Pentax Q vs Olympus E-P3
The Pentax Q and the Olympus PEN E-P3 are two digital cameras that were announced in June 2011. Both the Pentax Q and the E-P3 are mirrorless interchangeable lens cameras that are based on a 1/2.3-inch (Pentax Q) and a Four Thirds (E-P3) sensor. The Pentax has a resolution of 12 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax Q 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
An illustration of the physical size and weight of the Pentax Q and the Olympus E-P3 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.
The Pentax Q can be obtained in two different colors (black, white), while the E-P3 is available in three color-versions (black, silver, white).
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 considerably larger (51 percent) than the Pentax Q. Moreover, the E-P3 is substantially heavier (105 percent) than the Pentax Q. In this context, it is worth noting that neither the Pentax Q 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. 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. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.
Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax Q | 98 mm | 57 mm | 31 mm | 180 g | 230 | n | Jun 2011 | 649 | ebay.com | |
2. | Olympus E-P3 | 122 mm | 69 mm | 34 mm | 369 g | 330 | n | Jun 2011 | 799 | ebay.com | |
3. | Fujifilm X10 | 117 mm | 70 mm | 57 mm | 350 g | 270 | n | Sep 2011 | 599 | ebay.com | |
4. | Olympus E-620 | 130 mm | 94 mm | 60 mm | 521 g | 500 | n | Feb 2009 | 699 | ebay.com | |
5. | Olympus E-P1 | 121 mm | 70 mm | 36 mm | 355 g | 300 | n | Jun 2009 | 799 | ebay.com | |
6. | Olympus E-P2 | 121 mm | 70 mm | 36 mm | 355 g | 300 | n | Nov 2009 | 799 | ebay.com | |
7. | Olympus E-PL1 | 115 mm | 72 mm | 42 mm | 334 g | 290 | n | Feb 2010 | 599 | ebay.com | |
8. | Olympus E-PL2 | 114 mm | 72 mm | 42 mm | 362 g | 280 | n | Jan 2011 | 599 | ebay.com | |
9. | Olympus E-PL3 | 110 mm | 64 mm | 37 mm | 313 g | 300 | n | Jun 2011 | 599 | ebay.com | |
10. | Olympus XZ-2 | 113 mm | 65 mm | 48 mm | 346 g | 340 | n | Sep 2012 | 599 | ebay.com | |
11. | Panasonic G2 | 124 mm | 84 mm | 74 mm | 428 g | 360 | n | Mar 2010 | 599 | ebay.com | |
12. | Panasonic GF2 | 113 mm | 68 mm | 33 mm | 310 g | 300 | n | Nov 2010 | 549 | ebay.com | |
13. | Panasonic GF3 | 108 mm | 67 mm | 32 mm | 264 g | 300 | n | Jun 2011 | 549 | ebay.com | |
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. 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. 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 size of the sensor inside a digital camera is one of the key determinants 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. 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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Pentax Q features a 1/2.3-inch sensor and the Olympus E-P3 a Four Thirds sensor. The sensor area in the E-P3 is 704 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 2.0. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.
With 12.2MP, the E-P3 offers a 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 Pentax Q has a native sensitivity range from ISO 125 to ISO 6400. The corresponding ISO settings for the Olympus PEN E-P3 are ISO 200 to ISO 12800 (no boost).
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 consideration, the E-P3 has a markedly higher DXO score than the Pentax Q (overall score 4 points higher), which will translate into better image quality. The 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax Q | 1/2.3 | 12.0 | 4000 | 3000 | 1080/30p | 20.2 | 11.1 | 189 | 47 | |
2. | Olympus E-P3 | Four Thirds | 12.2 | 4032 | 3024 | 1080/60i | 20.8 | 10.1 | 536 | 51 | |
3. | Fujifilm X10 | 2/3 | 12.0 | 4000 | 3000 | 1080/30p | 20.5 | 11.3 | 245 | 50 | |
4. | Olympus E-620 | Four Thirds | 12.2 | 4032 | 3024 | none | 21.3 | 10.3 | 536 | 55 | |
5. | Olympus E-P1 | Four Thirds | 12.2 | 4032 | 3024 | 720/30p | 21.4 | 10.4 | 536 | 55 | |
6. | Olympus E-P2 | Four Thirds | 12.2 | 4032 | 3024 | 720/30p | 21.5 | 10.4 | 505 | 56 | |
7. | Olympus E-PL1 | Four Thirds | 12.2 | 4032 | 3024 | 720/30p | 21.5 | 10.1 | 487 | 54 | |
8. | Olympus E-PL2 | Four Thirds | 12.2 | 4032 | 3024 | 720/30p | 21.4 | 10.2 | 573 | 55 | |
9. | Olympus E-PL3 | Four Thirds | 12.2 | 4032 | 3024 | 1080/60i | 20.9 | 10.3 | 499 | 52 | |
10. | Olympus XZ-2 | 1/1.7 | 11.8 | 3968 | 2976 | 1080/30p | 20.4 | 11.3 | 216 | 49 | |
11. | Panasonic G2 | Four Thirds | 12.0 | 4000 | 3000 | 720/30p | 21.2 | 10.3 | 493 | 53 | |
12. | Panasonic GF2 | Four Thirds | 12.0 | 4000 | 3000 | 1080/60i | 21.2 | 10.3 | 506 | 54 | |
13. | Panasonic GF3 | Four Thirds | 12.0 | 4000 | 3000 | 1080/60i | 20.6 | 10.1 | 459 | 50 |
Many modern cameras are not only capable of taking still images, but can also record movies. 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 faster frame rate than the Pentax Q. It can shoot movie footage at 1080/60i, while the Pentax is limited to 1080/30p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. The Pentax Q and the E-P3 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 O-VF1 for the Pentax Q and the VF-3 for the E-P3 – are available as accessories. The following table reports on some other key feature differences and similarities of the Pentax Q, the Olympus E-P3, and comparable cameras.
Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax Q | optional | n | 3.0 / 460 | fixed | n | 1/2000s | 1.5/s | Y | Y | |
2. | Olympus E-P3 | optional | n | 3.0 / 614 | fixed | Y | 1/4000s | 3.0/s | Y | Y | |
3. | Fujifilm X10 | optical | n | 2.8 / 460 | fixed | n | 1/4000s | 10.0/s | Y | Y | |
4. | Olympus E-620 | optical | n | 2.7 / 230 | swivel | n | 1/4000s | 4.0/s | Y | Y | |
5. | Olympus E-P1 | none | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | n | Y | |
6. | Olympus E-P2 | optional | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | n | Y | |
7. | Olympus E-PL1 | optional | n | 2.7 / 230 | fixed | n | 1/2000s | 3.0/s | Y | Y | |
8. | Olympus E-PL2 | optional | n | 3.0 / 460 | fixed | n | 1/4000s | 3.0/s | Y | Y | |
9. | Olympus E-PL3 | optional | n | 3.0 / 460 | tilting | n | 1/4000s | 5.5/s | n | Y | |
10. | Olympus XZ-2 | optional | n | 3.0 / 920 | tilting | Y | 1/2000s | 5.0/s | Y | Y | |
11. | Panasonic G2 | 1440 | n | 3.0 / 460 | swivel | Y | 1/4000s | 2.6/s | Y | n | |
12. | Panasonic GF2 | optional | n | 3.0 / 460 | fixed | Y | 1/4000s | 2.6/s | Y | n | |
13. | Panasonic GF3 | none | n | 3.0 / 460 | fixed | Y | 1/4000s | 3.2/s | Y | n | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
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 Pentax Q and the E-P3 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.
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 Pentax Q and Olympus PEN E-P3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax Q | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
2. | Olympus E-P3 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
3. | Fujifilm X10 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
4. | Olympus E-620 | Y | - / - | - | - | - | 2.0 | - | - | - | |
5. | Olympus E-P1 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
6. | Olympus E-P2 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
7. | Olympus E-PL1 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
8. | Olympus E-PL2 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
9. | Olympus E-PL3 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
10. | Olympus XZ-2 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
11. | Panasonic G2 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
12. | Panasonic GF2 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
13. | Panasonic GF3 | - | stereo / mono | - | - | mini | 2.0 | - | - | - |
Both the Pentax Q and the E-P3 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 features and operation of the Pentax Q and E-P3 can be found, respectively, in the Pentax Q Manual (free pdf) or the online Olympus E-P3 Manual.
Review summary
So what conclusions can be drawn? Is there a clear favorite between the Pentax Q and the Olympus E-P3? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Reasons to prefer the Pentax Q:
- More dynamic range: Captures a larger spectrum 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 thus needs less room in the bag.
- Less heavy: Is lighter (by 189g or 51 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced segment (19 percent cheaper at launch).
Arguments in favor of the Olympus PEN E-P3:
- Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
- Better low-light sensitivity: Can shoot in dim conditions (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: Has a touchscreen to facilitate handling and shooting adjustments.
- 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: Gets more shots (330 versus 230) out of a single battery charge.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
If the count of individual advantages (bullet points above) is taken as a guide, the E-P3 is the clear winner of the contest (9 : 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 before making a decision on a new camera. 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 Pentax Q and the Olympus E-P3 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the Pentax Q or the E-P3. 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
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 (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.
Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Pentax Q | 3/5 | .. | .. | .. | 4/5 | 3.5/5 | Jun 2011 | 649 | ebay.com | |
2. | Olympus E-P3 | .. | 83/100 | .. | 74/100 | 4.5/5 | 4.5/5 | Jun 2011 | 799 | ebay.com | |
3. | Fujifilm X10 | .. | .. | .. | 76/100 | 4/5 | 4.5/5 | Sep 2011 | 599 | ebay.com | |
4. | Olympus E-620 | 3/5 | 88/100 | .. | 72/100 | 4.5/5 | 5/5 | Feb 2009 | 699 | ebay.com | |
5. | Olympus E-P1 | .. | + | .. | 66/100 | 4/5 | 4.5/5 | Jun 2009 | 799 | ebay.com | |
6. | Olympus E-P2 | 3/5 | + | .. | 69/100 | 4/5 | 4.5/5 | Nov 2009 | 799 | ebay.com | |
7. | Olympus E-PL1 | .. | 86/100 | .. | 69/100 | 4/5 | 4.5/5 | Feb 2010 | 599 | ebay.com | |
8. | Olympus E-PL2 | 3/5 | 83/100 | .. | 71/100 | 4.5/5 | 4.5/5 | Jan 2011 | 599 | ebay.com | |
9. | Olympus E-PL3 | 3/5 | + + | .. | 72/100 | 4.5/5 | 4/5 | Jun 2011 | 599 | ebay.com | |
10. | Olympus XZ-2 | 4/5 | + | .. | .. | 4.5/5 | 4.5/5 | Sep 2012 | 599 | ebay.com | |
11. | Panasonic G2 | .. | .. | .. | 72/100 | 4/5 | 4.5/5 | Mar 2010 | 599 | ebay.com | |
12. | Panasonic GF2 | 3/5 | 82/100 | .. | 70/100 | 4.5/5 | 4.5/5 | Nov 2010 | 549 | ebay.com | |
13. | Panasonic GF3 | 3/5 | 82/100 | .. | 71/100 | 4.5/5 | 4/5 | Jun 2011 | 549 | ebay.com | |
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. |
Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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.
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 make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Pentax Q 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 Model | Pentax Q | Olympus E-P3 |
---|---|---|
Camera Type | Mirrorless system camera | Mirrorless system camera |
Camera Lens | Pentax Q mount lenses | Micro Four Thirds lenses |
Launch Date | June 2011 | June 2011 |
Launch Price | USD 649 | USD 799 |
Sensor Specs | Pentax Q | Olympus E-P3 |
Sensor Technology | CMOS | CMOS |
Sensor Format | 1/2.3" Sensor | Four Thirds Sensor |
Sensor Size | 6.17 x 4.55 mm | 17.3 x 13.0 mm |
Sensor Area | 28.0735 mm2 | 224.9 mm2 |
Sensor Diagonal | 7.7 mm | 21.6 mm |
Crop Factor | 5.6x | 2.0x |
Sensor Resolution | 12 Megapixels | 12.2 Megapixels |
Image Resolution | 4000 x 3000 pixels | 4032 x 3024 pixels |
Pixel Pitch | 1.53 μm | 4.29 μm |
Pixel Density | 42.74 MP/cm2 | 5.42 MP/cm2 |
Moiré control | Anti-Alias filter | Anti-Alias filter |
Movie Capability | 1080/30p Video | 1080/60i Video |
ISO Setting | 125 - 6,400 ISO | 200 - 12,800 ISO |
DXO Sensor Quality (score) | 47 | 51 |
DXO Color Depth (bits) | 20.2 | 20.8 |
DXO Dynamic Range (EV) | 11.1 | 10.1 |
DXO Low Light (ISO) | 189 | 536 |
Screen Specs | Pentax Q | Olympus E-P3 |
Viewfinder Type | Viewfinder optional | Viewfinder optional |
LCD Framing | Live View | Live View |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 460k dots | 614k dots |
LCD Attachment | Fixed screen | Fixed screen |
Touch Input | no Touchscreen | Touchscreen |
Shooting Specs | Pentax Q | Olympus E-P3 |
Focus System | Contrast-detect AF | Contrast-detect AF |
Continuous Shooting | 1.5 shutter flaps/s | 3 shutter flaps/s |
Time-Lapse Photography | Intervalometer built-in | no Intervalometer |
Image Stabilization | In-body stabilization | In-body stabilization |
Fill Flash | Built-in Flash | Built-in Flash |
Storage Medium | SDXC cards | SDXC cards |
Single or Dual Card Slots | Single card slot | Single card slot |
UHS card support | no | UHS-I |
Connectivity Specs | Pentax Q | Olympus E-P3 |
External Flash | Hotshoe | Hotshoe |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | mini HDMI | mini HDMI |
Wifi Support | no Wifi | no Wifi |
Body Specs | Pentax Q | Olympus E-P3 |
Battery Type | Pentax D-LI68 | Olympus BLS-5 |
Battery Life (CIPA) | 230 shots per charge | 330 shots per charge |
Body Dimensions |
98 x 57 x 31 mm (3.9 x 2.2 x 1.2 in) |
122 x 69 x 34 mm (4.8 x 2.7 x 1.3 in) |
Camera Weight | 180 g (6.3 oz) | 369 g (13.0 oz) |
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