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Pentax K-3 II vs Sony A58

The Pentax K-3 II and the Sony Alpha SLT-A58 are two digital cameras that were revealed to the public, respectively, in April 2015 and February 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Pentax has a resolution of 24.1 megapixels, whereas the Sony provides 19.8 MP.

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

Headline Specifications
Pentax K-3 II
versus
Sony A58
Pentax K-3 II   Sony A58
Digital single lens reflex Digital single lens reflex
Pentax K mount lenses Sony A mount lenses
24.1 MP – APS-C sensor 19.8 MP – APS-C sensor
1080/60i Video 1080/60i Video
ISO 100-51,200 ISO 100-16,000 (100 - 25,600)
Optical viewfinder Electronic viewfinder (1440k dots)
3.2" LCD – 1037k dots 2.7" LCD – 460k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
8.3 shutter flaps per second 5 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodynot weather sealed
720 shots per battery charge690 shots per battery charge
131 x 100 x 77 mm, 800 g 129 x 95 x 78 mm, 492 g
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Check A58 offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-3 II and the Sony Alpha SLT-A58? 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 Pentax K-3 II and the Sony A58. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The K-3 II can be obtained in two different colors (black, silver), while the A58 is only available in black.

Size Pentax K-3 II vs Sony A58
Compare K-3 II versus A58 top
Comparison K-3 II or A58 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A58 is notably smaller (6 percent) than the Pentax K-3 II. Moreover, the A58 is substantially lighter (39 percent) than the K-3 II. It is worth mentioning in this context that the K-3 II is splash and dust resistant, while the A58 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the K-3 II gets 720 shots out of its D-LI90 battery, while the A58 can take 690 images on a single charge of its NP-FM500H power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099ebay.com
2.
 
Sony A58 129 mm 95 mm 78 mm 492 g 690 n Feb 2013 599ebay.com
3.
 
Canon 80D 139 mm 105 mm 79 mm 730 g 960 Y Feb 2016 1,199ebay.com
4.
 
Nikon D7200 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199ebay.com
5.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599ebay.com
6.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 amazon.com
7.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099ebay.com
8.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649 amazon.com
9.
 
Pentax K-S2 123 mm 91 mm 73 mm 678 g 410 Y Feb 2015 749ebay.com
10.
 
Pentax K-S1 121 mm 93 mm 70 mm 558 g 410 n Aug 2014 749ebay.com
11.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299ebay.com
12.
 
Pentax K-5 II 131 mm 97 mm 73 mm 760 g 740 Y Sep 2012 1,099ebay.com
13.
 
Pentax K-5 131 mm 97 mm 73 mm 760 g 740 Y Sep 2010 1,099ebay.com
14.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 699ebay.com
15.
 
Sony A5100 110 mm 63 mm 36 mm 283 g 400 n Aug 2014 549ebay.com
16.
 
Sony A6000 120 mm 67 mm 45 mm 344 g 360 n Feb 2014 599ebay.com
17.
 
Sony A3000 128 mm 91 mm 85 mm 411 g 470 n Aug 2013 329ebay.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 obviously take relative prices into account. 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 A58 was launched at a markedly lower price (by 45 percent) than the K-3 II, which puts it into a different market segment. 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 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 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 and have a format factor (sometimes also referred to as "crop factor") of 1.5. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Pentax K-3 II and Sony A58 sensor measures

While the two cameras under review share the same sensor size, the K-3 II offers a higher resolution of 24.1 megapixels, compared with 19.8 MP of the A58. This megapixels advantage translates into a 10 percent gain in linear resolution. On the other hand, these sensor specs imply that the K-3 II has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.90μm versus 4.31μm for the A58). In this context, it should be noted, however, that the K-3 II is much more recent (by 2 years and 2 months) than the A58, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that the K-3 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax K-3 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-3 II for good quality output (200 dots per inch) amounts to 30.1 x 20 inches or 76.4 x 50.8 cm, for very good quality (250 dpi) 24.1 x 16 inches or 61.1 x 40.6 cm, and for excellent quality (300 dpi) 20.1 x 13.3 inches or 50.9 x 33.9 cm. The corresponding values for the Sony A58 are 27.3 x 18.2 inches or 69.3 x 46.1 cm for good quality, 21.8 x 14.5 inches or 55.4 x 36.9 cm for very good quality, and 18.2 x 12.1 inches or 46.2 x 30.8 cm for excellent quality prints.

Unlike the A58, the K-3 II has the capacity to capture high quality composite images by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Pentax K-3 II has a native sensitivity range from ISO 100 to ISO 51200. The corresponding ISO settings for the Sony Alpha SLT-A58 are ISO 100 to ISO 16000, with the possibility to increase the ISO range to 100-25600.

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-3 II versus A58 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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"). Of the two cameras under review, the K-3 II has a notably higher overall DXO score than the A58 (overall score 6 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.3 bits higher color depth, 1.1 EV in additional dynamic range, and 0.6 stops in additional low light sensitivity. 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
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
2.
 
Sony A58 APS-C 19.8 5456 36321080/60i23.312.575374
3.
 
Canon 80D APS-C 24.0 6000 40001080/60p23.613.2113579
4.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
5.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
6.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
7.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
8.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
9.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p23.612.9151479
10.
 
Pentax K-S1 APS-C 20.0 5472 36481080/30p23.513.0106178
11.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
12.
 
Pentax K-5 II APS-C 16.1 4928 32641080/25p23.814.1123582
13.
 
Pentax K-5 APS-C 16.1 4928 32641080/25p23.714.1116282
14.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
15.
 
Sony A5100 APS-C 24.0 6000 40001080/60p23.812.7134780
16.
 
Sony A6000 APS-C 24.0 6000 40001080/60p24.113.1134782
17.
 
Sony A3000 APS-C 19.8 5456 36321080/60i23.712.8106878
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, and both provide the same movie specifications (1080/60i).

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A58 has an electronic viewfinder (1440k dots), while the K-3 II has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the K-3 II has a higher magnification than the one of the A58 (0.63x vs 0.57x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Pentax K-3 II and Sony A58 in connection with corresponding information for a sample of similar cameras.

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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.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
2.
 
Sony A581440 n2.7 / 460 tilting n 1/4000s 5.0/s Y Y
3.
 
Canon 80Doptical Y3.0 / 1040 swivel Y 1/8000s 7.0/s Y n
4.
 
Nikon D7200optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
5.
 
Nikon D3200optical n3.0 / 921 fixed n 1/4000s 4.0/s Y n
6.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
7.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
8.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
9.
 
Pentax K-S2optical n3.0 / 921 swivel n 1/6000s 5.4/s Y Y
10.
 
Pentax K-S1optical n3.0 / 921 fixed n 1/6000s 5.4/s Y Y
11.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
12.
 
Pentax K-5 IIoptical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
13.
 
Pentax K-5optical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
14.
 
Sony A681440 Y2.7 / 460 tilting n 1/4000s 8.0/s Y Y
15.
 
Sony A5100none n3.0 / 922 tilting Y 1/4000s 6.0/s Y n
16.
 
Sony A60001440 n3.0 / 922 tilting n 1/4000s 11.0/s Y n
17.
 
Sony A3000202 n3.0 / 230 fixed n 1/4000s 2.5/s Y n
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the K-3 II, but is missing on the A58 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

The Pentax K-3 II 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.

The K-3 II writes its imaging data to SDXC cards, while the A58 uses SDXC or Memory Stick PRO Duo cards. The K-3 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the A58 only has one slot. The K-3 II supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the A58 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-3 II and Sony Alpha SLT-A58 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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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.
 
Pentax K-3 IIYmono / monoYYmini3.0---
2.
 
Sony A58Ystereo / monoY-mini2.0---
3.
 
Canon 80DYstereo / monoYYmini2.0YY-
4.
 
Nikon D7200Ystereo / monoYYmini2.0YY-
5.
 
Nikon D3200Ymono / monoY-mini2.0---
6.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
7.
 
Pentax KPYstereo / monoY--2.0Y--
8.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
9.
 
Pentax K-S2Ymono / monoY-micro2.0YY-
10.
 
Pentax K-S1Ystereo / mono--micro2.0---
11.
 
Pentax K-3Ymono / monoYYmini3.0---
12.
 
Pentax K-5 IIYstereo / monoY-mini2.0---
13.
 
Pentax K-5Ystereo / monoY-mini2.0---
14.
 
Sony A68Ystereo / monoY-micro2.0---
15.
 
Sony A5100-stereo / mono--micro2.0YY-
16.
 
Sony A6000Ystereo / mono--micro2.0YY-
17.
 
Sony A3000Ystereo / mono--mini2.0---

It is notable that the K-3 II has a headphone jack, which is not present on the A58 This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Studio photographers will appreciate that the Pentax K-3 II (unlike the A58) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the K-3 II has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the K-3 II and the A58 have been discontinued, but can regularly be found used on ebay. The A58 was replaced by the Sony A68, while the K-3 II was followed by the Pentax K-3 III. Further information on the features and operation of the K-3 II and A58 can be found, respectively, in the Pentax K-3 II Manual (free pdf) or the online Sony A58 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Pentax K-3 II and the Sony A58? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Reasons to prefer the Pentax K-3 II:

  • More detail: Offers more megapixels (24.1 vs 19.8MP) with a 10% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1.1 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (0.6 stops ISO advantage).
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.63x vs 0.57x).
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 2.7") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 460k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (8.3 vs 5 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 2 years and 2 months of technical progress since the A58 launch.

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Advantages of the Sony Alpha SLT-A58:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Less heavy: Has a lower weight (by 308g or 38 percent) and is thus easier to take along.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (45 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in February 2013).

If the count of relative strengths (bullet points above) is taken as a measure, the K-3 II is the clear winner of the match-up (22 : 7 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

K-3 II 22:07 A58

How about other alternatives? Do the specifications of the Pentax K-3 II and the Sony A58 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the K-3 II or the A58 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 why hands-on reviews by experts 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099ebay.com
2.
 
Sony A583/5......4.5/54.5/5 Feb 2013 599ebay.com
3.
 
Canon 80D4/5+ +4.5/584/1004.5/54.5/5 Feb 2016 1,199ebay.com
4.
 
Nikon D72004/5+ +..84/1004.5/54.5/5 Mar 2015 1,199ebay.com
5.
 
Nikon D32005/5+ +..73/1004.5/54.5/5 Apr 2012 599ebay.com
6.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 amazon.com
7.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099ebay.com
8.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 649 amazon.com
9.
 
Pentax K-S24.5/5......5/54.5/5 Feb 2015 749ebay.com
10.
 
Pentax K-S14/5......4.5/54/5 Aug 2014 749ebay.com
11.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 1,299ebay.com
12.
 
Pentax K-5 II5/5....80/1005/54.5/5 Sep 2012 1,099ebay.com
13.
 
Pentax K-54/5....83/1005/54.5/5 Sep 2010 1,099ebay.com
14.
 
Sony A683/5......4/54/5 Nov 2015 699ebay.com
15.
 
Sony A51004.5/5+....4.5/55/5 Aug 2014 549ebay.com
16.
 
Sony A60005/5+4.5/580/1004.5/55/5 Feb 2014 599ebay.com
17.
 
Sony A30003/5+....4/54/5 Aug 2013 329ebay.com
Notes: (+ +) 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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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 K-3 II offers at
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Check A58 offers 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 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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    Specifications: Pentax K-3 II vs Sony A58

    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-3 II Sony A58
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Pentax K mount lenses Sony A mount lenses
    Launch Date April 2015 February 2013
    Launch Price USD 1,099 USD 599
    Sensor Specs Pentax K-3 II Sony A58
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 23.5 x 15.6 mm 23.5 x 15.6 mm
    Sensor Area 366.6 mm2 366.6 mm2
    Sensor Diagonal 28.2 mm 28.2 mm
    Crop Factor 1.5x 1.5x
    Sensor Resolution 24.1 Megapixels 19.8 Megapixels
    Image Resolution 6016 x 4000 pixels 5456 x 3632 pixels
    Pixel Pitch 3.90 μm 4.31 μm
    Pixel Density 6.56 MP/cm2 5.41 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 1080/60i Video 1080/60i Video
    ISO Setting 100 - 51,200 ISO 100 - 16,000 ISO
    ISO Boost no Enhancement 100 - 25,600 ISO
    Image Processor PRIME III BIONZ
    DXO Sensor Quality (score) 80 74
    DXO Color Depth (bits) 23.6 23.3
    DXO Dynamic Range (EV) 13.6 12.5
    DXO Low Light (ISO) 1106 753
    Screen Specs Pentax K-3 II Sony A58
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.63x 0.57x
    Viewfinder Resolution 1440k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 2.7inch
    LCD Resolution 1037k dots 460k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Pentax K-3 II Sony A58
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/4000s
    Continuous Shooting 8.3 shutter flaps/s 5 shutter flaps/s
    Shutter Life Expectancy200 000 actuations100 000 actuations
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support UHS-I no
    Connectivity Specs Pentax K-3 II Sony A58
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.0 USB 2.0
    HDMI Port mini HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone port
    Wifi Support no Wifi no Wifi
    Geotagging GPS built-in no internal GPS
    Body Specs Pentax K-3 II Sony A58
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type D-LI90 NP-FM500H
    Battery Life (CIPA)720 shots per charge690 shots per charge
    Body Dimensions 131 x 100 x 77 mm
    (5.2 x 3.9 x 3.0 in)
    129 x 95 x 78 mm
    (5.1 x 3.7 x 3.1 in)
    Camera Weight 800 g (28.2 oz) 492 g (17.4 oz)
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    Check A58 offers at
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