OM System TG-7 vs Sony RX100

The OM System Tough TG-7 and the Sony Cyber-shot DSC-RX100 are two digital cameras that were announced, respectively, in September 2023 and June 2012. Both the TG-7 and the RX100 are fixed lens compact cameras that are based on a 1/2.3-inch (TG-7) and an one-inch (RX100) sensor. The OM System has a resolution of 12 megapixels, whereas the Sony provides 20 MP.

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

Headline Specifications

OM System TG-7		Sony RX100
Fixed lens compact camera		Fixed lens compact camera
25-100mm f/2.0-4.9		28-100mm f/1.8-4.9
12 MP – 1/2.3" sensor		20 MP – 1" sensor
4K/30p Video		1080/60p Video
ISO 100-12,800		ISO 100-6,400 (100 - 25,600)
No viewfinder, LCD framing		No viewfinder, LCD framing
3.0" LCD – 1040k dots		3.0" LCD – 1229k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
20 shutter flaps per second		10 shutter flaps per second
In-body stabilization		Lens-based stabilization
Waterproof body (15m)		not weather sealed
330 shots per battery charge		330 shots per battery charge
114 x 66 x 33 mm, 249 g		102 x 58 x 36 mm, 240 g

Check TG-7 price at
amazon.com
Check RX100 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the OM System Tough TG-7 and the Sony Cyber-shot DSC-RX100? 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 OM System TG-7 and the Sony RX100. 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 TG-7 can be obtained in two different colors (black, red), while the RX100 is only available in black.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX100 is notably smaller (21 percent) than the OM System TG-7. Moreover, the RX100 is slightly lighter (4 percent) than the TG-7. It is worth mentioning in this context that the TG-7 is splash and dust resistant, while the RX100 does not feature any corresponding weather-sealing. More than that, the TG-7 is water-proof up to 15m and can, thus, be used for underwater photography.

The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

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.		OM System TG-7	114 mm	66 mm	33 mm	249 g	330	Y	Sep 2023	US$ 549	amazon.com
2.		Sony RX100	102 mm	58 mm	36 mm	240 g	330	n	Jun 2012	US$ 649	ebay.com
3.		Canon G9 X	98 mm	58 mm	31 mm	209 g	220	n	Oct 2015	US$ 529	ebay.com
4.		Canon G9 X Mark II	98 mm	58 mm	31 mm	206 g	235	n	Jan 2017	US$ 529	ebay.com
5.		Fujifilm XP130	110 mm	71 mm	28 mm	207 g	240	Y	Jan 2018	US$ 229	ebay.com
6.		Fujifilm XP140	110 mm	71 mm	28 mm	207 g	240	Y	Feb 2019	US$ 229	ebay.com
7.		Olympus E-PM1	110 mm	64 mm	34 mm	265 g	330	n	Jun 2011	US$ 499	ebay.com
8.		Olympus TG-4	112 mm	66 mm	31 mm	247 g	380	Y	Apr 2015	US$ 379	ebay.com
9.		Olympus TG-5	113 mm	66 mm	32 mm	250 g	340	Y	May 2017	US$ 449	ebay.com
10.		Olympus TG-6	113 mm	66 mm	32 mm	253 g	340	Y	May 2019	US$ 449	ebay.com
11.		Olympus XZ-1	111 mm	65 mm	42 mm	275 g	320	n	Jan 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 FZ300	132 mm	92 mm	117 mm	691 g	380	Y	Jul 2015	US$ 599	amazon.com
14.		Pentax WG-8	118 mm	66 mm	33 mm	242 g	340	Y	Jun 2024	US$ 399	amazon.com
15.		Sony RX10	129 mm	88 mm	102 mm	813 g	420	Y	Oct 2013	US$ 1 299	ebay.com
16.		Sony RX100 II	102 mm	58 mm	38 mm	281 g	350	n	Jun 2013	US$ 749	ebay.com
17.		Sony RX100 III	102 mm	58 mm	41 mm	290 g	320	n	May 2014	US$ 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

The price is, of course, an important factor in any camera decision. 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 TG-7 was launched at a somewhat lower price (by 15 percent) than the RX100, which makes it more attractive for photographers on a tight budget. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels 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 OM System TG-7 features a 1/2.3-inch sensor and the Sony RX100 an one-inch sensor. The sensor area in the RX100 is 314 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 2.7. The sensor in the TG-7 has a native 4:3 aspect ratio, while the one in the RX100 offers a 3:2 aspect.

With 20MP, the RX100 offers a higher resolution than the TG-7 (12MP), but the RX100 nevertheless has larger individual pixels (pixel pitch of 2.41μm versus 1.53μm for the TG-7) due to its larger sensor. However, the TG-7 is a much more recent model (by 11 years and 3 months) than the RX100, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony RX100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the RX100 for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the OM System TG-7 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 cm for excellent quality prints.

The OM System Tough TG-7 has a native sensitivity range from ISO 100 to ISO 12800. The corresponding ISO settings for the Sony Cyber-shot DSC-RX100 are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-25600.

In terms of underlying technology, the TG-7 is build around a BSI-CMOS sensor, while the RX100 uses a CMOS 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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 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.		OM System TG-7	1/2.3	12.0	4000	3000	4K/30p	20.9	12.7	1553	54
2.		Sony RX100	1-inch	20.0	5472	3648	1080/60p	22.6	12.4	390	66
3.		Canon G9 X	1-inch	20.0	5472	3648	1080/60p	21.5	12.3	495	63
4.		Canon G9 X Mark II	1-inch	20.0	5472	3648	1080/60p	21.9	12.5	522	65
5.		Fujifilm XP130	1/2.3	15.9	4608	3456	1080/60p	20.6	12.1	1000	51
6.		Fujifilm XP140	1/2.3	15.9	4608	3456	4K/15p	20.7	12.2	1102	52
7.		Olympus E-PM1	Four Thirds	12.2	4032	3024	1080/60i	21.0	10.3	499	52
8.		Olympus TG-4	1/2.3	15.9	4608	3456	1080/30p	20.2	11.6	737	47
9.		Olympus TG-5	1/2.3	12.0	4000	3000	4K/30p	20.5	11.9	934	50
10.		Olympus TG-6	1/2.3	12.0	4000	3000	4K/30p	20.7	12.2	1127	52
11.		Olympus XZ-1	1/1.7	10.1	3664	2752	720/30p	18.8	10.4	117	34
12.		Olympus XZ-2	1/1.7	11.8	3968	2976	1080/30p	20.4	11.3	216	49
13.		Panasonic FZ300	1/2.3	12.0	4000	3000	4K/30p	19.3	11.0	97	38
14.		Pentax WG-8	1/2.3	20.2	5184	3888	4K/30p	20.9	12.8	1626	54
15.		Sony RX10	1-inch	20.0	5472	3648	1080/60p	22.9	12.6	474	69
16.		Sony RX100 II	1-inch	20.0	5472	3648	1080/60p	22.5	12.4	483	67
17.		Sony RX100 III	1-inch	20.0	5472	3648	1080/60p	22.4	12.3	495	67
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 two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the TG-7 provides a higher video resolution than the RX100. It can shoot video footage at 4K/30p, while the Sony is limited to 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The TG-7 and the RX100 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 adjacent table lists some of the other core features of the OM System TG-7 and Sony RX100 along with similar information for a selection of comparators.

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.		OM System TG-7	none	n	3.0 / 1040	fixed	n	1/2000s	20.0/s	Y	Y
2.		Sony RX100	none	n	3.0 / 1229	fixed	n	1/2000s	10.0/s	Y	Y
3.		Canon G9 X	none	n	3.0 / 1040	fixed	Y	1/2000s	6.0/s	Y	Y
4.		Canon G9 X Mark II	none	n	3.0 / 1040	fixed	Y	1/2000s	8.2/s	Y	Y
5.		Fujifilm XP130	none	n	3.0 / 920	fixed	n	1/2000s	10.0/s	Y	Y
6.		Fujifilm XP140	none	n	3.0 / 920	fixed	n	1/2000s	10.0/s	Y	Y
7.		Olympus E-PM1	optional	n	3.0 / 460	fixed	n	1/4000s	5.5/s	n	Y
8.		Olympus TG-4	none	n	3.0 / 460	fixed	n	1/2000s	5.0/s	Y	Y
9.		Olympus TG-5	none	n	3.0 / 460	fixed	n	1/2000s	20.0/s	Y	Y
10.		Olympus TG-6	none	n	3.0 / 1040	fixed	n	1/2000s	20.0/s	Y	Y
11.		Olympus XZ-1	optional	n	3.0 / 614	fixed	n	1/2000s	2.0/s	Y	Y
12.		Olympus XZ-2	optional	n	3.0 / 920	tilting	Y	1/2000s	5.0/s	Y	Y
13.		Panasonic FZ300	1440	n	3.0 / 1040	swivel	Y	1/4000s	12.0/s	Y	Y
14.		Pentax WG-8	none	n	3.0 / 1040	fixed	n	1/4000s	8.0/s	Y	n
15.		Sony RX10	1440	Y	3.0 / 1229	tilting	n	1/3200s	10.0/s	Y	Y
16.		Sony RX100 II	optional	n	3.0 / 1229	tilting	n	1/2000s	10.0/s	Y	Y
17.		Sony RX100 III	1440	n	3.0 / 1229	tilting	n	1/2000s	10.0/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The OM System TG-7 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.

Both the TG-7 and the RX100 have zoom lenses built in. The TG-7 has a 25-100mm f/2.0-4.9 optic and the RX100 offers a 28-100mm f/1.8-4.9 (focal lengths in full frame equivalent terms). Hence, the OM System provides a wider angle of view at the short end than the Sony and the same tele-photo reach at the long end. The RX100 offers the faster maximum aperture.

The TG-7 writes its imaging data to SDXC cards, while the RX100 uses SDXC or Memory Stick PRO Duo cards. The TG-7 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the RX100 cannot take advantage of Ultra High Speed SD 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 OM System Tough TG-7 and Sony Cyber-shot DSC-RX100 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.		OM System TG-7	-	stereo / mono	-	-	micro	2.0	Y	-	-
2.		Sony RX100	-	stereo / mono	-	-	micro	2.0	-	-	-
3.		Canon G9 X	-	stereo / mono	-	-	micro	2.0	Y	Y	-
4.		Canon G9 X Mark II	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
5.		Fujifilm XP130	-	mono / mono	-	-	micro	2.0	Y	-	Y
6.		Fujifilm XP140	-	mono / mono	-	-	micro	2.0	Y	-	Y
7.		Olympus E-PM1	Y	stereo / mono	-	-	mini	2.0	-	-	-
8.		Olympus TG-4	-	stereo / mono	-	-	micro	2.0	Y	-	-
9.		Olympus TG-5	-	stereo / mono	-	-	micro	2.0	Y	-	-
10.		Olympus TG-6	-	stereo / mono	-	-	micro	2.0	Y	-	-
11.		Olympus XZ-1	Y	mono / -	-	-	mini	2.0	-	-	-
12.		Olympus XZ-2	Y	stereo / mono	-	-	mini	2.0	-	-	-
13.		Panasonic FZ300	Y	stereo / mono	Y	-	mini	2.0	Y	-	-
14.		Pentax WG-8	-	mono / mono	-	-	-	3.0	-	-	-
15.		Sony RX10	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
16.		Sony RX100 II	Y	stereo / mono	-	-	micro	2.0	Y	Y	-
17.		Sony RX100 III	-	stereo / mono	-	-	micro	2.0	Y	Y	-

It is notable that the TG-7 offers wifi support, while the RX100 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Travel and landscape photographers will find it useful that the TG-7 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The TG-7 is a recent model that features in the current product line-up of OM System. In contrast, the RX100 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the RX100 was succeeded by the Sony RX100 II. Further information on the features and operation of the TG-7 and RX100 can be found, respectively, in the OM System TG-7 Manual (free pdf) or the online Sony RX100 Manual.

Review summary

So how do things add up? Which of the two cameras – the OM System TG-7 or the Sony RX100 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

Arguments in favor of the OM System Tough TG-7:

• Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
• Faster burst: Shoots at higher frequency (20 vs 10 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Wider view: Has a wider-angle lens that facilitates landscape or interior shots.
• 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 15m).
• Easier geotagging: Features an internal GPS sensor to log localization data.
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More affordable: Was introduced into a lower priced segment (15 percent cheaper at launch).
• More modern: Reflects 11 years and 3 months of technical progress since the RX100 launch.

Advantages of the Sony Cyber-shot DSC-RX100:

• More detail: Has more megapixels (20 vs 12MP), which boosts linear resolution by 32%.
• 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.
• More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
• Better light gathering: Has a lens with a wider maximum aperture (f/1.8 vs f/2.0).
• More compact: Is smaller (102x58mm vs 114x66mm) and will fit more readily into a bag.
• More heavily discounted: Has been around for much longer (launched in June 2012).

If the count of individual advantages (bullet points above) is taken as a guide, the TG-7 emerges as the winner of the contest (11 : 9 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 OM System TG-7 and the Sony RX100 place the cameras among the top in their class? Find out in the latest Best Travel-Zoom 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 says little about, for example, the shooting experience and imaging performance of the TG-7 and the RX100 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		OM System TG-7	4/5	..	4.5/5	..	4/5	4/5	Sep 2023	US$ 549	amazon.com
2.		Sony RX100	5/5	+ +	..	78/100	4/5	5/5	Jun 2012	US$ 649	ebay.com
3.		Canon G9 X	3.5/5	+ +	..	..	4.5/5	4.5/5	Oct 2015	US$ 529	ebay.com
4.		Canon G9 X Mark II	4/5	..	4/5	75/100	4.5/5	4.5/5	Jan 2017	US$ 529	ebay.com
5.		Fujifilm XP130	..	o	..	..	3.5/5	4/5	Jan 2018	US$ 229	ebay.com
6.		Fujifilm XP140	..	+	..	..	3.5/5	4/5	Feb 2019	US$ 229	ebay.com
7.		Olympus E-PM1	..	86/100	..	71/100	4.5/5	4.5/5	Jun 2011	US$ 499	ebay.com
8.		Olympus TG-4	..	+	..	79/100	4/5	4/5	Apr 2015	US$ 379	ebay.com
9.		Olympus TG-5	..	+ +	4.5/5	..	4/5	4/5	May 2017	US$ 449	ebay.com
10.		Olympus TG-6	4/5	+ +	4.5/5	76/100	4/5	4/5	May 2019	US$ 449	ebay.com
11.		Olympus XZ-1	4/5	..	..	74/100	4.5/5	4.5/5	Jan 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 FZ300	..	+ +	..	..	4.5/5	4.5/5	Jul 2015	US$ 599	amazon.com
14.		Pentax WG-8	..	..	..	..	..	..	Jun 2024	US$ 399	amazon.com
15.		Sony RX10	5/5	+	..	80/100	4.5/5	4.5/5	Oct 2013	US$ 1 299	ebay.com
16.		Sony RX100 II	5/5	+ +	..	79/100	4.5/5	4.5/5	Jun 2013	US$ 749	ebay.com
17.		Sony RX100 III	5/5	+ +	..	82/100	4.5/5	5/5	May 2014	US$ 799	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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