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Olympus E-PM1 vs E-P1

The Olympus PEN E-PM1 and the Olympus PEN E-P1 are two digital cameras that were announced, respectively, in June 2011 and June 2009. Both the E-PM1 and the E-P1 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. Both cameras offer a resolution of 12.2 megapixels.

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

Headline Specifications
Olympus E-PM1
versus
Olympus E-P1
Olympus E-PM1   Olympus E-P1
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Micro Four Thirds lenses
12.2 MP – Four Thirds sensor 12.2 MP – Four Thirds sensor
1080/60i Video 720/30p Video
ISO 100-12,800 ISO 100-6,400
Viewfinder optional No viewfinder, LCD framing
3.0" LCD – 460k dots 3.0" LCD – 230k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
5.5 shutter flaps per second 3 shutter flaps per second
In-body stabilizationIn-body stabilization
330 shots per battery charge300 shots per battery charge
110 x 64 x 34 mm, 265 g 121 x 70 x 36 mm, 355 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus PEN E-PM1 and the Olympus PEN E-P1? 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-PM1 and the Olympus E-P1. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The E-PM1 can be obtained in six different colors (black, silver, brown, pink, purple, white), while the E-P1 is available in three color-versions (black, silver, white).

Size Olympus E-PM1 vs Olympus E-P1
Compare E-PM1 versus E-P1 top
Comparison E-PM1 or E-P1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-P1 is notably larger (20 percent) than the Olympus E-PM1. Moreover, the E-P1 is markedly heavier (34 percent) than the E-PM1. In this context, it is worth noting that neither the E-PM1 nor the E-P1 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Micro Four Thirds Lens Catalog. Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the E-PM1 gets 330 shots out of its Olympus BLS-5 battery, while the E-P1 can take 300 images on a single charge of its Olympus BLS-1 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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-PM1 110 mm 64 mm 34 mm 265 g 330 n Jun 2011 499ebay.com
2.
 
Olympus E-P1 121 mm 70 mm 36 mm 355 g 300 n Jun 2009 799ebay.com
3.
 
Olympus E-PL5 111 mm 64 mm 38 mm 325 g 360 n Sep 2012 599ebay.com
4.
 
Olympus E-PM2 110 mm 64 mm 34 mm 269 g 360 n Sep 2012 499ebay.com
5.
 
Olympus E-P3 122 mm 69 mm 34 mm 369 g 330 n Jun 2011 799ebay.com
6.
 
Olympus E-PL2 114 mm 72 mm 42 mm 362 g 280 n Jan 2011 599ebay.com
7.
 
Olympus E-PL3 110 mm 64 mm 37 mm 313 g 300 n Jun 2011 599ebay.com
8.
 
Olympus E-PL1 115 mm 72 mm 42 mm 334 g 290 n Feb 2010 599ebay.com
9.
 
Olympus E-P2 121 mm 70 mm 36 mm 355 g 300 n Nov 2009 799ebay.com
10.
 
Panasonic GF5 108 mm 67 mm 37 mm 267 g 360 n Apr 2012 499ebay.com
11.
 
Panasonic GF3 108 mm 67 mm 32 mm 264 g 300 n Jun 2011 549ebay.com
12.
 
Panasonic G2 124 mm 84 mm 74 mm 428 g 360 n Mar 2010 599ebay.com
13.
 
Panasonic GF2 113 mm 68 mm 33 mm 310 g 300 n Nov 2010 549ebay.com
14.
 
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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Any camera decision will naturally be influenced heavily by the price. 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 E-PM1 was launched at a markedly lower price (by 38 percent) than the E-P1, 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.

Sensor comparison

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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to 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-PM1 uses a more advanced image processing engine (TruePic VI) than the E-P1 (TruePic V), with benefits for noise reduction, color accuracy, and processing speed.

Olympus E-PM1 and Olympus E-P1 sensor measures

The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 12.2 megapixels. This similarity in sensor specs implies that both the E-PM1 and the E-P1 have the same pixel density, as well as the same pixel size. It should, however, be noted that the E-PM1 is much more recent (by 2 years) than the E-P1, and its sensor will have benefitted from technological advances during this time.

The Olympus PEN E-PM1 has a native sensitivity range from ISO 100 to ISO 12800. The corresponding ISO settings for the Olympus PEN E-P1 are ISO 100 to ISO 6400 (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-PM1 versus E-P1 MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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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-PM1 Four Thirds 12.2 4032 30241080/60i21.010.349952
2.
 
Olympus E-P1 Four Thirds 12.2 4032 3024720/30p21.410.453655
3.
 
Olympus E-PL5 Four Thirds 15.9 4608 34561080/30p22.812.388972
4.
 
Olympus E-PM2 Four Thirds 15.9 4608 34561080/30p22.712.293272
5.
 
Olympus E-P3 Four Thirds 12.2 4032 30241080/60i20.810.153651
6.
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
7.
 
Olympus E-PL3 Four Thirds 12.2 4032 30241080/60i20.910.349952
8.
 
Olympus E-PL1 Four Thirds 12.2 4032 3024720/30p21.510.148754
9.
 
Olympus E-P2 Four Thirds 12.2 4032 3024720/30p21.510.450556
10.
 
Panasonic GF5 Four Thirds 12.0 4000 30001080/60i20.510.057350
11.
 
Panasonic GF3 Four Thirds 12.0 4000 30001080/60i20.610.145950
12.
 
Panasonic G2 Four Thirds 12.0 4000 3000720/30p21.210.349353
13.
 
Panasonic GF2 Four Thirds 12.0 4000 30001080/60i21.210.350654
14.
 
Panasonic GH1 Four Thirds 12.0 4000 30001080/24p21.611.677264
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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-PM1 provides a higher video resolution than the E-P1. It can shoot video footage at 1080/60i, while the E-P1 is limited to 720/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The E-PM1 and the E-P1 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. That said, the E-PM1 can be equipped with an optional viewfinder – the VF-2. The table below summarizes some of the other core capabilities of the Olympus E-PM1 and Olympus E-P1 in connection with corresponding information for a sample of similar cameras.

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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-PM1optional n3.0 / 460 fixed n 1/4000s 5.5/s n Y
2.
 
Olympus E-P1none n3.0 / 230 fixed n 1/4000s 3.0/s n Y
3.
 
Olympus E-PL5optional n3.0 / 460 tilting Y 1/4000s 8.0/s n Y
4.
 
Olympus E-PM2optional n3.0 / 460 fixed Y 1/4000s 8.0/s n Y
5.
 
Olympus E-P3optional n3.0 / 614 fixed Y 1/4000s 3.0/s Y Y
6.
 
Olympus E-PL2optional n3.0 / 460 fixed n 1/4000s 3.0/s Y Y
7.
 
Olympus E-PL3optional n3.0 / 460 tilting n 1/4000s 5.5/s n Y
8.
 
Olympus E-PL1optional n2.7 / 230 fixed n 1/2000s 3.0/s Y Y
9.
 
Olympus E-P2optional n3.0 / 230 fixed n 1/4000s 3.0/s n Y
10.
 
Panasonic GF5none n3.0 / 920 fixed Y 1/4000s 4.0/s Y n
11.
 
Panasonic GF3none n3.0 / 460 fixed Y 1/4000s 3.2/s Y n
12.
 
Panasonic G21440 n3.0 / 460 swivel Y 1/4000s 2.6/s Y n
13.
 
Panasonic GF2optional n3.0 / 460 fixed Y 1/4000s 2.6/s Y n
14.
 
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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The E-PM1 writes its imaging data to SDXC cards, while the E-P1 uses SDHC cards.

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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-PM1 and Olympus PEN E-P1 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-PM1Ystereo / mono--mini2.0---
2.
 
Olympus E-P1Ystereo / ---mini2.0---
3.
 
Olympus E-PL5Ystereo / mono--mini2.0---
4.
 
Olympus E-PM2Ystereo / mono--mini2.0---
5.
 
Olympus E-P3Ystereo / ---mini2.0---
6.
 
Olympus E-PL2Ystereo / ---mini2.0---
7.
 
Olympus E-PL3Ystereo / ---mini2.0---
8.
 
Olympus E-PL1Ystereo / ---mini2.0---
9.
 
Olympus E-P2Ystereo / ---mini2.0---
10.
 
Panasonic GF5-stereo / mono--mini2.0---
11.
 
Panasonic GF3-stereo / mono--mini2.0---
12.
 
Panasonic G2Ystereo / mono--mini2.0---
13.
 
Panasonic GF2Ystereo / mono--mini2.0---
14.
 
Panasonic GH1Ystereo / -Y-mini2.0---
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Both the E-PM1 and the E-P1 have been discontinued, but can regularly be found used on ebay. The E-P1 was replaced by the Olympus E-P2, while the E-PM1 was followed by the Olympus E-PM2. Further information on the features and operation of the E-PM1 and E-P1 can be found, respectively, in the Olympus E-PM1 Manual (free pdf) or the online Olympus E-P1 Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Olympus E-PM1 and the Olympus E-P1? 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-PM1:

  • Better jpgs: Has a more modern image processing engine (TruePic VI vs TruePic V).
  • Better video: Provides higher definition movie capture (1080/60i vs 720/30p).
  • More framing options: Can be equipped with a hotshoe-mounted accessory-viewfinder.
  • More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
  • Faster burst: Shoots at higher frequency (5.5 vs 3 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (110x64mm vs 121x70mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 90g or 25 percent) and hence easier to carry around.
  • More affordable: Was introduced into a lower priced category (38 percent cheaper at launch).
  • More modern: Reflects 2 years of technical progress since the E-P1 launch.


Advantages of the Olympus PEN E-P1:

  • More heavily discounted: Has been around for much longer (launched in June 2009).

If the count of relative strengths (bullet points above) is taken as a measure, the E-PM1 is the clear winner of the match-up (9 : 1 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 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.

E-PM1 09:01 E-P1

How about other alternatives? Do the specifications of the Olympus E-PM1 and the Olympus E-P1 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-PM1 or the E-P1. 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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-PM1..86/100..71/1004.5/54.5/5 Jun 2011 499ebay.com
2.
 
Olympus E-P1..+..66/1004/54.5/5 Jun 2009 799ebay.com
3.
 
Olympus E-PL53/5+ +....4.5/54.5/5 Sep 2012 599ebay.com
4.
 
Olympus E-PM23/5....77/1005/54.5/5 Sep 2012 499ebay.com
5.
 
Olympus E-P3..83/100..74/1004.5/54.5/5 Jun 2011 799ebay.com
6.
 
Olympus E-PL23/583/100..71/1004.5/54.5/5 Jan 2011 599ebay.com
7.
 
Olympus E-PL33/5+ +..72/1004.5/54/5 Jun 2011 599ebay.com
8.
 
Olympus E-PL1..86/100..69/1004/54.5/5 Feb 2010 599ebay.com
9.
 
Olympus E-P23/5+..69/1004/54.5/5 Nov 2009 799ebay.com
10.
 
Panasonic GF53/5......4.5/54.5/5 Apr 2012 499ebay.com
11.
 
Panasonic GF33/582/100..71/1004.5/54/5 Jun 2011 549ebay.com
12.
 
Panasonic G2......72/1004/54.5/5 Mar 2010 599ebay.com
13.
 
Panasonic GF23/582/100..70/1004.5/54.5/5 Nov 2010 549ebay.com
14.
 
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 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. 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-PM1 vs Olympus E-P1

    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-PM1 Olympus E-P1
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Micro Four Thirds lenses
    Launch Date June 2011 June 2009
    Launch Price USD 499 USD 799
    Sensor Specs Olympus E-PM1 Olympus E-P1
    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 12.2 Megapixels
    Image Resolution 4032 x 3024 pixels 4032 x 3024 pixels
    Pixel Pitch 4.29 μm 4.29 μm
    Pixel Density 5.42 MP/cm2 5.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60i Video 720/30p Video
    ISO Setting 100 - 12,800 ISO 100 - 6,400 ISO
    Image Processor TruePic VI TruePic V
    DXO Sensor Quality (score) 52 55
    DXO Color Depth (bits) 21.0 21.4
    DXO Dynamic Range (EV) 10.3 10.4
    DXO Low Light (ISO) 499 536
    Screen Specs Olympus E-PM1 Olympus E-P1
    Viewfinder Type Viewfinder optional no viewfinder
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 460k dots 230k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Olympus E-PM1 Olympus E-P1
    Focus System Contrast-detect AF Contrast-detect AF
    Continuous Shooting 5.5 shutter flaps/s 3 shutter flaps/s
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards SDHC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support no no
    Connectivity Specs Olympus E-PM1 Olympus E-P1
    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 Olympus E-PM1 Olympus E-P1
    Battery Type Olympus BLS-5 Olympus BLS-1
    Battery Life (CIPA)330 shots per charge300 shots per charge
    Body Dimensions 110 x 64 x 34 mm
    (4.3 x 2.5 x 1.3 in)
    121 x 70 x 36 mm
    (4.8 x 2.8 x 1.4 in)
    Camera Weight 265 g (9.3 oz) 355 g (12.5 oz)
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