Sony RX0 II vs Olympus E-400

The Sony Cyber-shot DSC-RX0II and the Olympus E-400 are two digital cameras that were officially introduced, respectively, in March 2019 and September 2006. The RX0 II is a fixed lens compact, while the E-400 is a DSLR. The cameras are based on an one-inch (RX0 II) and a Four Thirds (E-400) sensor. The Sony has a resolution of 15.4 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.

Headline Specifications

Sony RX0 II		Olympus E-400
Fixed lens compact camera		Digital single lens reflex
24mm f/4.0		Four Thirds lenses
15.4 MP – 1" sensor		10 MP – Four Thirds sensor
4K/30p Video		no Video
ISO 80-12,800		ISO 100-1,600
No viewfinder, LCD framing		Optical viewfinder
1.5" LCD – 230k dots		2.5" LCD – 215k dots
Tilting screen (no touchscreen)		Fixed screen (not touch-sensitive)
5.5 shutter flaps per second		3 shutter flaps per second
Waterproof body (10m)		not weather sealed
240 shots per battery charge		500 shots per battery charge
59 x 41 x 35 mm, 132 g		130 x 91 x 53 mm, 435 g

Check RX0 II price at
amazon.com
Check E-400 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Cyber-shot DSC-RX0II and the Olympus E-400? 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 Sony RX0 II and the Olympus E-400 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 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-400 is considerably larger (389 percent) than the Sony RX0 II. It is worth mentioning in this context that the RX0 II is splash and dust resistant, while the E-400 does not feature any corresponding weather-sealing. More than that, the RX0 II is water-proof up to 10m and can, thus, be used for underwater photography.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX0 II has a lens built in, whereas the E-400 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-400 and their specifications in the Four Thirds Lens Catalog.

Concerning battery life, the RX0 II gets 240 shots out of its Sony NP-BJ1 battery, while the E-400 can take 500 images on a single charge of its Olympus BLS-1 power pack. The power pack in the RX0 II can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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 (USD)	Street Price
1.		Sony RX0 II	59 mm	41 mm	35 mm	132 g	240	Y	Mar 2019	699	amazon.com
2.		Olympus E-400	130 mm	91 mm	53 mm	435 g	500	n	Sep 2006	699	ebay.com
3.		Olympus E-410	130 mm	91 mm	53 mm	435 g	500	n	Mar 2007	699	ebay.com
4.		Olympus E-420	130 mm	91 mm	53 mm	440 g	500	n	Mar 2008	599	ebay.com
5.		Olympus E-500	130 mm	95 mm	66 mm	479 g	750	n	Sep 2005	599	ebay.com
6.		Olympus E-510	136 mm	92 mm	68 mm	538 g	750	n	Mar 2007	799	ebay.com
7.		Panasonic L10	135 mm	96 mm	78 mm	556 g	450	n	Aug 2007	599	ebay.com
8.		Sony HX95	102 mm	58 mm	36 mm	242 g	370	n	Aug 2018	429	ebay.com
9.		Sony HX99	102 mm	58 mm	36 mm	242 g	370	n	Aug 2018	449	ebay.com
10.		Sony RX0	59 mm	41 mm	30 mm	110 g	240	Y	Aug 2017	699	ebay.com
11.		Sony RX10 II	129 mm	88 mm	102 mm	813 g	400	Y	Jun 2015	1,299	ebay.com
12.		Sony RX10 III	133 mm	94 mm	127 mm	1051 g	420	Y	Mar 2016	1,499	ebay.com
13.		Sony RX10 IV	133 mm	94 mm	145 mm	1095 g	400	Y	Sep 2017	1,699	amazon.com
14.		Sony RX100 III	102 mm	58 mm	41 mm	290 g	320	n	May 2014	799	ebay.com
15.		Sony RX100 VI	102 mm	58 mm	43 mm	301 g	240	n	Jun 2018	1,199	ebay.com
16.		Sony WX800	102 mm	58 mm	36 mm	233 g	370	n	Oct 2018	399	ebay.com
17.		Sony ZV-1	105 mm	60 mm	44 mm	294 g	260	n	May 2020	799	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 obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony RX0 II features an one-inch sensor and the Olympus E-400 a Four Thirds sensor. The sensor area in the E-400 is 94 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 2.0. The sensor in the RX0 II has a native 3:2 aspect ratio, while the one in the E-400 offers a 4:3 aspect.

Despite having a smaller sensor, the Sony RX0 II offers a higher resolution of 15.4 megapixels, compared with 10 MP of the Olympus E-400. 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 2.74μm versus 4.74μm for the E-400). However, it should be noted that the RX0 II is much more recent (by 12 years and 6 months) than the E-400, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The resolution advantage of the Sony RX0 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the RX0 II for good quality output (200 dots per inch) amounts to 24 x 16 inches or 61 x 40.6 cm, for very good quality (250 dpi) 19.2 x 12.8 inches or 48.8 x 32.5 cm, and for excellent quality (300 dpi) 16 x 10.7 inches or 40.6 x 27.1 cm. The corresponding values for the Olympus E-400 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 Sony Cyber-shot DSC-RX0II has a native sensitivity range from ISO 80 to ISO 12800. The corresponding ISO settings for the Olympus E-400 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.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Sony RX0 II	1-inch	15.4	4800	3200	4K/30p	22.1	12.4	555	65
2.		Olympus E-400	Four Thirds	10.0	3648	2736	none	21.0	10.6	127	53
3.		Olympus E-410	Four Thirds	10.0	3648	2736	none	21.1	10.0	494	51
4.		Olympus E-420	Four Thirds	10.0	3648	2736	none	21.5	10.4	527	56
5.		Olympus E-500	Four Thirds	8.0	3264	2448	none	20.7	10.3	45	51
6.		Olympus E-510	Four Thirds	10.0	3648	2736	none	21.2	10.0	442	52
7.		Panasonic L10	Four Thirds	10.0	3648	2736	none	21.3	10.8	429	55
8.		Sony HX95	1/2.3	18.0	4896	3672	4K/30p	20.6	12.1	1057	51
9.		Sony HX99	1/2.3	18.0	4896	3672	4K/30p	20.6	12.1	1058	51
10.		Sony RX0	1-inch	15.4	4800	3200	1080/60p	22.4	12.4	548	68
11.		Sony RX10 II	1-inch	20.0	5472	3648	4K/30p	23.0	12.6	531	70
12.		Sony RX10 III	1-inch	20.0	5472	3648	4K/30p	23.1	12.6	472	70
13.		Sony RX10 IV	1-inch	20.0	5472	3648	4K/30p	22.0	12.2	408	63
14.		Sony RX100 III	1-inch	20.0	5472	3648	1080/60p	22.4	12.3	495	67
15.		Sony RX100 VI	1-inch	20.0	5472	3648	4K/30p	22.1	12.3	478	64
16.		Sony WX800	1/2.3	18.0	4896	3672	4K/30p	20.6	12.2	1070	51
17.		Sony ZV-1	1-inch	20.0	5472	3648	4K/30p	22.2	12.6	669	66
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. The RX0 II indeed provides movie recording capabilities, while the E-400 does not. The highest resolution format that the RX0 II can use is 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-400 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the RX0 II relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Sony RX0 II, the Olympus E-400, 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.		Sony RX0 II	none	n	1.5 / 230	tilting	n	..	5.5/s	n	n
2.		Olympus E-400	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
3.		Olympus E-410	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
4.		Olympus E-420	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	n
5.		Olympus E-500	optical	n	2.5 / 215	fixed	n	1/4000s	2.5/s	Y	n
6.		Olympus E-510	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	Y
7.		Panasonic L10	optical	n	2.5 / 207	swivel	n	1/4000s	3.0/s	Y	n
8.		Sony HX95	638	n	3.0 / 922	tilting	n	1/2000s	10.0/s	Y	Y
9.		Sony HX99	638	n	3.0 / 922	tilting	Y	1/2000s	10.0/s	Y	Y
10.		Sony RX0	none	n	1.5 / 230	fixed	n	..	5.5/s	n	n
11.		Sony RX10 II	2359	Y	3.0 / 1229	tilting	n	1/3200s	14.0/s	Y	Y
12.		Sony RX10 III	2359	Y	3.0 / 1229	tilting	n	1/2000s	14.0/s	Y	Y
13.		Sony RX10 IV	2359	Y	3.0 / 1440	tilting	Y	1/2000s	24.0/s	Y	Y
14.		Sony RX100 III	1440	n	3.0 / 1229	tilting	n	1/2000s	10.0/s	Y	Y
15.		Sony RX100 VI	2359	n	3.0 / 1229	tilting	Y	1/2000s	24.0/s	Y	Y
16.		Sony WX800	none	n	3.0 / 922	tilting	Y	1/2000s	10.0/s	Y	Y
17.		Sony ZV-1	none	n	3.0 / 922	swivel	Y	1/2000s	24.0/s	n	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 E-400 has one, while the RX0 II does not. While the built-in flash of the E-400 is not very powerful, it can at times be useful as a fill-in light.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the RX0 II only has electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The RX0 II writes its imaging data to micro SDXC or Memory Stick Micro cards, while the E-400 uses Compact Flash or xD Picture cards. The E-400 features dual card slots, which can be very useful in case a memory card fails. In contrast, the RX0 II only has one slot.

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 Sony Cyber-shot DSC-RX0II and Olympus E-400 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.		Sony RX0 II	-	stereo / mono	Y	-	micro	2.0	Y	-	Y
2.		Olympus E-400	Y	- / -	-	-	-	2.0	-	-	-
3.		Olympus E-410	Y	- / -	-	-	-	2.0	-	-	-
4.		Olympus E-420	Y	- / -	-	-	-	2.0	-	-	-
5.		Olympus E-500	Y	- / -	-	-	-	2.0	-	-	-
6.		Olympus E-510	Y	- / -	-	-	-	2.0	-	-	-
7.		Panasonic L10	Y	- / -	-	-	-	2.0	-	-	-
8.		Sony HX95	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
9.		Sony HX99	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
10.		Sony RX0	-	stereo / mono	Y	-	micro	2.0	Y	-	Y
11.		Sony RX10 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
12.		Sony RX10 III	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
13.		Sony RX10 IV	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
14.		Sony RX100 III	-	stereo / mono	-	-	micro	2.0	Y	Y	-
15.		Sony RX100 VI	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
16.		Sony WX800	-	stereo / mono	-	-	micro	2.0	Y	Y	-
17.		Sony ZV-1	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y

It is notable that the RX0 II offers wifi support, while the E-400 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

The RX0 II is a recent model that features in the current product line-up of Sony. In contrast, the E-400 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-400 was succeeded by the Olympus E-410. Further information on the features and operation of the RX0 II and E-400 can be found, respectively, in the Sony RX0 II Manual (free pdf) or the online Olympus E-400 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Sony RX0 II and the Olympus E-400? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Reasons to prefer the Sony Cyber-shot DSC-RX0II:

• More detail: Offers more megapixels (15.4 vs 10MP) with a 27% higher linear resolution.
• Broader imaging potential: Can record not only still images but also 4K/30p movies.
• More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Faster burst: Shoots at higher frequency (5.5 vs 3 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Ready to shoot: Comes with a built-in lens, while the E-400 requires a separate lens.
• More compact: Is smaller (59x41mm vs 130x91mm) and thus needs less room in the bag.
• Less heavy: Is lighter even though it comes with a built-in lens (unlike the E-400).
• Easier travel charging: Can be conveniently charged via its USB port.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• Water-proof: Is rugged and sealed and can thus be used for underwater photography (up to 10m).
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• More modern: Reflects 12 years and 6 months of technical progress since the E-400 launch.

Arguments in favor of the Olympus E-400:

• Easier framing: Has an optical viewfinder for image composition and settings control.
• Larger screen: Has a bigger rear LCD (2.5" vs 1.5") for image review and settings control.
• More flexible: Makes it possible to change lenses and thus to use specialty optics.
• Longer lasting: Gets more shots (500 versus 240) out of a single battery charge.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More heavily discounted: Has been around for much longer (launched in September 2006).

If the count of individual advantages (bullet points above) is taken as a guide, the RX0 II is the clear winner of the match-up (15 : 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 Sony RX0 II and the Olympus E-400 place the cameras among the top in their class? Find out in the latest Best Prime Lens Compact Camera and Best DSLR 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 RX0 II and the E-400 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 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], 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 (USD)	Street Price
1.		Sony RX0 II	..	..	..	..	3.5/5	4/5	Mar 2019	699	amazon.com
2.		Olympus E-400	..	85/100	..	..	4/5	4/5	Sep 2006	699	ebay.com
3.		Olympus E-410	..	86/100	..	+ +	4/5	4.5/5	Mar 2007	699	ebay.com
4.		Olympus E-420	..	85/100	..	+ +	4/5	4.5/5	Mar 2008	599	ebay.com
5.		Olympus E-500	..	76/100	..	+ +	..	..	Sep 2005	599	ebay.com
6.		Olympus E-510	..	89/100	..	+ +	3.5/5	4.5/5	Mar 2007	799	ebay.com
7.		Panasonic L10	..	85/100	..	+	3.5/5	4/5	Aug 2007	599	ebay.com
8.		Sony HX95	..	..	..	..	..	..	Aug 2018	429	ebay.com
9.		Sony HX99	..	..	..	..	4/5	4.5/5	Aug 2018	449	ebay.com
10.		Sony RX0	..	..	..	..	3.5/5	4/5	Aug 2017	699	ebay.com
11.		Sony RX10 II	5/5	+ +	..	82/100	4.5/5	4/5	Jun 2015	1,299	ebay.com
12.		Sony RX10 III	5/5	+	..	84/100	4.5/5	4.5/5	Mar 2016	1,499	ebay.com
13.		Sony RX10 IV	5/5	+	3.5/5	84/100	4.5/5	5/5	Sep 2017	1,699	amazon.com
14.		Sony RX100 III	5/5	+ +	..	82/100	4.5/5	5/5	May 2014	799	ebay.com
15.		Sony RX100 VI	4.5/5	+ +	..	83/100	4/5	4.5/5	Jun 2018	1,199	ebay.com
16.		Sony WX800	..	..	..	..	..	..	Oct 2018	399	ebay.com
17.		Sony ZV-1	4/5	+	4/5	85/100	4/5	4.5/5	May 2020	799	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, 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.

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ebay.com

Other camera comparisons

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