Olympus E-P1 vs Pentax WG-1000

The Olympus PEN E-P1 and the Pentax WG-1000 are two digital cameras that were officially introduced, respectively, in June 2009 and June 2024. The E-P1 is a mirrorless interchangeable lens camera, while the WG-1000 is a fixed lens compact. The cameras are based on a Four Thirds (E-P1) and a 1/2.3-inch (WG-1000) sensor. The Olympus has a resolution of 12.2 megapixels, whereas the Pentax provides 15.9 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		Pentax WG-1000
Mirrorless system camera		Fixed lens compact camera
Micro Four Thirds lenses		27-108mm f/3.0-6.6
12.2 MP – Four Thirds sensor		15.9 MP – 1/2.3" sensor
720/30p Video		1080/30p Video
ISO 100-6,400		ISO 100-3,200
No viewfinder, LCD framing		No viewfinder, LCD framing
3.0" LCD – 230k dots		2.7" LCD – 230k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
3 shutter flaps per second		8 shutter flaps per second
In-body stabilization		no shake reduction
not weather sealed		Waterproof body (15m)
300 shots per battery charge		300 shots per battery charge
121 x 70 x 36 mm, 355 g		116 x 69 x 51 mm, 220 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 Pentax WG-1000? 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

An illustration of the physical size and weight of the Olympus E-P1 and the Pentax WG-1000 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear 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 WG-1000 is only available in grey.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax WG-1000 is notably smaller (6 percent) than the Olympus E-P1. It is noteworthy in this context that the WG-1000 is splash and dust-proof, while the E-P1 does not feature any corresponding weather-sealing. More than that, the WG-1000 is water-proof up to 15m and can, thus, be used for underwater photography.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the WG-1000 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. 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.

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.		Pentax WG-1000	116 mm	69 mm	51 mm	220 g	300	Y	Jun 2024	US$ 229	amazon.com
3.		Fujifilm XP130	110 mm	71 mm	28 mm	207 g	240	Y	Jan 2018	US$ 229	ebay.com
4.		Nikon W300	112 mm	66 mm	29 mm	231 g	280	Y	May 2017	US$ 389	ebay.com
5.		Olympus E-520	136 mm	92 mm	68 mm	535 g	750	n	May 2008	US$ 699	ebay.com
6.		Olympus E-620	130 mm	94 mm	60 mm	521 g	500	n	Feb 2009	US$ 699	ebay.com
7.		Olympus E-P2	121 mm	70 mm	36 mm	355 g	300	n	Nov 2009	US$ 799	ebay.com
8.		Olympus E-P3	122 mm	69 mm	34 mm	369 g	330	n	Jun 2011	US$ 799	ebay.com
9.		Olympus E-PL1	115 mm	72 mm	42 mm	334 g	290	n	Feb 2010	US$ 599	ebay.com
10.		Olympus E-PL2	114 mm	72 mm	42 mm	362 g	280	n	Jan 2011	US$ 599	ebay.com
11.		Olympus E-PL3	110 mm	64 mm	37 mm	313 g	300	n	Jun 2011	US$ 599	ebay.com
12.		Panasonic G10	124 mm	84 mm	74 mm	388 g	380	n	Mar 2010	US$ 499	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.		Pentax WG-8	118 mm	66 mm	33 mm	242 g	340	Y	Jun 2024	US$ 399	amazon.com
16.		Pentax WG-90	123 mm	62 mm	30 mm	194 g	300	Y	Nov 2023	US$ 279	amazon.com
17.		Ricoh WG-60	123 mm	62 mm	30 mm	193 g	300	Y	Oct 2018	US$ 279	ebay.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 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 WG-1000 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 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-P1 features a Four Thirds sensor and the Pentax WG-1000 a 1/2.3-inch sensor. The sensor area in the WG-1000 is 88 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 5.6. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Despite having a smaller sensor, the WG-1000 offers a higher resolution of 15.9 megapixels, compared with 12.2 MP of the E-P1. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 1.33μm versus 4.29μm for the E-P1). However, it should be noted that the WG-1000 is much more recent (by 14 years and 11 months) than the E-P1, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the WG-1000 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax WG-1000 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the WG-1000 for good quality output (200 dots per inch) amounts to 23 x 17.3 inches or 58.5 x 43.9 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.8 x 35.1 cm, and for excellent quality (300 dpi) 15.4 x 11.5 inches or 39 x 29.3 cm. The corresponding values for the Olympus E-P1 are 20.2 x 15.1 inches or 51.2 x 38.4 cm for good quality, 16.1 x 12.1 inches or 41 x 30.7 cm for very good quality, and 13.4 x 10.1 inches or 34.1 x 25.6 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 Pentax WG-1000 are ISO 100 to ISO 3200 (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.

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"). 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.		Pentax WG-1000	1/2.3	15.9	4608	3456	1080/30p	20.9	12.8	1626	54
3.		Fujifilm XP130	1/2.3	15.9	4608	3456	1080/60p	20.6	12.1	1000	51
4.		Nikon W300	1/2.3	15.9	4608	3456	4K/30p	20.5	12.0	938	50
5.		Olympus E-520	Four Thirds	10.0	3648	2736	none	21.4	10.4	548	55
6.		Olympus E-620	Four Thirds	12.2	4032	3024	none	21.3	10.3	536	55
7.		Olympus E-P2	Four Thirds	12.2	4032	3024	720/30p	21.5	10.4	505	56
8.		Olympus E-P3	Four Thirds	12.2	4032	3024	1080/60i	20.8	10.1	536	51
9.		Olympus E-PL1	Four Thirds	12.2	4032	3024	720/30p	21.5	10.1	487	54
10.		Olympus E-PL2	Four Thirds	12.2	4032	3024	720/30p	21.4	10.2	573	55
11.		Olympus E-PL3	Four Thirds	12.2	4032	3024	1080/60i	20.9	10.3	499	52
12.		Panasonic G10	Four Thirds	12.0	4000	3000	720/30p	21.2	10.1	411	52
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.		Pentax WG-8	1/2.3	20.2	5184	3888	4K/30p	20.9	12.8	1626	54
16.		Pentax WG-90	1/2.3	15.9	4608	3456	1080/60p	20.9	12.8	1570	54
17.		Ricoh WG-60	1/2.3	15.9	4608	3456	1080/60p	20.6	12.2	1072	51
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the WG-1000 provides a better video resolution than the E-P1. It can shoot movie footage at 1080/30p, while the Olympus is limited to 720/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The E-P1 and the WG-1000 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. The following table reports on some other key feature differences and similarities of the Olympus E-P1, the Pentax WG-1000, 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.		Pentax WG-1000	none	n	2.7 / 230	fixed	n	1/2000s	8.0/s	Y	n
3.		Fujifilm XP130	none	n	3.0 / 920	fixed	n	1/2000s	10.0/s	Y	Y
4.		Nikon W300	none	n	3.0 / 921	fixed	n	1/4000s	7.0/s	Y	Y
5.		Olympus E-520	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	Y
6.		Olympus E-620	optical	n	2.7 / 230	swivel	n	1/4000s	4.0/s	Y	Y
7.		Olympus E-P2	optional	n	3.0 / 230	fixed	n	1/4000s	3.0/s	n	Y
8.		Olympus E-P3	optional	n	3.0 / 614	fixed	Y	1/4000s	3.0/s	Y	Y
9.		Olympus E-PL1	optional	n	2.7 / 230	fixed	n	1/2000s	3.0/s	Y	Y
10.		Olympus E-PL2	optional	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	Y
11.		Olympus E-PL3	optional	n	3.0 / 460	tilting	n	1/4000s	5.5/s	n	Y
12.		Panasonic G10	202	n	3.0 / 460	fixed	n	1/4000s	2.6/s	Y	n
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.		Pentax WG-8	none	n	3.0 / 1040	fixed	n	1/4000s	8.0/s	Y	n
16.		Pentax WG-90	none	n	2.7 / 230	fixed	n	1/4000s	8.0/s	Y	n
17.		Ricoh WG-60	none	n	2.7 / 230	fixed	n	1/4000s	8.0/s	Y	n
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 WG-1000 has one, while the E-P1 does not. While the built-in flash of the WG-1000 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 WG-1000 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 Pentax WG-1000 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.		Pentax WG-1000	-	mono / mono	-	-	-	2.0	-	-	-
3.		Fujifilm XP130	-	mono / mono	-	-	micro	2.0	Y	-	Y
4.		Nikon W300	-	stereo / mono	-	-	micro	2.0	Y	-	Y
5.		Olympus E-520	Y	- / -	-	-	-	2.0	-	-	-
6.		Olympus E-620	Y	- / -	-	-	-	2.0	-	-	-
7.		Olympus E-P2	Y	stereo / -	-	-	mini	2.0	-	-	-
8.		Olympus E-P3	Y	stereo / -	-	-	mini	2.0	-	-	-
9.		Olympus E-PL1	Y	stereo / -	-	-	mini	2.0	-	-	-
10.		Olympus E-PL2	Y	stereo / -	-	-	mini	2.0	-	-	-
11.		Olympus E-PL3	Y	stereo / -	-	-	mini	2.0	-	-	-
12.		Panasonic G10	Y	mono / -	-	-	mini	2.0	-	-	-
13.		Panasonic GF1	Y	mono / mono	-	-	mini	2.0	-	-	-
14.		Panasonic GH1	Y	stereo / -	Y	-	mini	2.0	-	-	-
15.		Pentax WG-8	-	mono / mono	-	-	-	3.0	-	-	-
16.		Pentax WG-90	-	mono / mono	-	-	micro	2.0	-	-	-
17.		Ricoh WG-60	-	mono / mono	-	-	micro	2.0	-	-	-

It is notable that the E-P1 has a hotshoe, while the WG-1000 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

The WG-1000 is a recent model that features in the current product line-up of Pentax. In contrast, the E-P1 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-P1 was succeeded by the Olympus E-P2. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Pentax websites.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Olympus E-P1 and the Pentax WG-1000? Which camera is better? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Olympus PEN E-P1:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
• Richer colors: The pixel size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
• Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
• More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
• Sharper images: Has hand-shake reducing image stabilization built-in.
• Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
• More heavily discounted: Has been available for much longer (launched in June 2009).

Reasons to prefer the Pentax WG-1000:

• More detail: Has more megapixels (15.9 vs 12.2MP), which boosts linear resolution by 14%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better video: Provides higher definition movie capture (1080/30p vs 720/30p).
• Faster burst: Shoots at higher frequency (8 vs 3 flaps/sec) to capture the decisive moment.
• Ready to shoot: Has an integrated lens, whereas the E-P1 necessitates an extra lens.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the E-P1).
• Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
• Water-proof: Is rugged and sealed and can thus be used for underwater photography (up to 15m).
• 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: Reflects 14 years and 11 months of technical progress since the E-P1 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (11 points each). 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.

How about other alternatives? Do the specifications of the Olympus E-P1 and the Pentax WG-1000 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 says little about, for example, the shooting experience and imaging performance of the E-P1 and the WG-1000 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 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.

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.		Pentax WG-1000	..	..	..	..	..	..	Jun 2024	US$ 229	amazon.com
3.		Fujifilm XP130	..	o	..	..	3.5/5	4/5	Jan 2018	US$ 229	ebay.com
4.		Nikon W300	..	+	..	..	4/5	4/5	May 2017	US$ 389	ebay.com
5.		Olympus E-520	..	87/100	..	+ +	4.5/5	4.5/5	May 2008	US$ 699	ebay.com
6.		Olympus E-620	3/5	88/100	..	72/100	4.5/5	5/5	Feb 2009	US$ 699	ebay.com
7.		Olympus E-P2	3/5	+	..	69/100	4/5	4.5/5	Nov 2009	US$ 799	ebay.com
8.		Olympus E-P3	..	83/100	..	74/100	4.5/5	4.5/5	Jun 2011	US$ 799	ebay.com
9.		Olympus E-PL1	..	86/100	..	69/100	4/5	4.5/5	Feb 2010	US$ 599	ebay.com
10.		Olympus E-PL2	3/5	83/100	..	71/100	4.5/5	4.5/5	Jan 2011	US$ 599	ebay.com
11.		Olympus E-PL3	3/5	+ +	..	72/100	4.5/5	4/5	Jun 2011	US$ 599	ebay.com
12.		Panasonic G10	3/5	..	..	70/100	4/5	4/5	Mar 2010	US$ 499	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.		Pentax WG-8	..	..	..	..	..	..	Jun 2024	US$ 399	amazon.com
16.		Pentax WG-90	..	..	..	..	..	..	Nov 2023	US$ 279	amazon.com
17.		Ricoh WG-60	..	..	..	..	..	..	Oct 2018	US$ 279	ebay.com
Note: (+ +) 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. 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. 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

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