1 MP, APS-C Sensor|
|no Video||1080/60i Video|
|ISO 100-3200||ISO 100-51200|
|Optical viewfinder||Optical viewfinder|
|2.7" LCD, 230k dots||3.2" LCD, 1037k dots|
|Swivel screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|5 shutter flaps per second||8.3 shutter flaps per second|
|In-body stabilization||In-body stabilization|
|Not weather sealed||Weathersealed body|
|750 shots per battery charge||560 shots per battery charge|
|142 x 108 x 75 mm, 701 g||131 x 100 x 77 mm, 800 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-30 and the Pentax K-3? 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.
An illustration of the physical size and weight of the Olympus E-30 and the Pentax K-3 is provided in the side-by-side display below. 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 dimensions are rounded to the nearest millimeter.
The K-3 can be obtained in two different colors (black, silver), while the E-30 is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 is notably smaller (15 percent) than the Olympus E-30. However, the K-3 is markedly heavier (14 percent) than the E-30. It is noteworthy in this context that the K-3 is splash and dust-proof, while the E-30 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 and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
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 camera comparisons there.
|Olympus E-30»||142 mm||108 mm||75 mm||701 g||750||n||Nov 2008||1,299||Olympus E-30|
|Pentax K-3«||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299||Pentax K-3|
|Canon 70D« »||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199||Canon 70D|
|Nikon D7100« »||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199||Nikon D7100|
|Olympus E-450« »||130 mm||91 mm||53 mm||440 g||500||n||Mar 2009||499||Olympus E-450|
|Olympus E-600« »||130 mm||94 mm||60 mm||535 g||500||n||Aug 2009||449||Olympus E-600|
|Olympus E-620« »||130 mm||94 mm||60 mm||521 g||500||n||Feb 2009||699||Olympus E-620|
|Olympus E-P1« »||121 mm||70 mm||36 mm||355 g||300||n||Jun 2009||799||Olympus E-P1|
|Olympus E-P2« »||121 mm||70 mm||36 mm||355 g||300||n||Nov 2009||799||Olympus E-P2|
|Olympus E-420« »||130 mm||91 mm||53 mm||440 g||500||n||Mar 2008||599||Olympus E-420|
|Olympus E-520« »||136 mm||92 mm||68 mm||535 g||750||n||May 2008||699||Olympus E-520|
|Olympus E-3« »||142 mm||116 mm||75 mm||876 g||750||Y||Oct 2007||1,699||Olympus E-3|
|Olympus E-410« »||130 mm||91 mm||53 mm||435 g||500||n||Mar 2007||699||Olympus E-410|
|Olympus E-510« »||136 mm||92 mm||68 mm||538 g||750||n||Mar 2007||799||Olympus E-510|
|Pentax KP« »||132 mm||101 mm||76 mm||703 g||390||Y||Jan 2017||1,099||Pentax KP|
|Pentax K-3 II« »||131 mm||100 mm||77 mm||800 g||720||Y||Apr 2015||1,099||Pentax K-3 II|
|Pentax K-5« »||131 mm||97 mm||73 mm||760 g||740||Y||Sep 2010||1,099||Pentax K-5|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. 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 two cameras under review were launched at the same price and fall into the same 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.
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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.
Of the two cameras under consideration, the Olympus E-30 features a Four Thirds sensor and the Pentax K-3 an APS-C sensor. The sensor area in the K-3 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-30 has a native 4:3 aspect ratio, while the one in the K-3 offers a 3:2 aspect.
With 24.1MP, the K-3 offers a higher resolution than the E-30 (12.2MP), but the K-3 has smaller individual pixels (pixel pitch of 3.90μm versus 4.29μm for the E-30). Yet, the K-3 is a much more recent model (by 4 years and 11 months) than the E-30, 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 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Pentax K-3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-3 for good quality output (200 dots per inch) amounts to 30.1 x 20 inch or 76.4 x 50.8 cm, for very good quality (250 dpi) 24.1 x 16 inch or 61.1 x 40.6 cm, and for excellent quality (300 dpi) 20.1 x 13.3 inch or 50.9 x 33.9 cm. The corresponding values for the Olympus E-30 are 20.2 x 15.1 inch or 51.2 x 38.4 cm for good quality, 16.1 x 12.1 inch or 41 x 30.7 cm for very good quality, and 13.4 x 10.1 inch or 34.1 x 25.6 cm for excellent quality prints.
The Olympus E-30 has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Pentax K-3 are ISO 100 to ISO 51200 (no boost).
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. Of the two cameras under consideration, the K-3 offers substantially better image quality than the E-30 (overall score 25 points higher). The advantage is based on 2.4 bits higher color depth, 3 EV in additional dynamic range, and 1.2 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.
|Olympus E-30||Four Thirds||12.2||4032||3024||none||21.3||10.4||530||55||Olympus E-30|
|Pentax K-3||APS-C||24.1||6016||4000||1080/60i||23.7||13.4||1216||80||Pentax K-3|
|Canon 70D||APS-C||20.0||5472||3648||1080/30p||22.5||11.6||926||68||Canon 70D|
|Nikon D7100||APS-C||24.0||6000||4000||1080/60p||24.2||13.7||1256||83||Nikon D7100|
|Olympus E-450||Four Thirds||10.0||3648||2736||none||21.5||10.5||512||56||Olympus E-450|
|Olympus E-600||Four Thirds||12.2||4032||3024||none||21.5||10.3||541||55||Olympus E-600|
|Olympus E-620||Four Thirds||12.2||4032||3024||none||21.3||10.3||536||55||Olympus E-620|
|Olympus E-P1||Four Thirds||12.2||4032||3024||720/30p||21.4||10.4||536||55||Olympus E-P1|
|Olympus E-P2||Four Thirds||12.2||4032||3024||720/30p||21.5||10.4||505||56||Olympus E-P2|
|Olympus E-420||Four Thirds||10.0||3648||2736||none||21.5||10.4||527||56||Olympus E-420|
|Olympus E-520||Four Thirds||10.0||3648||2736||none||21.4||10.4||548||55||Olympus E-520|
|Olympus E-3||Four Thirds||10.0||3648||2736||none||21.6||10.5||571||56||Olympus E-3|
|Olympus E-410||Four Thirds||10.0||3648||2736||none||21.1||10.0||494||51||Olympus E-410|
|Olympus E-510||Four Thirds||10.0||3648||2736||none||21.2||10.0||442||52||Olympus E-510|
|Pentax KP||APS-C||24.1||6016||4000||1080/60i||..||..||..||..||Pentax KP|
|Pentax K-3 II||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80||Pentax K-3 II|
|Pentax K-5||APS-C||16.1||4928||3264||1080/25p||23.7||14.1||1162||82||Pentax K-5|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The K-3 indeed provides for movie recording, while the E-30 does not. The highest resolution format that the K-3 can use is 1080/60i.
Beyond body and sensor, cameras can and do differ across a range of features. The E-30 and the K-3 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 viewfinder in the K-3 offers a wider field of view (100%) than the one in the E-30 (98%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the K-3 has a higher magnification (0.63x vs 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Olympus E-30 and Pentax K-3 along with similar information for a selection of comparators.
|Olympus E-30||optical||Y||2.7||230||swivel||n||1/8000s||5.0||Y||Y||Olympus E-30|
|Pentax K-3||optical||Y||3.2||1037||fixed||n||1/8000s||8.3||Y||Y||Pentax K-3|
|Canon 70D||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 70D|
|Nikon D7100||optical||Y||3.2||1229||fixed||n||1/8000s||6.0||Y||n||Nikon D7100|
|Olympus E-450||optical||n||2.7||215||fixed||n||1/4000s||3.5||Y||n||Olympus E-450|
|Olympus E-600||optical||n||2.7||230||swivel||n||1/4000s||4.0||Y||Y||Olympus E-600|
|Olympus E-620||optical||n||2.7||230||swivel||n||1/4000s||4.0||Y||Y||Olympus E-620|
|Olympus E-P1||none||n||3.0||230||fixed||n||1/4000s||3.0||n||Y||Olympus E-P1|
|Olympus E-P2||optional||n||3.0||230||fixed||n||1/4000s||3.0||n||Y||Olympus E-P2|
|Olympus E-420||optical||n||2.7||215||fixed||n||1/4000s||3.5||Y||n||Olympus E-420|
|Olympus E-520||optical||n||2.7||215||fixed||n||1/4000s||3.5||Y||Y||Olympus E-520|
|Olympus E-3||optical||Y||2.5||230||swivel||n||1/8000s||5.0||Y||Y||Olympus E-3|
|Olympus E-410||optical||n||2.5||215||fixed||n||1/4000s||3.0||Y||n||Olympus E-410|
|Olympus E-510||optical||n||2.5||215||fixed||n||1/4000s||3.0||Y||Y||Olympus E-510|
|Pentax KP||optical||n||3.0||921||tilting||n||1/6000s||7.0||Y||Y||Pentax KP|
|Pentax K-3 II||optical||Y||3.2||1037||fixed||n||1/8000s||8.3||n||Y||Pentax K-3 II|
|Pentax K-5||optical||Y||3.0||921||fixed||n||1/8000s||7.0||Y||Y||Pentax K-5|
The Pentax K-3 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The E-30 writes its imaging data to Compact Flash or xD Picture cards, while the K-3 uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.
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 Olympus E-30 and Pentax K-3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Olympus E-30||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-30|
|Pentax K-3||Y||mono||mono||Y||Y||mini||3.0||-||-||-||Pentax K-3|
|Canon 70D||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Canon 70D|
|Nikon D7100||Y||stereo||mono||Y||Y||mini||2.0||-||-||-||Nikon D7100|
|Olympus E-450||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-450|
|Olympus E-600||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-600|
|Olympus E-620||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-620|
|Olympus E-P1||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-P1|
|Olympus E-P2||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-P2|
|Olympus E-420||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-420|
|Olympus E-520||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-520|
|Olympus E-3||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-3|
|Olympus E-410||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-410|
|Olympus E-510||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-510|
|Pentax KP||Y||stereo||mono||Y||-||none||2.0||Y||-||-||Pentax KP|
|Pentax K-3 II||Y||mono||mono||Y||Y||mini||3.0||-||-||-||Pentax K-3 II|
|Pentax K-5||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Pentax K-5|
Studio photographers will appreciate that the Pentax K-3 (unlike the E-30) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the E-30 and the K-3 have been discontinued, but can regularly be found used on eBay. The K-3 was replaced by the Pentax K-3 II, while the E-30 does not have a direct successor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Pentax websites.
So what is the bottom line? Is the Olympus E-30 better than the Pentax K-3 or vice versa? Below is a summary of the relative strengths of each of the two contestants.
Advantages of the Olympus E-30:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Less heavy: Is lighter (by 99g or 12 percent) and hence easier to carry around.
- Longer lasting: Can take more shots (750 versus 560) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in November 2008).
Arguments in favor of the Pentax K-3:
- More detail: Has more megapixels (24.1 vs 12.2MP), which boosts linear resolution by 43%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (25 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.4 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (3 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1.2 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/60i video.
- More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.63x vs 0.51x).
- Larger screen: Has a bigger rear LCD (3.2" vs 2.7") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1037k vs 230k dots).
- Faster burst: Shoots at higher frequency (8.3 vs 5 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (131x100mm vs 142x108mm) and will fit more readily into a bag.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More modern: Reflects 4 years and 11 months of technical progress since the E-30 launch.
If the count of individual advantages (bullet points above) is taken as a guide, the K-3 is the clear winner of the contest (18 : 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 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.
How about other alternatives? Do the specifications of the Olympus E-30 and the Pentax K-3 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 says little about, for example, the shooting experience and imaging performance of the E-30 and the K-3 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 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.
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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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 camera comparisons
Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just use the search menu 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.
- Canon Rebel vs Olympus E-30
- Canon SX50 vs Olympus E-30
- Canon XS vs Olympus E-30
- Fujifilm X-E3 vs Pentax K-3
- Leica M10-P vs Pentax K-3
- Nikon D3200 vs Olympus E-30
- Nikon D3200 vs Pentax K-3
- Nikon D60 vs Pentax K-3
- Olympus E-30 vs Sigma fp
- Olympus E-P1 vs Pentax K-3
- Olympus E-P3 vs Pentax K-3 II
- Pentax K-3 II vs Sony RX100 IV
Specifications: Olympus E-30 vs Pentax K-3
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 Model||Olympus E-30||Pentax K-3|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Four Thirds lenses||Pentax K mount lenses|
|Launch Date||November 2008||October 2013|
|Launch Price||USD 1299||USD 1299|
|Sensor Specs||Olympus E-30||Pentax K-3|
|Sensor Format||Four Thirds Sensor||APS-C Sensor|
|Sensor Size||17.3 x 13.0 mm||23.5 x 15.6 mm|
|Sensor Area||224.9 mm2||366.6 mm2|
|Sensor Diagonal||21.6 mm||28.2 mm|
|Sensor Resolution||12.2 Megapixels||24.1 Megapixels|
|Image Resolution||4032 x 3024 pixels||6016 x 4000 pixels|
|Pixel Pitch||4.29 μm||3.90 μm|
|Pixel Density||5.42 MP/cm2||6.56 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||1080/60i Video|
|ISO Setting||100-3200 ISO||100-51200 ISO|
|Image Processor||TruePic III+||PRIME III|
|DXO Sensor Quality (score)||55||80|
|DXO Color Depth (bits)||21.3||23.7|
|DXO Dynamic Range (EV)||10.4||13.4|
|DXO Low Light (ISO)||530||1216|
|Screen Specs||Olympus E-30||Pentax K-3|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||98%||100%|
|Top-Level Screen||Control Panel||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||2.7 inch||3.2 inch|
|LCD Resolution||230k dots||1037k dots|
|LCD Attachment||Swivel screen||Fixed screen|
|Shooting Specs||Olympus E-30||Pentax K-3|
|Focus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000/s||1/8000/s|
|Continuous Shooting||5 shutter flaps/s||8.3 shutter flaps/s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||CF or XD cards||SDXC cards|
|Second Storage Option||Dual card slots||Dual card slots|
|Connectivity Specs||Olympus E-30||Pentax K-3|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 3.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Olympus E-30||Pentax K-3|
|Environmental Sealing||Not weather sealed||Weathersealed body|
|Battery Life (CIPA)||750 shots per charge||560 shots per charge|
142 x 108 x 75 mm
(5.6 x 4.3 x 3.0 in)
131 x 100 x 77 mm
(5.2 x 3.9 x 3.0 in)
|Camera Weight||701 g (24.7 oz)||800 g (28.2 oz)|
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