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Pentax K-5 II vs Ricoh GR IIIx

The Pentax K-5 II and the Ricoh GR IIIx are two digital cameras that were announced, respectively, in September 2012 and September 2021. The K-5 II is a DSLR, while the GR IIIx is a fixed lens compact. Both cameras are equipped with an APS-C sensor. The Pentax has a resolution of 16.1 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
Pentax K-5 II
versus
Ricoh GR IIIx
Pentax K-5 II   Ricoh GR IIIx
Digital single lens reflex Fixed lens compact camera
Pentax K mount lenses 40mm f/2.8
16.1 MP – APS-C sensor 24 MP – APS-C sensor
1080/25p Video 1080/60p Video
ISO 100-12,800 (80 - 51,200) ISO 100-102,400
Optical viewfinder Viewfinder optional
3.0" LCD – 921k dots 3.0" LCD – 1037k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
7 shutter flaps per second 4 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodynot weather sealed
740 shots per battery charge200 shots per battery charge
131 x 97 x 73 mm, 760 g 109 x 62 x 35 mm, 262 g
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Check K-5 II offers at
ebay.com
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Check GR IIIx price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-5 II and the Ricoh GR IIIx? 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.

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Body comparison

The physical size and weight of the Pentax K-5 II and the Ricoh GR IIIx are illustrated in the side-by-side display below. 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 size dimensions are rounded to the nearest millimeter.

Size Pentax K-5 II vs Ricoh GR IIIx
Compare K-5 II versus GR IIIx top
Comparison K-5 II or GR IIIx rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Ricoh GR IIIx is considerably smaller (47 percent) than the Pentax K-5 II. It is worth mentioning in this context that the K-5 II is splash and dust resistant, while the GR IIIx does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the GR IIIx has a lens built in, whereas the K-5 II is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

Concerning battery life, the K-5 II gets 740 shots out of its Pentax D-LI90 battery, while the GR IIIx can take 200 images on a single charge of its Ricoh DB-110 power pack. The power pack in the GR IIIx can be charged via the USB port, 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.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-5 II 131 mm 97 mm 73 mm 760 g 740 Y Sep 2012 US$ 1 099ebay.com
2.
 
Ricoh GR IIIx 109 mm 62 mm 35 mm 262 g 200 n Sep 2021 US$ 999 amazon.com
3.
 
Fujifilm X-S10 126 mm 85 mm 65 mm 465 g 325 n Oct 2020 US$ 999 amazon.com
4.
 
Nikon D7100 136 mm 107 mm 76 mm 765 g 950 Y Feb 2013 US$ 1 199ebay.com
5.
 
Olympus E-M5 122 mm 89 mm 43 mm 425 g 360 Y Feb 2012 US$ 1 299ebay.com
6.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 US$ 1 299ebay.com
7.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 US$ 1 099ebay.com
8.
 
Pentax K-5 131 mm 97 mm 73 mm 760 g 740 Y Sep 2010 US$ 1 099ebay.com
9.
 
Pentax K-30 130 mm 97 mm 71 mm 650 g 410 Y May 2012 US$ 849ebay.com
10.
 
Pentax K-50 130 mm 97 mm 71 mm 650 g 410 Y Jun 2013 US$ 599ebay.com
11.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 US$ 649ebay.com
12.
 
Pentax K-500 130 mm 97 mm 71 mm 646 g 710 n Jun 2013 US$ 549ebay.com
13.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 US$ 1 099ebay.com
14.
 
Ricoh GR II 117 mm 63 mm 35 mm 251 g 320 n Jun 2015 US$ 699ebay.com
15.
 
Ricoh GR III 109 mm 62 mm 33 mm 257 g 200 n Feb 2019 US$ 899 amazon.com
16.
 
Sony RX100 V 102 mm 58 mm 41 mm 299 g 220 n Oct 2016 US$ 999ebay.com
17.
 
Sony RX100 VI 102 mm 58 mm 43 mm 301 g 240 n Jun 2018 US$ 1 199ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

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 GR IIIx was launched at a lower price than the K-5 II, 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 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 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. 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.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the GR IIIx is 1 percent smaller. 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.

Pentax K-5 II and Ricoh GR IIIx sensor measures

Despite having a slightly smaller sensor, the GR IIIx offers a higher resolution of 24 megapixels, compared with 16.1 MP of the K-5 II. 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 3.91μm versus 4.81μm for the K-5 II). However, it should be noted that the GR IIIx is much more recent (by 9 years) than the K-5 II, 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 GR IIIx has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Ricoh GR IIIx implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GR IIIx 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 Pentax K-5 II are 24.6 x 16.3 inches or 62.6 x 41.5 cm for good quality, 19.7 x 13.1 inches or 50.1 x 33.2 cm for very good quality, and 16.4 x 10.9 inches or 41.7 x 27.6 cm for excellent quality prints.

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

The Pentax K-5 II has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 80-51200. The corresponding ISO settings for the Ricoh GR IIIx 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.

K-5 II versus GR IIIx MP

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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Pentax K-5 II APS-C 16.1 4928 32641080/25p23.814.1123582
2.
 
Ricoh GR IIIx APS-C 24.0 6000 40001080/60p24.213.8214685
3.
 
Fujifilm X-S10 APS-C 26.0 6240 41604K/30p24.213.7205785
4.
 
Nikon D7100 APS-C 24.0 6000 40001080/60p24.213.7125683
5.
 
Olympus E-M5 Four Thirds 15.9 4608 34561080/60i22.812.382671
6.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
7.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
8.
 
Pentax K-5 APS-C 16.1 4928 32641080/25p23.714.1116282
9.
 
Pentax K-30 APS-C 16.1 4928 32641080/30p23.713.0112979
10.
 
Pentax K-50 APS-C 16.1 4928 32641080/30p23.713.0112079
11.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
12.
 
Pentax K-500 APS-C 16.1 4928 32641080/30p23.713.1108779
13.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
14.
 
Ricoh GR II APS-C 16.1 4928 32641080/30p23.613.7107880
15.
 
Ricoh GR III APS-C 24.0 6000 40001080/60p24.113.5189783
16.
 
Sony RX100 V 1-inch 20.0 5472 36484K/30p22.812.458670
17.
 
Sony RX100 VI 1-inch 20.0 5472 36484K/30p22.112.347864
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 IIIx provides a faster frame rate than the K-5 II. It can shoot movie footage at 1080/60p, while the Pentax is limited to 1080/25p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the K-5 II has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the GR IIIx relies on live view and the rear LCD for framing. That said, the GR IIIx can be equipped with an optional viewfinder – the GV-3. The table below summarizes some of the other core capabilities of the Pentax K-5 II and Ricoh GR IIIx in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty 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.
 
Pentax K-5 IIoptical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
2.
 
Ricoh GR IIIxoptional n3.0 / 1037 fixed Y 1/4000s 4.0/s n Y
3.
 
Fujifilm X-S102360 n3.0 / 1040 swivel Y 1/4000s 8.0/s Y Y
4.
 
Nikon D7100optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
5.
 
Olympus E-M51440 n3.0 / 610 tilting Y 1/4000s 9.0/s n Y
6.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
7.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
8.
 
Pentax K-5optical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
9.
 
Pentax K-30optical n3.0 / 921 fixed n 1/6000s 6.0/s Y Y
10.
 
Pentax K-50optical n3.0 / 921 fixed n 1/6000s 6.0/s Y Y
11.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
12.
 
Pentax K-500optical n3.0 / 921 fixed n 1/6000s 6.0/s Y Y
13.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
14.
 
Ricoh GR IIoptional n3.0 / 1230 fixed n 1/4000s 4.0/s Y n
15.
 
Ricoh GR IIIoptional n3.0 / 1037 fixed Y 1/4000s 4.0/s n Y
16.
 
Sony RX100 V2359 n3.0 / 1229 tilting n 1/2000s 24.0/s Y Y
17.
 
Sony RX100 VI2359 n3.0 / 1229 tilting Y 1/2000s 24.0/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 K-5 II has one, while the GR IIIx does not. While the built-in flash of the K-5 II is not very powerful, it can at times be useful as a fill-in light.

The Pentax K-5 II and the Ricoh GR IIIx both have 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 K-5 II and the GR IIIx write their files to SDXC cards. The GR IIIx supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the K-5 II 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 Pentax K-5 II and Ricoh GR IIIx and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Pentax K-5 IIYstereo / monoY-mini2.0---
2.
 
Ricoh GR IIIxYstereo / mono---3.0Y-Y
3.
 
Fujifilm X-S10Ystereo / monoY-micro3.2Y-Y
4.
 
Nikon D7100Ystereo / monoYYmini2.0---
5.
 
Olympus E-M5Ystereo / mono--mini2.0---
6.
 
Pentax K-3Ymono / monoYYmini3.0---
7.
 
Pentax K-3 IIYmono / monoYYmini3.0---
8.
 
Pentax K-5Ystereo / monoY-mini2.0---
9.
 
Pentax K-30Ymono / mono---2.0---
10.
 
Pentax K-50Ymono / mono--micro2.0---
11.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
12.
 
Pentax K-500Ymono / mono---2.0---
13.
 
Pentax KPYstereo / monoY--2.0Y--
14.
 
Ricoh GR IIYstereo / mono--micro2.0YY-
15.
 
Ricoh GR IIIYstereo / mono---3.0Y-Y
16.
 
Sony RX100 V-stereo / mono--micro2.0YY-
17.
 
Sony RX100 VI-stereo / mono--micro2.0YYY

It is notable that the K-5 II has a microphone port, which is missing on the GR IIIx. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.

Studio photographers will appreciate that the Pentax K-5 II (unlike the GR IIIx) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The GR IIIx is a recent model that features in the current product line-up of Ricoh. In contrast, the K-5 II has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the K-5 II was succeeded by the Pentax K-3. Further information on the features and operation of the K-5 II and GR IIIx can be found, respectively, in the Pentax K-5 II Manual (free pdf) or the online Ricoh GR IIIx Manual.

Review summary

So what is the bottom line? Which of the two cameras – the Pentax K-5 II or the Ricoh GR IIIx – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Pentax K-5 II:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (7 vs 4 flaps/sec) to capture the decisive moment.
  • More flexible: Can take a variety of interchangeable lenses, including specialty optics.
  • Longer lasting: Can take more shots (740 versus 200) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been available for much longer (launched in September 2012).

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Reasons to prefer the Ricoh GR IIIx:

  • More detail: Has more megapixels (24 vs 16.1MP), which boosts linear resolution by 22%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher movie framerates (1080/60p versus 1080/25p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 921k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Ready to shoot: Comes with an integrated lens, while the K-5 II requires a separate lens.
  • More compact: Is smaller (109x62mm vs 131x97mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens built in (unlike the K-5 II).
  • Easier travel charging: Can be conveniently charged via its USB port.
  • 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 affordable: Was introduced at a lower price, despite coming with a built-in lens.
  • More modern: Reflects 9 years of technical progress since the K-5 II launch.

If the count of individual advantages (bullet points above) is taken as a guide, the GR IIIx is the clear winner of the contest (16 : 12 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

K-5 II 12:16 GR IIIx

How about other alternatives? Do the specifications of the Pentax K-5 II and the Ricoh GR IIIx 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 comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the K-5 II or the GR IIIx. 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 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-5 II5/5....80/1005/54.5/5 Sep 2012 US$ 1 099ebay.com
2.
 
Ricoh GR IIIx....4.5/5...... Sep 2021 US$ 999 amazon.com
3.
 
Fujifilm X-S105/5..4.5/586/1004.5/54.5/5 Oct 2020 US$ 999 amazon.com
4.
 
Nikon D71005/5+ +..85/1004.5/54.5/5 Feb 2013 US$ 1 199ebay.com
5.
 
Olympus E-M54/5+ +..80/1004.5/55/5 Feb 2012 US$ 1 299ebay.com
6.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 US$ 1 299ebay.com
7.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 US$ 1 099ebay.com
8.
 
Pentax K-54/5....83/1005/54.5/5 Sep 2010 US$ 1 099ebay.com
9.
 
Pentax K-304/5....78/1004.5/54.5/5 May 2012 US$ 849ebay.com
10.
 
Pentax K-505/5......5/54.5/5 Jun 2013 US$ 599ebay.com
11.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 US$ 649ebay.com
12.
 
Pentax K-500........4.5/54.5/5 Jun 2013 US$ 549ebay.com
13.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 US$ 1 099ebay.com
14.
 
Ricoh GR II........4.5/54.5/5 Jun 2015 US$ 699ebay.com
15.
 
Ricoh GR III4/5..3.5/581/1004/5.. Feb 2019 US$ 899 amazon.com
16.
 
Sony RX100 V4.5/5+ +..83/1004/54.5/5 Oct 2016 US$ 999ebay.com
17.
 
Sony RX100 VI4.5/5+ +..83/1004/54.5/5 Jun 2018 US$ 1 199ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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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Check GR IIIx price at
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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 a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Pentax K-5 II vs Ricoh GR IIIx

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Pentax K-5 II Ricoh GR IIIx
    Camera Type Digital single lens reflex Fixed lens compact camera
    Camera Lens Pentax K mount lenses 40mm f/2.8
    Launch Date September 2012 September 2021
    Launch Price USD 1,099 USD 999
    Sensor Specs Pentax K-5 II Ricoh GR IIIx
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 23.7 x 15.7 mm 23.5 x 15.6 mm
    Sensor Area 372.09 mm2 366.6 mm2
    Sensor Diagonal 28.4 mm 28.2 mm
    Crop Factor 1.5x 1.5x
    Sensor Resolution 16.1 Megapixels 24 Megapixels
    Image Resolution 4928 x 3264 pixels 6000 x 4000 pixels
    Pixel Pitch 4.81 μm 3.91 μm
    Pixel Density 4.32 MP/cm2 6.55 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/25p Video 1080/60p Video
    ISO Setting 100 - 12,800 ISO 100 - 102,400 ISO
    ISO Boost 80 - 51,200 ISO no Enhancement
    Image Processor PRIME II GR Engine VI
    DXO Sensor Quality (score) 82 ..
    DXO Color Depth (bits) 23.8 ..
    DXO Dynamic Range (EV) 14.1 ..
    DXO Low Light (ISO) 1235 ..
    Screen Specs Pentax K-5 II Ricoh GR IIIx
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.61x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 1037k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Pentax K-5 II Ricoh GR IIIx
    Focus System Phase-detect AF On-Sensor Phase-detect
    Continuous Shooting 7 shutter flaps/s 4 shutter flaps/s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Pentax K-5 II Ricoh GR IIIx
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 3.0
    HDMI Port mini HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Wifi Support no Wifi Wifi built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Pentax K-5 II Ricoh GR IIIx
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Pentax D-LI90 Ricoh DB-110
    Battery Life (CIPA)740 shots per charge200 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 131 x 97 x 73 mm
    (5.2 x 3.8 x 2.9 in)
    109 x 62 x 35 mm
    (4.3 x 2.4 x 1.4 in)
    Camera Weight 760 g (26.8 oz) 262 g (9.2 oz)
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    Check K-5 II offers at
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    Check GR IIIx price at
    amazon.com

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