Nikon D750 vs Olympus E-520
The Nikon D750 and the Olympus E-520 are two digital cameras that were officially introduced, respectively, in September 2014 and May 2008. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D750) and a Four Thirds (E-520) sensor. The Nikon has a resolution of 24.2 megapixels, whereas the Olympus provides 10 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 Nikon D750 and the Olympus E-520? 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 side-by-side display below illustrates the physical size and weight of the Nikon D750 and the Olympus E-520. 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.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-520 is notably smaller (21 percent) than the Nikon D750. Moreover, the E-520 is markedly lighter (29 percent) than the D750. It is worth mentioning in this context that the D750 is splash and dust resistant, while the E-520 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. 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 Nikon Lens Catalog (D750) and the Four Thirds Lens Catalog (E-520).
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.
|1.||Nikon D750||141 mm||113 mm||78 mm||750 g||1230||Y||Sep 2014||2,299|
|2.||Olympus E-520||136 mm||92 mm||68 mm||535 g||750||n||May 2008||699|
|3.||Canon 6D Mark II||144 mm||111 mm||75 mm||765 g||1200||Y||Jun 2017||1,999|
|4.||Nikon D780||144 mm||116 mm||76 mm||840 g||2260||Y||Jan 2020||2,299|
|5.||Nikon D7500||136 mm||104 mm||73 mm||720 g||950||Y||Apr 2017||1,299|
|6.||Nikon D500||147 mm||115 mm||81 mm||860 g||1240||Y||Jan 2016||1,999|
|7.||Nikon D7200||136 mm||107 mm||76 mm||765 g||1110||Y||Mar 2015||1,199|
|8.||Nikon D7100||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199|
|9.||Nikon Df||144 mm||110 mm||67 mm||760 g||1400||Y||Nov 2013||2,749|
|10.||Nikon D610||141 mm||113 mm||82 mm||850 g||900||Y||Oct 2013||1,999|
|11.||Nikon D600||141 mm||113 mm||82 mm||850 g||900||Y||Sep 2012||2,099|
|12.||Nikon D700||147 mm||123 mm||77 mm||1074 g||1000||Y||Jul 2008||2,999|
|13.||Olympus E-600||130 mm||94 mm||60 mm||535 g||500||n||Aug 2009||449|
|14.||Olympus E-620||130 mm||94 mm||60 mm||521 g||500||n||Feb 2009||699|
|15.||Olympus E-420||130 mm||91 mm||53 mm||440 g||500||n||Mar 2008||599|
|16.||Olympus E-410||130 mm||91 mm||53 mm||435 g||500||n||Mar 2007||699|
|17.||Olympus E-510||136 mm||92 mm||68 mm||538 g||750||n||Mar 2007||799|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or 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 E-520 was launched at a markedly lower price (by 70 percent) than the D750, 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.
The size of the sensor inside a digital camera is one of the key determinants 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 Nikon D750 features a full frame sensor and the Olympus E-520 a Four Thirds sensor. The sensor area in the E-520 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the D750 has a native 3:2 aspect ratio, while the one in the E-520 offers a 4:3 aspect.
With 24.2MP, the D750 offers a higher resolution than the E-520 (10MP), but the D750 nevertheless has larger individual pixels (pixel pitch of 5.97μm versus 4.74μm for the E-520) due to its larger sensor. Moreover, the D750 is a much more recent model (by 6 years and 4 months) than the E-520, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.
The resolution advantage of the Nikon D750 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D750 for good quality output (200 dots per inch) amounts to 30.1 x 20.1 inches or 76.4 x 51 cm, for very good quality (250 dpi) 24.1 x 16.1 inches or 61.1 x 40.8 cm, and for excellent quality (300 dpi) 20.1 x 13.4 inches or 50.9 x 34 cm. The corresponding values for the Olympus E-520 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.
The Nikon D750 has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 50-51200. The corresponding ISO settings for the Olympus E-520 are ISO 100 to ISO 1600 (no boost).
For many cameras, data on sensor performance has been reported by DXO Mark. 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 review, the D750 provides substantially higher image quality than the E-520, with an overall score that is 38 points higher. This advantage is based on 3.4 bits higher color depth, 4.1 EV in additional dynamic range, and 2.4 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.
| DXO |
|1.||Nikon D750||Full Frame||24.2||6016||4016||1080/60p||24.8||14.5||2956||93|
|2.||Olympus E-520||Four Thirds||10.0||3648||2736||none||21.4||10.4||548||55|
|3.||Canon 6D Mark II||Full Frame||26.0||6240||4160||1080/60p||24.4||11.9||2862||85|
|4.||Nikon D780||Full Frame||24.3||6048||4024||4K/30p||..||..||..||..|
|9.||Nikon Df||Full Frame||16.2||4928||3280||none||24.6||13.1||3279||89|
|10.||Nikon D610||Full Frame||24.2||6016||4016||1080/30p||25.1||14.4||2925||94|
|11.||Nikon D600||Full Frame||24.2||6016||4016||1080/30p||25.1||14.2||2980||94|
|12.||Nikon D700||Full Frame||12.1||4256||2832||none||23.5||12.2||2303||80|
|13.||Olympus E-600||Four Thirds||12.2||4032||3024||none||21.5||10.3||541||55|
|14.||Olympus E-620||Four Thirds||12.2||4032||3024||none||21.3||10.3||536||55|
|15.||Olympus E-420||Four Thirds||10.0||3648||2736||none||21.5||10.4||527||56|
|16.||Olympus E-410||Four Thirds||10.0||3648||2736||none||21.1||10.0||494||51|
|17.||Olympus E-510||Four Thirds||10.0||3648||2736||none||21.2||10.0||442||52|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The D750 indeed provides movie recording capabilities, while the E-520 does not. The highest resolution format that the D750 can use is 1080/60p.
Apart from body and sensor, cameras can and do differ across a range of features. The D750 and the E-520 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 D750 offers a wider field of view (100%) than the one in the E-520 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the D750 has a higher magnification (0.70x vs 0.46x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Nikon D750, the Olympus E-520, and comparable cameras.
|3.||Canon 6D Mark II||optical||Y||3.0||1040||swivel||Y||1/4000s||6.5||n||n|
One feature that is present on the D750, but is missing on the E-520 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.
The Nikon D750 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 D750 writes its imaging data to SDXC cards, while the E-520 uses Compact Flash or xD Picture 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 Nikon D750 and Olympus E-520 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|3.||Canon 6D Mark II||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y|
It is notable that the D750 offers wifi support, while the E-520 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the Nikon D750 (unlike the E-520) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the D750 and the E-520 have been discontinued, but can regularly be found used on eBay. The D750 was replaced by the Nikon D780, while the E-520 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 Nikon and Olympus websites.
So how do things add up? Which of the two cameras – the Nikon D750 or the Olympus E-520 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Nikon D750:
- More detail: Offers more megapixels (24.2 vs 10MP) with a 59% higher linear resolution.
- Better image quality: Scores substantially higher (38 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (3.4 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (4.1 EV of extra DR).
- Better low-light sensitivity: Requires less light for good images (2.4 stops ISO advantage).
- Broader imaging potential: Can record not only still images but also 1080/60p movies.
- 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 (0.70x vs 0.46x).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- 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 (1229k vs 215k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster burst: Shoots at higher frequency (6 vs 3.5 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Can take more shots (1230 versus 750) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More modern: Reflects 6 years and 4 months of technical progress since the E-520 launch.
Arguments in favor of the Olympus E-520:
- More compact: Is smaller (136x92mm vs 141x113mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 215g or 29 percent) and is thus easier to take along.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More affordable: Was introduced into a lower priced category (70 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in May 2008).
If the number of relative strengths (bullet points above) is taken as a guide, the D750 is the clear winner of the match-up (19 : 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 Nikon D750 and the Olympus E-520 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the D750 or the E-520 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 (amateurphotographer [AP], cameralabs [CL], 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.
|1.||Nikon D750||5/5||+ +||90/100||4.5/5||4.5/5||Sep 2014||2,299|
|2.||Olympus E-520||..||87/100||+ +||4.5/5||4.5/5||May 2008||699|
|3.||Canon 6D Mark II||4/5||+||80/100||4.5/5||4/5||Jun 2017||1,999|
|4.||Nikon D780||5/5||..||87/100||4.5/5||4.5/5||Jan 2020||2,299|
|5.||Nikon D7500||4.5/5||+ +||86/100||5/5||4.5/5||Apr 2017||1,299|
|6.||Nikon D500||5/5||+ +||91/100||4.5/5||5/5||Jan 2016||1,999|
|7.||Nikon D7200||4/5||+ +||84/100||4.5/5||4.5/5||Mar 2015||1,199|
|8.||Nikon D7100||5/5||+ +||85/100||4.5/5||4.5/5||Feb 2013||1,199|
|9.||Nikon Df||4/5||..||81/100||4/5||4/5||Nov 2013||2,749|
|10.||Nikon D610||4/5||+ +||87/100||4.5/5||4.5/5||Oct 2013||1,999|
|11.||Nikon D600||4/5||+ +||87/100||5/5||4.5/5||Sep 2012||2,099|
|12.||Nikon D700||..||89/100||+ +||4.5/5||4.5/5||Jul 2008||2,999|
|13.||Olympus E-600||..||..||..||..||4.5/5||Aug 2009||449|
|14.||Olympus E-620||3/5||88/100||72/100||4.5/5||5/5||Feb 2009||699|
|15.||Olympus E-420||..||85/100||+ +||4/5||4.5/5||Mar 2008||599|
|16.||Olympus E-410||..||86/100||+ +||4/5||4.5/5||Mar 2007||699|
|17.||Olympus E-510||..||89/100||+ +||3.5/5||4.5/5||Mar 2007||799|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
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. 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 are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Nikon D750 vs Olympus E-520
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||Nikon D750||Olympus E-520|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Nikon F mount lenses||Four Thirds lenses|
|Launch Date||September 2014||May 2008|
|Launch Price||USD 2,299||USD 699|
|Sensor Specs||Nikon D750||Olympus E-520|
|Sensor Format||Full Frame Sensor||Four Thirds Sensor|
|Sensor Size||35.9 x 24.0 mm||17.3 x 13.0 mm|
|Sensor Area||861.6 mm2||224.9 mm2|
|Sensor Diagonal||43.2 mm||21.6 mm|
|Sensor Resolution||24.2 Megapixels||10 Megapixels|
|Image Resolution||6016 x 4016 pixels||3648 x 2736 pixels|
|Pixel Pitch||5.97 μm||4.74 μm|
|Pixel Density||2.80 MP/cm2||4.44 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||no Video|
|ISO Setting||100 - 12,800 ISO||100 - 1,600 ISO|
|ISO Boost||50 - 51,200 ISO||no Enhancement|
|Image Processor||EXPEED 4||TruePic III|
|DXO Sensor Quality (score)||93||55|
|DXO Color Depth (bits)||24.8||21.4|
|DXO Dynamic Range (EV)||14.5||10.4|
|DXO Low Light (ISO)||2956||548|
|Screen Specs||Nikon D750||Olympus E-520|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%||95%|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.2inch||2.7inch|
|LCD Resolution||1229k dots||215k dots|
|LCD Attachment||Tilting screen||Fixed screen|
|Shooting Specs||Nikon D750||Olympus E-520|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||6 shutter flaps/s||3.5 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||CF or XD cards|
|Second Storage Option||Dual card slots||Dual card slots|
|Connectivity Specs||Nikon D750||Olympus E-520|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||no HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Headphone Socket||Headphone port||no Headphone port|
|Wifi Support||Wifi built-in||no Wifi|
|Body Specs||Nikon D750||Olympus E-520|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||1230 shots per charge||750 shots per charge|
141 x 113 x 78 mm
(5.6 x 4.4 x 3.1 in)
136 x 92 x 68 mm
(5.4 x 3.6 x 2.7 in)
|Camera Weight||750 g (26.5 oz)||535 g (18.9 oz)|
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