Olympus E-P1 vs XZ-1

The Olympus PEN E-P1 and the Olympus XZ-1 are two digital cameras that were announced, respectively, in June 2009 and January 2011. The E-P1 is a mirrorless interchangeable lens camera, while the XZ-1 is a fixed lens compact. The cameras are based on a Four Thirds (E-P1) and a 1/1.7-inch (XZ-1) sensor. The E-P1 has a resolution of 12.2 megapixels, whereas the XZ-1 provides 10.1 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		Olympus XZ-1
Mirrorless system camera		Fixed lens compact camera
Micro Four Thirds lenses		28-112mm f/1.8-2.5
12.2 MP – Four Thirds sensor		10.1 MP – 1/1.7" sensor
720/30p Video		720/30p Video
ISO 100-6,400		ISO 100-6,400
No viewfinder, LCD framing		Viewfinder optional
3.0" LCD – 230k dots		3.0" LCD – 614k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
3 shutter flaps per second		2 shutter flaps per second
In-body stabilization		In-body stabilization
300 shots per battery charge		320 shots per battery charge
121 x 70 x 36 mm, 355 g		111 x 65 x 42 mm, 275 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 XZ-1? 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

The side-by-side display below illustrates the physical size and weight of the Olympus E-P1 and the Olympus XZ-1. 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 measures are rounded to the nearest millimeter.

The E-P1 can be obtained in three different colors (black, silver, white), while the XZ-1 is available in two color-versions (black, white).

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus XZ-1 is notably smaller (15 percent) than the Olympus E-P1. In this context, it is worth noting that neither the E-P1 nor the XZ-1 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the XZ-1 has a lens built in, whereas the E-P1 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the E-P1 and their specifications in the Micro Four Thirds Lens Catalog.

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.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Olympus E-P1	121 mm	70 mm	36 mm	355 g	300	n	Jun 2009	US$ 799	ebay.com
2.		Olympus XZ-1	111 mm	65 mm	42 mm	275 g	320	n	Jan 2011	US$ 499	ebay.com
3.		Olympus E-520	136 mm	92 mm	68 mm	535 g	750	n	May 2008	US$ 699	ebay.com
4.		Olympus E-620	130 mm	94 mm	60 mm	521 g	500	n	Feb 2009	US$ 699	ebay.com
5.		Olympus E-M10	119 mm	82 mm	46 mm	396 g	320	n	Jan 2014	US$ 699	ebay.com
6.		Olympus E-P2	121 mm	70 mm	36 mm	355 g	300	n	Nov 2009	US$ 799	ebay.com
7.		Olympus E-P3	122 mm	69 mm	34 mm	369 g	330	n	Jun 2011	US$ 799	ebay.com
8.		Olympus E-PL1	115 mm	72 mm	42 mm	334 g	290	n	Feb 2010	US$ 599	ebay.com
9.		Olympus E-PL2	114 mm	72 mm	42 mm	362 g	280	n	Jan 2011	US$ 599	ebay.com
10.		Olympus E-PL3	110 mm	64 mm	37 mm	313 g	300	n	Jun 2011	US$ 599	ebay.com
11.		Olympus E-PM1	110 mm	64 mm	34 mm	265 g	330	n	Jun 2011	US$ 499	ebay.com
12.		Olympus XZ-2	113 mm	65 mm	48 mm	346 g	340	n	Sep 2012	US$ 599	ebay.com
13.		Panasonic GF1	119 mm	71 mm	36 mm	385 g	380	n	Sep 2009	US$ 749	ebay.com
14.		Panasonic GH1	124 mm	90 mm	45 mm	385 g	300	n	Mar 2009	US$ 899	ebay.com
15.		Panasonic LX5	110 mm	65 mm	43 mm	271 g	400	n	Jul 2010	US$ 499	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

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 XZ-1 was launched at a lower price than the E-P1, despite having a lens built in. 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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Olympus E-P1 features a Four Thirds sensor and the Olympus XZ-1 a 1/1.7-inch sensor. The sensor area in the XZ-1 is 80 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 4.4. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

With 12.2MP, the E-P1 offers a higher resolution than the XZ-1 (10.1MP), but the E-P1 nevertheless has larger individual pixels (pixel pitch of 4.29μm versus 2.13μm for the XZ-1) due to its larger sensor. However, the XZ-1 is a somewhat more recent model (by 1 year and 6 months) than the E-P1, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels.

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 XZ-1 are 18.3 x 13.8 inches or 46.5 x 35 cm for good quality, 14.7 x 11 inches or 37.2 x 28 cm for very good quality, and 12.2 x 9.2 inches or 31 x 23.3 cm for excellent quality prints.

The Olympus PEN E-P1 has a native sensitivity range from ISO 100 to ISO 6400. The Olympus XZ-1 offers exactly the same ISO settings.

In terms of underlying technology, the E-P1 is build around a CMOS sensor, while the XZ-1 uses a CCD imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

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. Of the two cameras under review, the E-P1 provides substantially higher image quality than the XZ-1, with an overall score that is 21 points higher. This advantage is based on 2.6 bits higher color depth, and 2.2 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.

Sensor Characteristics

		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	3024	720/30p	21.4	10.4	536	55
2.		Olympus XZ-1	1/1.7	10.1	3664	2752	720/30p	18.8	10.4	117	34
3.		Olympus E-520	Four Thirds	10.0	3648	2736	none	21.4	10.4	548	55
4.		Olympus E-620	Four Thirds	12.2	4032	3024	none	21.3	10.3	536	55
5.		Olympus E-M10	Four Thirds	15.9	4608	3456	1080/30p	22.8	12.3	884	72
6.		Olympus E-P2	Four Thirds	12.2	4032	3024	720/30p	21.5	10.4	505	56
7.		Olympus E-P3	Four Thirds	12.2	4032	3024	1080/60i	20.8	10.1	536	51
8.		Olympus E-PL1	Four Thirds	12.2	4032	3024	720/30p	21.5	10.1	487	54
9.		Olympus E-PL2	Four Thirds	12.2	4032	3024	720/30p	21.4	10.2	573	55
10.		Olympus E-PL3	Four Thirds	12.2	4032	3024	1080/60i	20.9	10.3	499	52
11.		Olympus E-PM1	Four Thirds	12.2	4032	3024	1080/60i	21.0	10.3	499	52
12.		Olympus XZ-2	1/1.7	11.8	3968	2976	1080/30p	20.4	11.3	216	49
13.		Panasonic GF1	Four Thirds	12.0	4000	3000	720/30p	21.2	10.3	513	54
14.		Panasonic GH1	Four Thirds	12.0	4000	3000	1080/24p	21.6	11.6	772	64
15.		Panasonic LX5	1/1.7	10.0	3648	2736	720/60p	19.6	10.8	132	41

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, and both provide the same movie specifications (720/30p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The E-P1 and the XZ-1 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 XZ-1 can be equipped with an optional viewfinder – the VF-2. The following table reports on some other key feature differences and similarities of the Olympus E-P1, the Olympus XZ-1, and comparable cameras.

Core Features

		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-P1	none	n	3.0 / 230	fixed	n	1/4000s	3.0/s	n	Y
2.		Olympus XZ-1	optional	n	3.0 / 614	fixed	n	1/2000s	2.0/s	Y	Y
3.		Olympus E-520	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	Y
4.		Olympus E-620	optical	n	2.7 / 230	swivel	n	1/4000s	4.0/s	Y	Y
5.		Olympus E-M10	1440	n	3.0 / 1037	tilting	Y	1/4000s	8.0/s	Y	Y
6.		Olympus E-P2	optional	n	3.0 / 230	fixed	n	1/4000s	3.0/s	n	Y
7.		Olympus E-P3	optional	n	3.0 / 614	fixed	Y	1/4000s	3.0/s	Y	Y
8.		Olympus E-PL1	optional	n	2.7 / 230	fixed	n	1/2000s	3.0/s	Y	Y
9.		Olympus E-PL2	optional	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	Y
10.		Olympus E-PL3	optional	n	3.0 / 460	tilting	n	1/4000s	5.5/s	n	Y
11.		Olympus E-PM1	optional	n	3.0 / 460	fixed	n	1/4000s	5.5/s	n	Y
12.		Olympus XZ-2	optional	n	3.0 / 920	tilting	Y	1/2000s	5.0/s	Y	Y
13.		Panasonic GF1	optional	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
14.		Panasonic GH1	1440	n	3.0 / 460	swivel	n	1/4000s	3.0/s	Y	n
15.		Panasonic LX5	optional	n	3.0 / 460	fixed	n	1/4000s	2.5/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The XZ-1 has one, while the E-P1 does not. While the built-in flash of the XZ-1 is not very powerful, it can at times be useful as a fill-in light.

The Olympus XZ-1 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 E-P1 writes its imaging data to SDHC cards, while the XZ-1 uses SDXC 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 Olympus PEN E-P1 and Olympus XZ-1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections

		Camera Model	Hotshoe Port	Internal Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Olympus E-P1	Y	stereo / -	-	-	mini	2.0	-	-	-
2.		Olympus XZ-1	Y	mono / -	-	-	mini	2.0	-	-	-
3.		Olympus E-520	Y	- / -	-	-	-	2.0	-	-	-
4.		Olympus E-620	Y	- / -	-	-	-	2.0	-	-	-
5.		Olympus E-M10	Y	stereo / mono	-	-	micro	2.0	Y	-	-
6.		Olympus E-P2	Y	stereo / -	-	-	mini	2.0	-	-	-
7.		Olympus E-P3	Y	stereo / -	-	-	mini	2.0	-	-	-
8.		Olympus E-PL1	Y	stereo / -	-	-	mini	2.0	-	-	-
9.		Olympus E-PL2	Y	stereo / -	-	-	mini	2.0	-	-	-
10.		Olympus E-PL3	Y	stereo / -	-	-	mini	2.0	-	-	-
11.		Olympus E-PM1	Y	stereo / mono	-	-	mini	2.0	-	-	-
12.		Olympus XZ-2	Y	stereo / mono	-	-	mini	2.0	-	-	-
13.		Panasonic GF1	Y	mono / mono	-	-	mini	2.0	-	-	-
14.		Panasonic GH1	Y	stereo / -	Y	-	mini	2.0	-	-	-
15.		Panasonic LX5	Y	mono / mono	-	-	mini	2.0	-	-	-

Both the E-P1 and the XZ-1 have been discontinued, but can regularly be found used on ebay. The E-P1 was replaced by the Olympus E-P2, while the XZ-1 was followed by the Olympus XZ-2. Further information on the features and operation of the E-P1 and XZ-1 can be found, respectively, in the Olympus E-P1 Manual (free pdf) or the online Olympus XZ-1 Manual.

Review summary

So how do things add up? Is the Olympus E-P1 better than the Olympus XZ-1 or vice versa? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Olympus PEN E-P1:

• More detail: Offers more megapixels (12.2 vs 10.1MP) with a 10% higher linear resolution.
• Better image quality: Scores substantially higher (21 points) in the DXO overall assessment.
• Richer colors: Generates images with noticeably better colors (2.6 bits more color depth).
• Better low-light sensitivity: Requires less light for good images (2.2 stops ISO advantage).
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
• Faster burst: Shoots at higher frequency (3 vs 2 flaps/sec) to capture the decisive moment.
• More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
• More heavily discounted: Has been on the market for longer (launched in June 2009).

Arguments in favor of the Olympus XZ-1:

• More framing options: Can be equipped with a hotshoe-mounted accessory-viewfinder.
• More detailed LCD: Has a higher resolution rear screen (614k vs 230k dots).
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Ready to shoot: Has an integrated lens, whereas the E-P1 necessitates an extra lens.
• More compact: Is smaller (111x65mm vs 121x70mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the E-P1).
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More modern: Was introduced somewhat (1 year and 6 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the XZ-1 comes out slightly ahead of the E-P1 (9 : 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-P1 and the Olympus XZ-1 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Travel-Zoom 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-P1 or the XZ-1 perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		Olympus E-P1	..	+	..	66/100	4/5	4.5/5	Jun 2009	US$ 799	ebay.com
2.		Olympus XZ-1	4/5	..	..	74/100	4.5/5	4.5/5	Jan 2011	US$ 499	ebay.com
3.		Olympus E-520	..	87/100	..	+ +	4.5/5	4.5/5	May 2008	US$ 699	ebay.com
4.		Olympus E-620	3/5	88/100	..	72/100	4.5/5	5/5	Feb 2009	US$ 699	ebay.com
5.		Olympus E-M10	4/5	..	..	80/100	5/5	5/5	Jan 2014	US$ 699	ebay.com
6.		Olympus E-P2	3/5	+	..	69/100	4/5	4.5/5	Nov 2009	US$ 799	ebay.com
7.		Olympus E-P3	..	83/100	..	74/100	4.5/5	4.5/5	Jun 2011	US$ 799	ebay.com
8.		Olympus E-PL1	..	86/100	..	69/100	4/5	4.5/5	Feb 2010	US$ 599	ebay.com
9.		Olympus E-PL2	3/5	83/100	..	71/100	4.5/5	4.5/5	Jan 2011	US$ 599	ebay.com
10.		Olympus E-PL3	3/5	+ +	..	72/100	4.5/5	4/5	Jun 2011	US$ 599	ebay.com
11.		Olympus E-PM1	..	86/100	..	71/100	4.5/5	4.5/5	Jun 2011	US$ 499	ebay.com
12.		Olympus XZ-2	4/5	+	..	..	4.5/5	4.5/5	Sep 2012	US$ 599	ebay.com
13.		Panasonic GF1	..	85/100	..	69/100	4.5/5	4.5/5	Sep 2009	US$ 749	ebay.com
14.		Panasonic GH1	..	+ +	..	72/100	4.5/5	4.5/5	Mar 2009	US$ 899	ebay.com
15.		Panasonic LX5	4/5	+	..	73/100	4.5/5	4.5/5	Jul 2010	US$ 499	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, 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 comparisons of ratings among very different cameras or across long time periods have little meaning. 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

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