Olympus E-620 vs Sony NEX-7
The Olympus E-620 and the Sony Alpha NEX-7 are two digital cameras that were revealed to the public, respectively, in February 2009 and August 2011. The E-620 is a DSLR, while the NEX-7 is a mirrorless interchangeable lens camera. The cameras are based on a Four Thirds (E-620) and an APS-C (NEX-7) sensor. The Olympus has a resolution of 12.2 megapixels, whereas the Sony provides 24 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Olympus E-620||Sony NEX-7|
|Digital single lens reflex||Mirrorless system camera|
|Four Thirds lenses||Sony E mount lenses|
|12.2 MP, Four Thirds Sensor||24 MP, APS-C Sensor|
|no Video||1080/60i Video|
|ISO 100-3200||ISO 100-16000|
|Optical viewfinder||Electronic viewfinder (2359k dots)|
|2.7" LCD, 230k dots||3.0" LCD, 921k dots|
|Swivel screen (not touch-sensitive)||Tilting screen (not touch-sensitive)|
|4 shutter flaps per second||10 shutter flaps per second|
|In-body stabilization||Lens stabilization only|
|500 shots per battery charge||430 shots per battery charge|
|130 x 94 x 60 mm, 521 g||120 x 67 x 43 mm, 400 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-620 and the Sony Alpha NEX-7? 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-620 and the Sony NEX-7 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.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony NEX-7 is considerably smaller (34 percent) than the Olympus E-620. Moreover, the NEX-7 is markedly lighter (23 percent) than the E-620. In this context, it is worth noting that neither the E-620 nor the NEX-7 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 Four Thirds Lens Catalog (E-620) and the Sony E-Mount Lens Catalog (NEX-7). Mirrorless cameras, such as the NEX-7, 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.
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-620»||5.1 in||3.7 in||2.4 in||18.4 oz||500||n||Feb 2009||699||Olympus E-620|
|Sony NEX-7«||4.7 in||2.6 in||1.7 in||14.1 oz||430||n||Aug 2011||1,349||Sony NEX-7|
|Fujifilm X100« »||5.0 in||3.0 in||2.1 in||15.7 oz||300||n||Sep 2010||1,199||Fujifilm X100|
|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-450« »||5.1 in||3.6 in||2.1 in||15.5 oz||500||n||Mar 2009||499||Olympus E-450|
|Olympus E-600« »||5.1 in||3.7 in||2.4 in||18.9 oz||500||n||Aug 2009||449||Olympus E-600|
|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|
|Olympus E-30« »||5.6 in||4.3 in||3.0 in||24.7 oz||750||n||Nov 2008||1,299||Olympus E-30|
|Olympus E-420« »||5.1 in||3.6 in||2.1 in||15.5 oz||500||n||Mar 2008||599||Olympus E-420|
|Olympus E-520« »||5.4 in||3.6 in||2.7 in||18.9 oz||750||n||May 2008||699||Olympus E-520|
|Olympus E-410« »||5.1 in||3.6 in||2.1 in||15.3 oz||500||n||Mar 2007||699||Olympus E-410|
|Olympus E-510« »||5.4 in||3.6 in||2.7 in||19.0 oz||750||n||Mar 2007||799||Olympus E-510|
|Sony A6400« »||4.7 in||2.6 in||2.0 in||14.2 oz||410||n||Jan 2019||899||Sony A6400|
|Sony A6000« »||4.7 in||2.6 in||1.8 in||12.1 oz||360||n||Feb 2014||599||Sony A6000|
|Sony A3000« »||5.0 in||3.6 in||3.3 in||14.5 oz||470||n||Aug 2013||329||Sony A3000|
|Sony RX1« »||4.4 in||2.6 in||2.8 in||17.0 oz||270||n||Sep 2012||2,799||Sony RX1|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
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 E-620 was launched at a markedly lower price (by 48 percent) than the NEX-7, 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.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 Olympus E-620 features a Four Thirds sensor and the Sony NEX-7 an APS-C sensor. The sensor area in the NEX-7 is 62 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-620 has a native 4:3 aspect ratio, while the one in the NEX-7 offers a 3:2 aspect.
With 24MP, the NEX-7 offers a higher resolution than the E-620 (12.2MP), but the NEX-7 has smaller individual pixels (pixel pitch of 3.90μm versus 4.29μm for the E-620). Yet, the NEX-7 is a much more recent model (by 2 years and 5 months) than the E-620, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.
The resolution advantage of the Sony NEX-7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the NEX-7 for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Olympus E-620 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-620 has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Sony Alpha NEX-7 are ISO 100 to ISO 16000 (no boost).
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 consideration, the NEX-7 offers substantially better image quality than the E-620 (overall score 26 points higher). The advantage is based on 2.8 bits higher color depth, 3.1 EV in additional dynamic range, and 0.9 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.
|Olympus E-620||Four Thirds||12.2||4032||3024||none||21.3||10.3||536||55||Olympus E-620|
|Sony NEX-7||APS-C||24.0||6000||4000||1080/60i||24.1||13.4||1016||81||Sony NEX-7|
|Fujifilm X100||APS-C||12.2||4288||2848||720/30p||22.9||12.4||1001||73||Fujifilm X100|
|Olympus E-PL1||Four Thirds||12.2||4032||3024||720/30p||21.5||10.1||487||54||Olympus E-PL1|
|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-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-30||Four Thirds||12.2||4032||3024||none||21.3||10.4||530||55||Olympus E-30|
|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-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|
|Sony A6400||APS-C||24.0||6000||4000||4K/30p||24||13.6||1431||83||Sony A6400|
|Sony A6000||APS-C||24.0||6000||4000||1080/60p||24.1||13.1||1347||82||Sony A6000|
|Sony A3000||APS-C||19.8||5456||3632||1080/60i||23.7||12.8||1068||78||Sony A3000|
|Sony RX1||Full Frame||24.0||6000||4000||1080/60p||25.1||14.3||2534||93||Sony RX1|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The NEX-7 indeed provides for movie recording, while the E-620 does not. The highest resolution format that the NEX-7 can use is 1080/60i.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the NEX-7 has an electronic viewfinder (2359k dots), while the E-620 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the NEX-7 offers a wider field of view (100%) than the one in the E-620 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the NEX-7 has a higher magnification (0.73x vs 0.48x), 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-620 and Sony NEX-7 along with similar information for a selection of comparators.
|Olympus E-620||optical||n||2.7||230||swivel||n||1/4000s||4.0||Y||Y||Olympus E-620|
|Sony NEX-7||2359||n||3.0||921||tilting||n||1/4000s||10.0||Y||n||Sony NEX-7|
|Fujifilm X100||1440||n||2.8||460||fixed||n||1/4000s||5.0||Y||n||Fujifilm X100|
|Olympus E-PL1||optional||n||2.7||230||fixed||n||1/2000s||3.0||Y||Y||Olympus E-PL1|
|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-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-30||optical||Y||2.7||230||swivel||n||1/8000s||5.0||Y||Y||Olympus E-30|
|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-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|
|Sony A6400||2359||n||3.0||922||tilting||Y||1/4000s||11.0||Y||n||Sony A6400|
|Sony A6000||1440||n||3.0||922||tilting||n||1/4000s||11.0||Y||n||Sony A6000|
|Sony A3000||202||n||3.0||230||fixed||n||1/4000s||2.5||Y||n||Sony A3000|
|Sony RX1||optional||n||3.0||1229||fixed||n||1/4000s||5.0||Y||n||Sony RX1|
One feature that differentiates the E-620 and the NEX-7 is in-body image stabilization (IBIS). The E-620 reduces the risk of handshake-induced blur with all attached lenses, while the NEX-7 has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.The E-620 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the NEX-7 does not have a selfie-screen.
The E-620 writes its imaging data to Compact Flash or xD Picture cards, while the NEX-7 uses SDXC or Memory Stick PRO Duo cards. The E-620 features dual card slots, which can be very useful in case a memory card fails. In contrast, the NEX-7 only has one slot.
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-620 and Sony Alpha NEX-7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Olympus E-620||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-620|
|Sony NEX-7||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Sony NEX-7|
|Fujifilm X100||Y||stereo||none||-||-||mini||2.0||-||-||-||Fujifilm X100|
|Olympus E-PL1||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-PL1|
|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-P1||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-P1|
|Olympus E-P2||Y||stereo||none||-||-||mini||2.0||-||-||-||Olympus E-P2|
|Olympus E-30||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-30|
|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-410||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-410|
|Olympus E-510||Y||none||none||-||-||none||2.0||-||-||-||Olympus E-510|
|Sony A6400||Y||stereo||mono||Y||-||micro||2.0||Y||Y||Y||Sony A6400|
|Sony A6000||Y||stereo||mono||-||-||micro||2.0||Y||Y||-||Sony A6000|
|Sony A3000||Y||stereo||mono||-||-||mini||2.0||-||-||-||Sony A3000|
|Sony RX1||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Sony RX1|
Both the E-620 and the NEX-7 have been discontinued, but can regularly be found used on eBay. The E-620 was replaced by the Olympus E-600, while the NEX-7 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 Sony websites.
So what conclusions can be drawn? Is there a clear favorite between the Olympus E-620 and the Sony NEX-7? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Olympus E-620:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- 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.
- Longer lasting: Can take more shots (500 versus 430) on a single battery charge.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More affordable: Was introduced into a lower priced category (48 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in February 2009).
Advantages of the Sony Alpha NEX-7:
- More detail: Has more megapixels (24 vs 12.2MP), which boosts linear resolution by 43%.
- Better image quality: Scores substantially higher (26 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.8 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (3.1 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.9 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/60i video.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.48x).
- Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
- Faster burst: Shoots at higher frequency (10 vs 4 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (120x67mm vs 130x94mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 121g or 23 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More modern: Reflects 2 years and 5 months of technical progress since the E-620 launch.
If the count of relative strengths (bullet points above) is taken as a measure, the NEX-7 is the clear winner of the contest (16 : 8 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-620 and the Sony NEX-7 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the E-620 or the NEX-7 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 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.
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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.
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 10D vs Sony NEX-7
- Canon 60D vs Sony NEX-7
- Canon G5 X Mark II vs Sony NEX-7
- Canon G7 X Mark II vs Sony NEX-7
- Canon XS vs Sony NEX-7
- Fujifilm X-T30 vs Sony NEX-7
- Leica V-LUX 3 vs Sony NEX-7
- Nikon D600 vs Sony NEX-7
- Olympus E-620 vs Sony A68
- Panasonic ZS200 vs Sony NEX-7
- Sony A6300 vs Sony NEX-7
- Sony A7R IV vs Sony NEX-7
Specifications: Olympus E-620 vs Sony NEX-7
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-620||Sony NEX-7|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Four Thirds lenses||Sony E mount lenses|
|Launch Date||February 2009||August 2011|
|Launch Price||USD 699||USD 1349|
|Sensor Specs||Olympus E-620||Sony NEX-7|
|Sensor Format||Four Thirds Sensor||APS-C Sensor|
|Sensor Size||17.3 x 13.0 mm||23.4 x 15.6 mm|
|Sensor Area||224.9 mm2||365.04 mm2|
|Sensor Diagonal||21.6 mm||28.1 mm|
|Sensor Resolution||12.2 Megapixels||24 Megapixels|
|Image Resolution||4032 x 3024 pixels||6000 x 4000 pixels|
|Pixel Pitch||4.29 μm||3.90 μm|
|Pixel Density||5.42 MP/cm2||6.57 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/60i Video|
|ISO Setting||100-3200 ISO||100-16000 ISO|
|Image Processor||TruePic III+||BIONZ|
|DXO Sensor Quality (score)||55||81|
|DXO Color Depth (bits)||21.3||24.1|
|DXO Dynamic Range (EV)||10.3||13.4|
|DXO Low Light (ISO)||536||1016|
|Screen Specs||Olympus E-620||Sony NEX-7|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||2359k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||2.7 inch||3.0 inch|
|LCD Resolution||230k dots||921k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Shooting Specs||Olympus E-620||Sony NEX-7|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000/s||1/4000/s|
|Continuous Shooting||4 shutter flaps/s||10 shutter flaps/s|
|Image Stabilization||In-body stabilization||Lens stabilization only|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||CF or XD cards||MS or SDXC cards|
|Second Storage Option||Dual card slots||Single card slot|
|Connectivity Specs||Olympus E-620||Sony NEX-7|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Olympus E-620||Sony NEX-7|
|Battery Life (CIPA)||500 shots per charge||430 shots per charge|
130 x 94 x 60 mm
(5.1 x 3.7 x 2.4 in)
120 x 67 x 43 mm
(4.7 x 2.6 x 1.7 in)
|Camera Weight||521 g (18.4 oz)||400 g (14.1 oz)|
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