Olympus E-P3 vs Pentax Q
The Olympus PEN E-P3 and the Pentax Q are two digital cameras that were announced in June 2011. Both the E-P3 and the Pentax Q are mirrorless interchangeable lens cameras that are based on a Four Thirds (E-P3) and a 1/2.3-inch (Pentax Q) sensor. The Olympus has a resolution of 12.2 megapixels, whereas the Pentax provides 12 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Olympus E-P3||Pentax Q|
|Mirrorless system camera||Mirrorless system camera|
|Micro Four Thirds lenses||Pentax Q mount lenses|
|12.2 MP, Four Thirds Sensor||12 MP, 1/2.3" Sensor|
|1080/60i Video||1080/30p Video|
|ISO 200-12800||ISO 125-6400|
|Viewfinder optional||Viewfinder optional|
|3.0" LCD, 614k dots||3.0" LCD, 460k dots|
|Fixed touchscreen||Fixed screen (not touch-sensitive)|
|3 shutter flaps per second||1.5 shutter flaps per second|
|In-body stabilization||In-body stabilization|
|330 shots per battery charge||230 shots per battery charge|
|122 x 69 x 34 mm, 369 g||98 x 57 x 31 mm, 180 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus PEN E-P3 and the Pentax Q? 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.
The physical size and weight of the Olympus E-P3 and the Pentax Q 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.
The E-P3 can be obtained in three different colors (black, silver, white), while the Pentax Q is available in two color-versions (black, white).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax Q is considerably smaller (34 percent) than the Olympus E-P3. Moreover, the Pentax Q is substantially lighter (51 percent) than the E-P3. In this context, it is worth noting that neither the E-P3 nor the Pentax Q 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. 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 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.
|Olympus E-P3»||4.8 in||2.7 in||1.3 in||13.0 oz||330||n||Jun 2011||799||-||Olympus E-P3|
|Pentax Q«||3.9 in||2.2 in||1.2 in||6.3 oz||230||n||Jun 2011||649||-||Pentax Q|
|Olympus E-P5« »||4.8 in||2.7 in||1.5 in||14.8 oz||330||n||May 2013||999||-||Olympus E-P5|
|Olympus E-PL5« »||4.4 in||2.5 in||1.5 in||11.5 oz||360||n||Sep 2012||599||-||Olympus E-PL5|
|Olympus XZ-2« »||4.4 in||2.6 in||1.9 in||12.2 oz||340||n||Sep 2012||599||-||Olympus XZ-2|
|Olympus E-PL2« »||4.5 in||2.8 in||1.7 in||12.8 oz||280||n||Jan 2011||599||-||Olympus E-PL2|
|Olympus E-PL3« »||4.3 in||2.5 in||1.5 in||11.0 oz||300||n||Jun 2011||599||-||Olympus E-PL3|
|Olympus E-PM1« »||4.3 in||2.5 in||1.3 in||9.3 oz||330||n||Jun 2011||499||-||Olympus E-PM1|
|Olympus E-PL1« »||4.5 in||2.8 in||1.7 in||11.8 oz||290||n||Feb 2010||599||-||Olympus E-PL1|
|Olympus E-620« »||5.1 in||3.7 in||2.4 in||18.4 oz||500||n||Feb 2009||699||-||Olympus E-620|
|Olympus E-P1« »||4.8 in||2.8 in||1.4 in||12.5 oz||300||n||Jun 2009||799||-||Olympus E-P1|
|Olympus E-P2« »||4.8 in||2.8 in||1.4 in||12.5 oz||300||n||Nov 2009||799||-||Olympus E-P2|
|Panasonic GX1« »||4.6 in||2.7 in||1.5 in||11.2 oz||320||n||Nov 2011||699||-||Panasonic GX1|
|Panasonic G10« »||4.9 in||3.3 in||2.9 in||13.7 oz||380||n||Mar 2010||499||-||Panasonic G10|
|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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The Pentax Q was launched at a somewhat lower price (by 19 percent) than the E-P3, which makes it more attractive for photographers on a tight budget. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
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. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Olympus E-P3 features a Four Thirds sensor and the Pentax Q a 1/2.3-inch sensor. The sensor area in the Pentax Q is 88 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 5.6. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.
With 12.2MP, the E-P3 offers a slightly higher resolution than the Pentax Q (12MP), but the E-P3 nevertheless has larger individual pixels (pixel pitch of 4.29μm versus 1.53μm for the Pentax Q) due to its larger sensor. 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.
The Olympus PEN E-P3 has a native sensitivity range from ISO 200 to ISO 12800. The corresponding ISO settings for the Pentax Q are ISO 125 to ISO 6400 (no boost).
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 review, the E-P3 has a notably higher overall DXO score than the Pentax Q (overall score 4 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.6 bits higher color depth, 1 EV of lower dynamic range, and 1.5 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.
|Olympus E-P3»||Four Thirds||12.2||4032||3024||1080/60i||20.8||10.1||536||51||Olympus E-P3|
|Pentax Q«||1/2.3||12.0||4000||3000||1080/30p||20.2||11.1||189||47||Pentax Q|
|Olympus E-P5« »||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.4||895||72||Olympus E-P5|
|Olympus E-PL5« »||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||889||72||Olympus E-PL5|
|Olympus XZ-2« »||1/1.7||11.8||3968||2976||1080/30p||20.4||11.3||216||49||Olympus XZ-2|
|Olympus E-PL2« »||Four Thirds||12.2||4032||3024||720/30p||21.4||10.2||573||55||Olympus E-PL2|
|Olympus E-PL3« »||Four Thirds||12.2||4032||3024||1080/60i||20.9||10.3||499||52||Olympus E-PL3|
|Olympus E-PM1« »||Four Thirds||12.2||4032||3024||1080/60i||21.0||10.3||499||52||Olympus E-PM1|
|Olympus E-PL1« »||Four Thirds||12.2||4032||3024||720/30p||21.5||10.1||487||54||Olympus E-PL1|
|Olympus E-620« »||Four Thirds||12.2||4032||3024||-||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|
|Panasonic GX1« »||Four Thirds||15.8||4592||3448||1080/60p||20.8||10.6||703||55||Panasonic GX1|
|Panasonic G10« »||Four Thirds||12.0||4000||3000||720/30p||21.2||10.1||411||52||Panasonic G10|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the E-P3 provides a higher frame rate than the Pentax Q. It can shoot video footage at 1080/60i, while the Pentax is limited to 1080/30p.
Beyond body and sensor, cameras can and do differ across a range of features. The E-P3 and the Pentax Q are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. However, optional viewfinders – the VF-3 for the E-P3 and the O-VF1 for the Pentax Q – are available as accessories. The following table reports on some other key feature differences and similarities of the Olympus E-P3, the Pentax Q, and comparable cameras.
|Olympus E-P3»||-||n||3.0||614||fixed||Y||1/4000s||3.0||Y||Y||Olympus E-P3|
|Pentax Q«||-||n||3.0||460||fixed||n||1/2000s||1.5||Y||Y||Pentax Q|
|Olympus E-P5« »||-||n||3.0||1037||tilting||Y||1/8000s||9.0||Y||Y||Olympus E-P5|
|Olympus E-PL5« »||-||n||3.0||460||tilting||Y||1/4000s||8.0||n||Y||Olympus E-PL5|
|Olympus XZ-2« »||-||n||3.0||920||tilting||Y||1/2000s||5.0||Y||Y||Olympus XZ-2|
|Olympus E-PL2« »||-||n||3.0||460||fixed||n||1/4000s||3.0||Y||Y||Olympus E-PL2|
|Olympus E-PL3« »||-||n||3.0||460||tilting||n||1/4000s||5.5||n||Y||Olympus E-PL3|
|Olympus E-PM1« »||-||n||3.0||460||fixed||n||1/4000s||5.5||n||Y||Olympus E-PM1|
|Olympus E-PL1« »||-||n||2.7||230||fixed||n||1/2000s||3.0||Y||Y||Olympus E-PL1|
|Olympus E-620« »||optical||n||2.7||230||swivel||n||1/4000s||4.0||Y||Y||Olympus E-620|
|Olympus E-P1« »||-||n||3.0||230||fixed||n||1/4000s||3.0||n||Y||Olympus E-P1|
|Olympus E-P2« »||-||n||3.0||230||fixed||n||1/4000s||3.0||n||Y||Olympus E-P2|
|Panasonic GX1« »||-||n||3.0||460||fixed||Y||1/4000s||4.2||Y||n||Panasonic GX1|
|Panasonic G10« »||202||n||3.0||460||fixed||n||1/4000s||2.6||Y||n||Panasonic G10|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-P3 has a touchscreen, while the Pentax Q has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The Pentax Q 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.
Concerning the storage of imaging data, both the E-P3 and the Pentax Q write their files to SDXC cards. The E-P3 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the Pentax Q cannot take advantage of Ultra High Speed SD cards.
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 PEN E-P3 and Pentax Q and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Olympus E-P3»||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-P3|
|Pentax Q«||Y||mono||mono||-||-||mini||2.0||-||-||-||Pentax Q|
|Olympus E-P5« »||Y||stereo||mono||-||-||micro||2.0||Y||-||-||Olympus E-P5|
|Olympus E-PL5« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Olympus E-PL5|
|Olympus XZ-2« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Olympus XZ-2|
|Olympus E-PL2« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-PL2|
|Olympus E-PL3« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-PL3|
|Olympus E-PM1« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Olympus E-PM1|
|Olympus E-PL1« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-PL1|
|Olympus E-620« »||Y||-||-||-||-||-||2.0||-||-||-||Olympus E-620|
|Olympus E-P1« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-P1|
|Olympus E-P2« »||Y||stereo||-||-||-||mini||2.0||-||-||-||Olympus E-P2|
|Panasonic GX1« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Panasonic GX1|
|Panasonic G10« »||Y||mono||-||-||-||mini||2.0||-||-||-||Panasonic G10|
Both the E-P3 and the Pentax Q have been discontinued, but can regularly be found used on eBay. The Pentax Q was replaced by the Pentax Q10, 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 Olympus and Pentax websites.
So what conclusions can be drawn? Is there a clear favorite between the Olympus E-P3 and the Pentax Q? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Olympus PEN E-P3:
- Better image quality: Scores markedly higher (4 points) in the DXO overall assessment.
- Better low-light sensitivity: Requires less light for good images (1.5 stops ISO advantage).
- Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
- More detailed LCD: Has a higher resolution rear screen (614k vs 460k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (3 vs 1.5 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (330 versus 230) on a single battery charge.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
Arguments in favor of the Pentax Q:
- More dynamic range: Captures a broader range of light and dark details (1 EV of extra DR).
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (98x57mm vs 122x69mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 189g or 51 percent) and is thus easier to take along.
- More affordable: Was released into a lower priced segment (19 percent cheaper at launch).
If the number of relative strengths (bullet points above) is taken as a guide, the E-P3 is the clear winner of the match-up (9 : 5 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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-P3 and the Pentax Q place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.
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-P3 or the Pentax Q 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.
This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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.
|Olympus E-P3»||83/100||74/100||4.5/5||4.5/5||4.5/5||Jun 2011||799||-||Olympus E-P3|
|Pentax Q«||-||-||4/5||3.5/5||3.5/5||Jun 2011||649||-||Pentax Q|
|Olympus E-P5« »||+ +||78/100||4.5/5||4.5/5||5/5||May 2013||999||-||Olympus E-P5|
|Olympus E-PL5« »||+ +||-||4.5/5||4.5/5||4.5/5||Sep 2012||599||-||Olympus E-PL5|
|Olympus XZ-2« »||+||-||4.5/5||4/5||4.5/5||Sep 2012||599||-||Olympus XZ-2|
|Olympus E-PL2« »||83/100||71/100||4.5/5||4.5/5||4.5/5||Jan 2011||599||-||Olympus E-PL2|
|Olympus E-PL3« »||+ +||72/100||4.5/5||-||4/5||Jun 2011||599||-||Olympus E-PL3|
|Olympus E-PM1« »||86/100||71/100||4.5/5||-||4.5/5||Jun 2011||499||-||Olympus E-PM1|
|Olympus E-PL1« »||86/100||69/100||4/5||4.5/5||4.5/5||Feb 2010||599||-||Olympus E-PL1|
|Olympus E-620« »||88/100||72/100||4.5/5||o||5/5||Feb 2009||699||-||Olympus E-620|
|Olympus E-P1« »||+||66/100||4/5||4/5||4.5/5||Jun 2009||799||-||Olympus E-P1|
|Olympus E-P2« »||+||69/100||4/5||4.5/5||4.5/5||Nov 2009||799||-||Olympus E-P2|
|Panasonic GX1« »||+||77/100||4.5/5||4.5/5||4.5/5||Nov 2011||699||-||Panasonic GX1|
|Panasonic G10« »||-||70/100||4/5||-||4/5||Mar 2010||499||-||Panasonic G10|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
The review scores listed above should be treated with care, though. The ratings are only valid when referring 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 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. 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 G3 X vs Pentax Q
- Contax N Digital vs Olympus E-P3
- Fujifilm X-A7 vs Olympus E-P3
- Kodak AZ901 vs Pentax Q
- Leica S2 vs Olympus E-P3
- Leica V-LUX 5 vs Olympus E-P3
- Nikon D3400 vs Olympus E-P3
- Panasonic FZ82 vs Pentax Q
- Pentax Q vs Sony A5000
- Pentax Q vs Sony A7S II
- Pentax Q vs Sony NEX-3N
- Pentax Q vs Sony RX10
Specifications: Olympus E-P3 vs Pentax Q
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-P3||Pentax Q|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Micro Four Thirds lenses||Pentax Q mount lenses|
|Launch Date||June 2011||June 2011|
|Launch Price||USD 799||USD 649|
|Sensor Specs||Olympus E-P3||Pentax Q|
|Sensor Format||Four Thirds Sensor||1/2.3" Sensor|
|Sensor Size||17.3 x 13.0 mm||6.17 x 4.55 mm|
|Sensor Area||224.9 mm2||28.0735 mm2|
|Sensor Diagonal||21.6 mm||7.7 mm|
|Sensor Resolution||12.2 Megapixels||12 Megapixels|
|Image Resolution||4032 x 3024 pixels||4000 x 3000 pixels|
|Pixel Pitch||4.29 μm||1.53 μm|
|Pixel Density||5.42 MP/cm2||42.74 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60i Video||1080/30p Video|
|ISO Setting||200-12800 ISO||125-6400 ISO|
|DXO Sensor Quality (score)||51||47|
|DXO Color Depth (bits)||20.8||20.2|
|DXO Dynamic Range (EV)||10.1||11.1|
|DXO Low Light (ISO)||536||189|
|Screen Specs||Olympus E-P3||Pentax Q|
|Viewfinder Type||Viewfinder optional||Viewfinder optional|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||614k dots||460k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Olympus E-P3||Pentax Q|
|Autofocus System||Contrast-detect AF||Contrast-detect AF|
|Continuous Shooting||3 shutter flaps/s||1.5 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||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||no|
|Connectivity Specs||Olympus E-P3||Pentax Q|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Olympus E-P3||Pentax Q|
|Battery Life (CIPA)||330 shots per charge||230 shots per charge|
122 x 69 x 34 mm
(4.8 x 2.7 x 1.3 in)
98 x 57 x 31 mm
(3.9 x 2.2 x 1.2 in)
|Camera Weight||369 g (13.0 oz)||180 g (6.3 oz)|
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