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Olympus E-P1 vs E-520

The Olympus PEN E-P1 and the Olympus E-520 are two digital cameras that were officially introduced, respectively, in June 2009 and May 2008. The E-P1 is a mirrorless interchangeable lens camera, while the E-520 is a DSLR. Both cameras are equipped with a Four Thirds sensor. The E-P1 has a resolution of 12.2 megapixels, whereas the E-520 provides 10 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Olympus E-P1
versus
Olympus E-520
Olympus E-P1   Olympus E-520
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Four Thirds lenses
12.2 MP – Four Thirds sensor 10 MP – Four Thirds sensor
720/30p Video no Video
ISO 100-6,400 ISO 100-1,600
No viewfinder, LCD framing Optical viewfinder
3.0" LCD – 230k dots 2.7" LCD – 215k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
3 shutter flaps per second 3.5 shutter flaps per second
In-body stabilizationIn-body stabilization
300 shots per battery charge750 shots per battery charge
121 x 70 x 36 mm, 355 g 136 x 92 x 68 mm, 535 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus PEN E-P1 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.

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Body comparison

The side-by-side display below illustrates the physical size and weight of the Olympus E-P1 and the Olympus E-520. 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 dimensions are rounded to the nearest millimeter.

The E-P1 can be obtained in three different colors (black, silver, white), while the E-520 is only available in black.

Size Olympus E-P1 vs Olympus E-520
Compare E-P1 versus E-520 top
Comparison E-P1 or E-520 rear

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 considerably larger (48 percent) than the Olympus E-P1. Moreover, the E-520 is substantially heavier (51 percent) than the E-P1. In this context, it is worth noting that neither the E-P1 nor the E-520 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (E-P1) and the Four Thirds Lens Catalog (E-520). Mirrorless cameras, such as the Olympus E-P1, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.

Concerning battery life, the E-P1 gets 300 shots out of its Olympus BLS-1 battery, while the E-520 can take 750 images on a single charge of its Olympus BLM-1 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-P1 121 mm 70 mm 36 mm 355 g 300 n Jun 2009 799ebay.com
2.
 
Olympus E-520 136 mm 92 mm 68 mm 535 g 750 n May 2008 699ebay.com
3.
 
Olympus E-P3 122 mm 69 mm 34 mm 369 g 330 n Jun 2011 799ebay.com
4.
 
Olympus E-PL2 114 mm 72 mm 42 mm 362 g 280 n Jan 2011 599ebay.com
5.
 
Olympus E-PL3 110 mm 64 mm 37 mm 313 g 300 n Jun 2011 599ebay.com
6.
 
Olympus E-PL1 115 mm 72 mm 42 mm 334 g 290 n Feb 2010 599ebay.com
7.
 
Olympus E-600 130 mm 94 mm 60 mm 535 g 500 n Aug 2009 449ebay.com
8.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
9.
 
Olympus E-P2 121 mm 70 mm 36 mm 355 g 300 n Nov 2009 799ebay.com
10.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 n Mar 2008 599ebay.com
11.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
12.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
13.
 
Panasonic G10 124 mm 84 mm 74 mm 388 g 380 n Mar 2010 499ebay.com
14.
 
Panasonic GF1 119 mm 71 mm 36 mm 385 g 380 n Sep 2009 749ebay.com
15.
 
Panasonic GH1 124 mm 90 mm 45 mm 385 g 300 n Mar 2009 899ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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 E-520 was launched at a somewhat lower price (by 13 percent) than the E-P1, 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.

Sensor comparison

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 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. 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 more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

In terms of chip-set technology, the E-P1 uses a more advanced image processing engine (TruePic V) than the E-520 (TruePic III), with benefits for noise reduction, color accuracy, and processing speed.

Olympus E-P1 and Olympus E-520 sensor measures

While the two cameras under review share the same sensor size, the E-P1 offers a higher resolution of 12.2 megapixels, compared with 10 MP of the E-520. This megapixels advantage translates into a 11 percent gain in linear resolution. On the other hand, these sensor specs imply that the E-P1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.29μm versus 4.74μm for the E-520). In this context, it should be noted, however, that the E-P1 is a somewhat more recent model (by 1 year and 1 month) than the E-520, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.

The resolution advantage of the Olympus E-P1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-P1 for good quality output (200 dots per inch) amounts to 20.2 x 15.1 inches or 51.2 x 38.4 cm, for very good quality (250 dpi) 16.1 x 12.1 inches or 41 x 30.7 cm, and for excellent quality (300 dpi) 13.4 x 10.1 inches or 34.1 x 25.6 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 Olympus PEN E-P1 has a native sensitivity range from ISO 100 to ISO 6400. The corresponding ISO settings for the Olympus E-520 are ISO 100 to ISO 1600 (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.

E-P1 versus E-520 MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-P1 Four Thirds 12.2 4032 3024720/30p21.410.453655
2.
 
Olympus E-520 Four Thirds 10.0 3648 2736none21.410.454855
3.
 
Olympus E-P3 Four Thirds 12.2 4032 30241080/60i20.810.153651
4.
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
5.
 
Olympus E-PL3 Four Thirds 12.2 4032 30241080/60i20.910.349952
6.
 
Olympus E-PL1 Four Thirds 12.2 4032 3024720/30p21.510.148754
7.
 
Olympus E-600 Four Thirds 12.2 4032 3024none21.510.354155
8.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
9.
 
Olympus E-P2 Four Thirds 12.2 4032 3024720/30p21.510.450556
10.
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
11.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
12.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
13.
 
Panasonic G10 Four Thirds 12.0 4000 3000720/30p21.210.141152
14.
 
Panasonic GF1 Four Thirds 12.0 4000 3000720/30p21.210.351354
15.
 
Panasonic GH1 Four Thirds 12.0 4000 30001080/24p21.611.677264
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Many modern cameras cannot only take still pictures, but also record videos. The E-P1 indeed provides movie recording capabilities, while the E-520 does not. The highest resolution format that the E-P1 can use is 720/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-520 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the E-P1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Olympus E-P1 and Olympus E-520 along with similar information for a selection of comparators.

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Core Features
# image 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.
 
Olympus E-P1none n3.0 / 230 fixed n 1/4000s 3.0/s n Y
2.
 
Olympus E-520optical n2.7 / 215 fixed n 1/4000s 3.5/s Y Y
3.
 
Olympus E-P3optional n3.0 / 614 fixed Y 1/4000s 3.0/s Y Y
4.
 
Olympus E-PL2optional n3.0 / 460 fixed n 1/4000s 3.0/s Y Y
5.
 
Olympus E-PL3optional n3.0 / 460 tilting n 1/4000s 5.5/s n Y
6.
 
Olympus E-PL1optional n2.7 / 230 fixed n 1/2000s 3.0/s Y Y
7.
 
Olympus E-600optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
8.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
9.
 
Olympus E-P2optional n3.0 / 230 fixed n 1/4000s 3.0/s n Y
10.
 
Olympus E-420optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
11.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
12.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
13.
 
Panasonic G10202 n3.0 / 460 fixed n 1/4000s 2.6/s Y n
14.
 
Panasonic GF1optional n3.0 / 460 fixed n 1/4000s 3.0/s Y n
15.
 
Panasonic GH11440 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The E-520 has one, while the E-P1 does not. While the built-in flash of the E-520 is not very powerful, it can at times be useful as a fill-in light.

The E-P1 writes its imaging data to SDHC cards, while the E-520 uses Compact Flash or xD Picture cards. The E-520 features dual card slots, which can be very useful in case a memory card fails. In contrast, the E-P1 only has one slot.

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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 Olympus PEN E-P1 and Olympus E-520 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-P1Ystereo / ---mini2.0---
2.
 
Olympus E-520Y- / ----2.0---
3.
 
Olympus E-P3Ystereo / ---mini2.0---
4.
 
Olympus E-PL2Ystereo / ---mini2.0---
5.
 
Olympus E-PL3Ystereo / ---mini2.0---
6.
 
Olympus E-PL1Ystereo / ---mini2.0---
7.
 
Olympus E-600Y- / ----2.0---
8.
 
Olympus E-620Y- / ----2.0---
9.
 
Olympus E-P2Ystereo / ---mini2.0---
10.
 
Olympus E-420Y- / ----2.0---
11.
 
Olympus E-410Y- / ----2.0---
12.
 
Olympus E-510Y- / ----2.0---
13.
 
Panasonic G10Ymono / ---mini2.0---
14.
 
Panasonic GF1Ymono / mono--mini2.0---
15.
 
Panasonic GH1Ystereo / -Y-mini2.0---
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Both the E-P1 and the E-520 have been discontinued, but can regularly be found used on ebay. The E-P1 was replaced by the Olympus E-P2, while the E-520 does not have a direct successor. Further information on the features and operation of the E-P1 and E-520 can be found, respectively, in the Olympus E-P1 Manual (free pdf) or the online Olympus E-520 Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Olympus E-P1 and the Olympus E-520? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.


Advantages of the Olympus PEN E-P1:

  • More detail: Offers more megapixels (12.2 vs 10MP) with a 11% higher linear resolution.
  • Better jpgs: Has a more modern image processing engine (TruePic V vs TruePic III).
  • Broader imaging potential: Can record not only still images but also 720/30p movies.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
  • More compact: Is smaller (121x70mm vs 136x92mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 180g or 34 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More modern: Is somewhat more recent (announced 1 year and 1 month after the E-520).


Arguments in favor of the Olympus E-520:

  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Faster burst: Shoots at higher frequency (3.5 vs 3 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (750 versus 300) out of a single battery charge.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More affordable: Was released into a lower priced segment (13 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in May 2008).

If the count of relative strengths (bullet points above) is taken as a measure, the E-P1 comes out slightly ahead of the E-520 (8 : 7 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.

E-P1 08:07 E-520

How about other alternatives? Do the specifications of the Olympus E-P1 and the Olympus E-520 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings 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 says little about, for example, the shooting experience and imaging performance of the E-P1 and the E-520 in practical situations. 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.

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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-P1..+..66/1004/54.5/5 Jun 2009 799ebay.com
2.
 
Olympus E-520..87/100..+ +4.5/54.5/5 May 2008 699ebay.com
3.
 
Olympus E-P3..83/100..74/1004.5/54.5/5 Jun 2011 799ebay.com
4.
 
Olympus E-PL23/583/100..71/1004.5/54.5/5 Jan 2011 599ebay.com
5.
 
Olympus E-PL33/5+ +..72/1004.5/54/5 Jun 2011 599ebay.com
6.
 
Olympus E-PL1..86/100..69/1004/54.5/5 Feb 2010 599ebay.com
7.
 
Olympus E-600..........4.5/5 Aug 2009 449ebay.com
8.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
9.
 
Olympus E-P23/5+..69/1004/54.5/5 Nov 2009 799ebay.com
10.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 599ebay.com
11.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
12.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
13.
 
Panasonic G103/5....70/1004/54/5 Mar 2010 499ebay.com
14.
 
Panasonic GF1..85/100..69/1004.5/54.5/5 Sep 2009 749ebay.com
15.
 
Panasonic GH1..+ +..72/1004.5/54.5/5 Mar 2009 899ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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.

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    Specifications: Olympus E-P1 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 Specifications
    Camera Model Olympus E-P1 Olympus E-520
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Four Thirds lenses
    Launch Date June 2009 May 2008
    Launch Price USD 799 USD 699
    Sensor Specs Olympus E-P1 Olympus E-520
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Four Thirds Sensor
    Sensor Size 17.3 x 13.0 mm 17.3 x 13.0 mm
    Sensor Area 224.9 mm2 224.9 mm2
    Sensor Diagonal 21.6 mm 21.6 mm
    Crop Factor 2.0x 2.0x
    Sensor Resolution 12.2 Megapixels 10 Megapixels
    Image Resolution 4032 x 3024 pixels 3648 x 2736 pixels
    Pixel Pitch 4.29 μm 4.74 μm
    Pixel Density 5.42 MP/cm2 4.44 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 720/30p Video no Video
    ISO Setting 100 - 6,400 ISO 100 - 1,600 ISO
    Image Processor TruePic V TruePic III
    DXO Sensor Quality (score) 55 55
    DXO Color Depth (bits) 21.4 21.4
    DXO Dynamic Range (EV) 10.4 10.4
    DXO Low Light (ISO) 536 548
    Screen Specs Olympus E-P1 Olympus E-520
    Viewfinder Type no viewfinder Optical viewfinder
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.46x
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 2.7inch
    LCD Resolution 230k dots 215k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Olympus E-P1 Olympus E-520
    Focus System Contrast-detect AF Phase-detect AF
    Continuous Shooting 3 shutter flaps/s 3.5 shutter flaps/s
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDHC cards CF or XD cards
    Single or Dual Card Slots Single card slot Dual card slots
    Connectivity Specs Olympus E-P1 Olympus E-520
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Olympus E-P1 Olympus E-520
    Battery Type Olympus BLS-1 Olympus BLM-1
    Battery Life (CIPA)300 shots per charge750 shots per charge
    Body Dimensions 121 x 70 x 36 mm
    (4.8 x 2.8 x 1.4 in)
    136 x 92 x 68 mm
    (5.4 x 3.6 x 2.7 in)
    Camera Weight 355 g (12.5 oz) 535 g (18.9 oz)
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