Nikon D3100 vs Ricoh GR III

The Nikon D3100 and the Ricoh GR III are two digital cameras that were officially introduced, respectively, in August 2010 and February 2019. The D3100 is a DSLR, while the GR III is a fixed lens compact. Both cameras are equipped with an APS-C sensor. The Nikon has a resolution of 14.2 megapixels, whereas the Ricoh provides 24 MP.

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

Headline Specifications

Nikon D3100		Ricoh GR III
Digital single lens reflex		Fixed lens compact camera
Nikon F mount lenses		28mm f/2.8
14.2 MP – APS-C sensor		24 MP – APS-C sensor
1080/24p Video		1080/60p Video
ISO 100-3,200 (100 - 12,800)		ISO 100-102,400
Optical viewfinder		Viewfinder optional
3.0" LCD – 230k dots		3.0" LCD – 1037k dots
Fixed screen (not touch-sensitive)		Fixed touchscreen
3 shutter flaps per second		4 shutter flaps per second
Lens stabilization only		In-body stabilization
550 shots per battery charge		200 shots per battery charge
124 x 96 x 75 mm, 505 g		109 x 62 x 33 mm, 257 g

Check D3100 offers at
ebay.com
Check GR III price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3100 and the Ricoh GR III? 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 Nikon D3100 and the Ricoh GR III. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The D3100 can be obtained in two different colors (black, red), while the GR III 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 Ricoh GR III is considerably smaller (43 percent) than the Nikon D3100. In this context, it is worth noting that neither the D3100 nor the GR III are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the GR III has a lens built in, whereas the D3100 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 D3100 and their specifications in the Nikon Lens Catalog.

Concerning battery life, the D3100 gets 550 shots out of its Nikon EN-EL14 battery, while the GR III can take 200 images on a single charge of its Ricoh DB-110 power pack. The power pack in the GR III can be charged via the USB port, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Nikon D3100	124 mm	96 mm	75 mm	505 g	550	n	Aug 2010	EUR 549	ebay.com
2.		Ricoh GR III	109 mm	62 mm	33 mm	257 g	200	n	Feb 2019	EUR 899	amazon.com
3.		Canon G7 X Mark III	105 mm	61 mm	41 mm	304 g	235	n	Jul 2019	EUR 779	amazon.com
4.		Nikon D40	124 mm	94 mm	64 mm	522 g	470	n	Nov 2006	EUR 499	ebay.com
5.		Nikon D40X	124 mm	94 mm	64 mm	522 g	520	n	Mar 2007	EUR 699	ebay.com
6.		Nikon D60	126 mm	94 mm	64 mm	522 g	500	n	Jan 2008	EUR 499	ebay.com
7.		Nikon D3000	126 mm	97 mm	64 mm	536 g	500	n	Jul 2009	EUR 539	ebay.com
8.		Nikon D3200	125 mm	96 mm	77 mm	505 g	540	n	Apr 2012	EUR 599	ebay.com
9.		Nikon D3300	124 mm	98 mm	76 mm	430 g	700	n	Jan 2014	EUR 499	ebay.com
10.		Nikon D3400	124 mm	98 mm	76 mm	445 g	1200	n	Aug 2016	EUR 499	ebay.com
11.		Nikon D5000	127 mm	104 mm	80 mm	590 g	510	n	Apr 2009	EUR 699	ebay.com
12.		Nikon D5100	128 mm	97 mm	79 mm	560 g	660	n	Apr 2011	EUR 699	ebay.com
13.		Nikon D5600	124 mm	97 mm	70 mm	465 g	970	n	Nov 2016	EUR 819	ebay.com
14.		Panasonic TZ200	111 mm	65 mm	45 mm	340 g	370	n	Feb 2018	EUR 799	amazon.com
15.		Ricoh GR II	117 mm	63 mm	35 mm	251 g	320	n	Jun 2015	EUR 799	ebay.com
16.		Ricoh GR IIIx	109 mm	62 mm	35 mm	262 g	200	n	Sep 2021	EUR 999	amazon.com
17.		Sony ZV-1	105 mm	60 mm	44 mm	294 g	260	n	May 2020	EUR 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 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. 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the GR III is 3 percent bigger. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

With 24MP, the GR III offers a higher resolution than the D3100 (14.2MP), but the GR III has smaller individual pixels (pixel pitch of 3.91μm versus 5.01μm for the D3100). Yet, the GR III is a much more recent model (by 8 years and 6 months) than the D3100, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the GR III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Ricoh GR III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GR III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Nikon D3100 are 23 x 15.4 inches or 58.5 x 39 cm for good quality, 18.4 x 12.3 inches or 46.8 x 31.2 cm for very good quality, and 15.4 x 10.2 inches or 39 x 26 cm for excellent quality prints.

The GR III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Nikon D3100 has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 100-12800. The corresponding ISO settings for the Ricoh GR III are ISO 100 to ISO 102400 (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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 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.		Nikon D3100	APS-C	14.2	4608	3072	1080/24p	22.5	11.3	919	67
2.		Ricoh GR III	APS-C	24.0	6000	4000	1080/60p	24.1	13.5	1897	83
3.		Canon G7 X Mark III	1-inch	20.0	5472	3648	4K/30p	22.2	12.4	583	65
4.		Nikon D40	APS-C	6.0	3008	2000	none	21.0	11.0	561	56
5.		Nikon D40X	APS-C	10.0	3872	2592	none	22.4	11.4	516	63
6.		Nikon D60	APS-C	10.0	3872	2592	none	22.5	11.4	562	65
7.		Nikon D3000	APS-C	10.0	3872	2592	none	22.3	11.1	563	62
8.		Nikon D3200	APS-C	24.1	6016	4000	1080/30p	24.1	13.2	1131	81
9.		Nikon D3300	APS-C	24.0	6000	4000	1080/60p	24.3	12.8	1385	82
10.		Nikon D3400	APS-C	24.0	6000	4000	1080/60p	24.8	13.9	1192	86
11.		Nikon D5000	APS-C	12.2	4288	2848	720/24p	22.7	12.5	868	72
12.		Nikon D5100	APS-C	16.1	4928	3264	1080/30p	23.5	13.6	1183	80
13.		Nikon D5600	APS-C	24.0	6000	4000	1080/60p	24.1	14.0	1306	84
14.		Panasonic TZ200	1-inch	20.0	5472	3648	4K/30p	22.0	12.2	449	64
15.		Ricoh GR II	APS-C	16.1	4928	3264	1080/30p	23.6	13.7	1078	80
16.		Ricoh GR IIIx	APS-C	24.0	6000	4000	1080/60p	24.2	13.8	2146	85
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 are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GR III provides a faster frame rate than the D3100. It can shoot movie footage at 1080/60p, while the Nikon is limited to 1080/24p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the D3100 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the GR III relies on live view and the rear LCD for framing. That said, the GR III can be equipped with an optional viewfinder – the GV-1. The adjacent table lists some of the other core features of the Nikon D3100 and Ricoh GR III 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.		Nikon D3100	optical	n	3.0 / 230	fixed	n	1/4000s	3.0/s	Y	n
2.		Ricoh GR III	optional	n	3.0 / 1037	fixed	Y	1/4000s	4.0/s	n	Y
3.		Canon G7 X Mark III	none	n	3.0 / 1040	tilting	Y	1/2000s	30/s	Y	Y
4.		Nikon D40	optical	n	2.5 / 230	fixed	n	1/4000s	2.5/s	Y	n
5.		Nikon D40X	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
6.		Nikon D60	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
7.		Nikon D3000	optical	n	3.0 / 230	fixed	n	1/4000s	3.0/s	Y	n
8.		Nikon D3200	optical	n	3.0 / 921	fixed	n	1/4000s	4.0/s	Y	n
9.		Nikon D3300	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
10.		Nikon D3400	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
11.		Nikon D5000	optical	n	2.7 / 230	full-flex	n	1/4000s	4.0/s	Y	n
12.		Nikon D5100	optical	n	3.0 / 921	swivel	n	1/4000s	4.0/s	Y	n
13.		Nikon D5600	optical	n	3.2 / 1037	swivel	Y	1/4000s	5.0/s	Y	n
14.		Panasonic TZ200	2330	n	3.0 / 1240	fixed	Y	1/2000s	10.0/s	Y	Y
15.		Ricoh GR II	optional	n	3.0 / 1230	fixed	n	1/4000s	4.0/s	Y	n
16.		Ricoh GR IIIx	optional	n	3.0 / 1037	fixed	Y	1/4000s	4.0/s	n	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 D3100 has one, while the GR III does not. While the built-in flash of the D3100 is not very powerful, it can at times be useful as a fill-in light.

The Ricoh GR III 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.

Concerning the storage of imaging data, both the D3100 and the GR III write their files to SDXC cards. The GR III supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D3100 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 Nikon D3100 and Ricoh GR III 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.		Nikon D3100	Y	mono / mono	-	-	mini	2.0	-	-	-
2.		Ricoh GR III	Y	stereo / mono	-	-	-	3.0	Y	-	Y
3.		Canon G7 X Mark III	-	stereo / mono	Y	-	micro	3.1	Y	-	Y
4.		Nikon D40	Y	- / -	-	-	-	2.0	-	-	-
5.		Nikon D40X	Y	- / -	-	-	-	2.0	-	-	-
6.		Nikon D60	Y	- / -	-	-	-	2.0	-	-	-
7.		Nikon D3000	Y	- / -	-	-	-	2.0	-	-	-
8.		Nikon D3200	Y	mono / mono	Y	-	mini	2.0	-	-	-
9.		Nikon D3300	Y	mono / mono	Y	-	mini	2.0	-	-	-
10.		Nikon D3400	Y	mono / mono	-	-	mini	2.0	-	-	Y
11.		Nikon D5000	Y	mono / mono	-	-	mini	2.0	-	-	-
12.		Nikon D5100	Y	mono / mono	Y	-	mini	2.0	-	-	-
13.		Nikon D5600	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
14.		Panasonic TZ200	-	stereo / mono	-	-	micro	2.0	Y	-	Y
15.		Ricoh GR II	Y	stereo / mono	-	-	micro	2.0	Y	Y	-
16.		Ricoh GR IIIx	Y	stereo / mono	-	-	-	3.0	Y	-	Y
17.		Sony ZV-1	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y

It is notable that the GR III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D3100 does not provide wifi capability.

The GR III is a recent model that features in the current product line-up of Ricoh. In contrast, the D3100 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the D3100 was succeeded by the Nikon D3200. Further information on the features and operation of the D3100 and GR III can be found, respectively, in the Nikon D3100 Manual (free pdf) or the online Ricoh GR III Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Nikon D3100 and the Ricoh GR III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Nikon D3100:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Easier framing: Has an optical viewfinder for image composition and settings control.
• More flexible: Can take a variety of interchangeable lenses, including specialty optics.
• Longer lasting: Can take more shots (550 versus 200) on a single battery charge.
• Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
• More heavily discounted: Has been available for much longer (launched in August 2010).

Arguments in favor of the Ricoh GR III:

• More detail: Has more megapixels (24 vs 14.2MP), which boosts linear resolution by 30%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better video: Provides higher movie framerates (1080/60p versus 1080/24p).
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• More detailed LCD: Has a higher resolution rear screen (1037k vs 230k dots).
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (4 vs 3 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Ready to shoot: Comes with an integrated lens, while the D3100 requires a separate lens.
• More compact: Is smaller (109x62mm vs 124x96mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the D3100).
• Easier travel charging: Can be conveniently charged via its USB port.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
• 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.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Reflects 8 years and 6 months of technical progress since the D3100 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the GR III is the clear winner of the contest (18 : 6 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.

How about other alternatives? Do the specifications of the Nikon D3100 and the Ricoh GR III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Prime Lens Compact 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 D3100 or the GR III 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 where reviews by experts come in. 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.		Nikon D3100	5/5	+ +	..	72/100	4.5/5	4.5/5	Aug 2010	EUR 549	ebay.com
2.		Ricoh GR III	4/5	..	3.5/5	81/100	4/5	..	Feb 2019	EUR 899	amazon.com
3.		Canon G7 X Mark III	..	+ +	4/5	81/100	4/5	..	Jul 2019	EUR 779	amazon.com
4.		Nikon D40	..	81/100	..	+ +	o	4.5/5	Nov 2006	EUR 499	ebay.com
5.		Nikon D40X	..	79/100	..	+ +	4/5	4/5	Mar 2007	EUR 699	ebay.com
6.		Nikon D60	..	80/100	..	+ +	4/5	4.5/5	Jan 2008	EUR 499	ebay.com
7.		Nikon D3000	..	+	..	72/100	4/5	4.5/5	Jul 2009	EUR 539	ebay.com
8.		Nikon D3200	5/5	+ +	..	73/100	4.5/5	4.5/5	Apr 2012	EUR 599	ebay.com
9.		Nikon D3300	3/5	+	..	77/100	4.5/5	4.5/5	Jan 2014	EUR 499	ebay.com
10.		Nikon D3400	4/5	+	4/5	76/100	4/5	4.5/5	Aug 2016	EUR 499	ebay.com
11.		Nikon D5000	..	+ +	..	75/100	4/5	4.5/5	Apr 2009	EUR 699	ebay.com
12.		Nikon D5100	5/5	+ +	..	76/100	4.5/5	4.5/5	Apr 2011	EUR 699	ebay.com
13.		Nikon D5600	4/5	..	4/5	79/100	4.5/5	4/5	Nov 2016	EUR 819	ebay.com
14.		Panasonic TZ200	..	+ +	4.5/5	81/100	4.5/5	4.5/5	Feb 2018	EUR 799	amazon.com
15.		Ricoh GR II	..	..	..	..	4.5/5	4.5/5	Jun 2015	EUR 799	ebay.com
16.		Ricoh GR IIIx	..	..	4.5/5	..	..	..	Sep 2021	EUR 999	amazon.com
17.		Sony ZV-1	4/5	+	4/5	85/100	4/5	4.5/5	May 2020	EUR 799	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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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Check GR III price at
amazon.com

Other camera comparisons

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