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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   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 100-51200 ISO 100-16000 (100-25600)
Optical viewfinder Electronic viewfinder (1440k dots)
3.2" LCD, 1037k dots 2.7" LCD, 460k dots
Fixed screen (not touch-sensitive) Tilting screen (not touch-sensitive)
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

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, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Pentax K-3 II» 5.2 in 3.9 in 3.0 in 28.2 oz 720 Y Apr 2015 1,099 i i Pentax K-3 II
 
Sony A58« 5.1 in 3.7 in 3.1 in 17.4 oz 690 n Feb 2013 599- i Sony A58
 
Canon 80D« » 5.5 in 4.1 in 3.1 in 25.8 oz 960 Y Feb 2016 1,199- i Canon 80D
 
Canon T5i« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon T5i
 
Nikon D7200« » 5.4 in 4.2 in 3.0 in 27.0 oz 1110 Y Mar 2015 1,199- i Nikon D7200
 
Nikon D3200« » 4.9 in 3.8 in 3.0 in 17.8 oz 540 n Apr 2012 599- i Nikon D3200
 
Panasonic GX8« » 5.2 in 3.1 in 2.5 in 17.2 oz 330 Y Jul 2015 1,199- i Panasonic GX8
 
Pentax KP« » 5.2 in 4.0 in 3.0 in 24.8 oz 390 Y Jan 2017 1,099 i i Pentax KP
 
Pentax K-70« » 5.0 in 3.7 in 2.9 in 24.3 oz 410 Y Jun 2016 649 i i Pentax K-70
 
Pentax K-3« » 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299- i Pentax K-3
 
Pentax K-5« » 5.2 in 3.8 in 2.9 in 26.8 oz 740 Y Sep 2010 1,099- i Pentax K-5
 
Sony A6300« » 4.7 in 2.6 in 1.9 in 14.3 oz 400 Y Feb 2016 999- i Sony A6300
 
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399- i Sony A6500
 
Sony RX10 II« » 5.1 in 3.5 in 4.0 in 28.7 oz 400 Y Jun 2015 1,299- i Sony RX10 II
 
Sony A68« » 5.6 in 4.1 in 3.2 in 21.5 oz 540 n Nov 2015 699- i Sony A68
 
Sony A5100« » 4.3 in 2.5 in 1.4 in 10.0 oz 400 n Aug 2014 549 i i Sony A5100
 
Sony A3000« » 5.0 in 3.6 in 3.3 in 14.5 oz 470 n Aug 2013 329- i Sony A3000
Note: Measurements and pricing do not include easily detachable parts, such as 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 inch or 76.4 x 50.8 cm, for very good quality (250 dpi) 24.1 x 16 inch or 61.1 x 40.6 cm, and for excellent quality (300 dpi) 20.1 x 13.3 inch or 50.9 x 33.9 cm. The corresponding values for the Sony A58 are 27.3 x 18.2 inch or 69.3 x 46.1 cm for good quality, 21.8 x 14.5 inch or 55.4 x 36.9 cm for very good quality, and 18.2 x 12.1 inch 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.

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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Pentax K-3 II» APS-C 24.1 6016 40001080/60i23.613.6110680Pentax K-3 II
 
Sony A58« APS-C 19.8 5456 36321080/60i23.312.575374Sony A58
 
Canon 80D« » APS-C 24.0 6000 40001080/60p23.613.2113579Canon 80D
 
Canon T5i« » APS-C 17.9 5184 34561080/30p21.711.268161Canon T5i
 
Nikon D7200« » APS-C 24.0 6000 40001080/60p24.514.6133387Nikon D7200
 
Nikon D3200« » APS-C 24.1 6016 40001080/30p24.113.2113181Nikon D3200
 
Panasonic GX8« » Four Thirds 20.2 5184 38884K/30p23.512.680675Panasonic GX8
 
Pentax KP« » APS-C 24.1 6016 40001080/60i----Pentax KP
 
Pentax K-70« » APS-C 24.0 6000 40001080/60i----Pentax K-70
 
Pentax K-3« » APS-C 24.1 6016 40001080/60i23.713.4121680Pentax K-3
 
Pentax K-5« » APS-C 16.1 4928 32641080/25p23.714.1116282Pentax K-5
 
Sony A6300« » APS-C 24.0 6000 40004K/30p24.413.7143785Sony A6300
 
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585Sony A6500
 
Sony RX10 II« » 1-inch 20.0 5472 36484K/30p23.012.653170Sony RX10 II
 
Sony A68« » APS-C 24.0 6000 40001080/60i24.113.570179Sony A68
 
Sony A5100« » APS-C 24.0 6000 40001080/60p23.812.7134780Sony A5100
 
Sony A3000« » APS-C 19.8 5456 36321080/60i23.712.8106878Sony A3000

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.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Pentax K-3 II»optical Y 3.2 1037 fixed n 1/8000s 8.3 n Y Pentax K-3 II
 
Sony A58«1440 n 2.7 460 tilting n 1/4000s 5.0 Y Y Sony A58
 
Canon 80D« »optical Y 3.0 1040 swivel Y 1/8000s 7.0 Y n Canon 80D
 
Canon T5i« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon T5i
 
Nikon D7200« »optical Y 3.2 1229 fixed n 1/8000s 6.0 Y n Nikon D7200
 
Nikon D3200« »optical n 3.0 921 fixed n 1/4000s 4.0 Y n Nikon D3200
 
Panasonic GX8« »2360 n 3.0 1040 swivel Y 1/8000s 10.0 n Y Panasonic GX8
 
Pentax KP« »optical n 3.0 921 tilting n 1/6000s 7.0 Y Y Pentax KP
 
Pentax K-70« »optical n 3.0 921 swivel n 1/6000s 6.0 Y Y Pentax K-70
 
Pentax K-3« »optical Y 3.2 1037 fixed n 1/8000s 8.3 Y Y Pentax K-3
 
Pentax K-5« »optical Y 3.0 921 fixed n 1/8000s 7.0 Y Y Pentax K-5
 
Sony A6300« »2359 n 3.0 922 tilting n 1/4000s 11.0 Y n Sony A6300
 
Sony A6500« »2359 n 3.0 922 tilting Y 1/4000s 11.0 Y Y Sony A6500
 
Sony RX10 II« »2359 Y 3.0 1229 tilting n 1/3200s 14.0 Y Y Sony RX10 II
 
Sony A68« »1440 Y 2.7 460 tilting n 1/4000s 8.0 Y Y Sony A68
 
Sony A5100« »- n 3.0 922 tilting Y 1/4000s 6.0 Y n Sony A5100
 
Sony A3000« »202 n 3.0 230 fixed n 1/4000s 2.5 Y n Sony A3000

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.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Pentax K-3 II»YmonomonoYYmini3.0---Pentax K-3 II
 
Sony A58«YstereomonoY-mini2.0---Sony A58
 
Canon 80D« »YstereomonoYYmini2.0YY-Canon 80D
 
Canon T5i« »YstereomonoY-mini2.0---Canon T5i
 
Nikon D7200« »YstereomonoYYmini2.0YY-Nikon D7200
 
Nikon D3200« »YmonomonoY-mini2.0---Nikon D3200
 
Panasonic GX8« »YstereomonoY-micro2.0YY-Panasonic GX8
 
Pentax KP« »YstereomonoY--2.0Y--Pentax KP
 
Pentax K-70« »YstereomonoY-mini2.0Y--Pentax K-70
 
Pentax K-3« »YmonomonoYYmini3.0---Pentax K-3
 
Pentax K-5« »YstereomonoY-mini2.0---Pentax K-5
 
Sony A6300« »YstereomonoY-micro2.0YY-Sony A6300
 
Sony A6500« »YstereomonoY-micro2.0YY-Sony A6500
 
Sony RX10 II« »YstereomonoYYmicro2.0YY-Sony RX10 II
 
Sony A68« »YstereomonoY-micro2.0---Sony A68
 
Sony A5100« »-stereomono--micro2.0YY-Sony A5100
 
Sony A3000« »Ystereomono--mini2.0---Sony A3000

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.

The K-3 II is a recent model that features in the current product line-up of Pentax. In contrast, the A58 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the A58 was succeeded by the Sony A68. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax and Sony websites.


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 (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Pentax K-3 II»--5/54.5/55/5 Apr 2015 1,099 i i Pentax K-3 II
 
Sony A58«--4.5/54.5/54.5/5 Feb 2013 599- i Sony A58
 
Canon 80D« »+ +84/1004.5/54.5/54.5/5 Feb 2016 1,199- i Canon 80D
 
Canon T5i« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon T5i
 
Nikon D7200« »+ +84/1004.5/54/54.5/5 Mar 2015 1,199- i Nikon D7200
 
Nikon D3200« »+ +73/1004.5/54.5/54.5/5 Apr 2012 599- i Nikon D3200
 
Panasonic GX8« »+82/1004.5/55/54.5/5 Jul 2015 1,199- i Panasonic GX8
 
Pentax KP« »-82/1005/5-4.5/5 Jan 2017 1,099 i i Pentax KP
 
Pentax K-70« »-79/1004.5/54/54.5/5 Jun 2016 649 i i Pentax K-70
 
Pentax K-3« »-83/1005/54.5/55/5 Oct 2013 1,299- i Pentax K-3
 
Pentax K-5« »-83/1005/54.5/54.5/5 Sep 2010 1,099- i Pentax K-5
 
Sony A6300« »+85/1005/55/55/5 Feb 2016 999- i Sony A6300
 
Sony A6500« »+ +85/1004.5/55/54.5/5 Oct 2016 1,399- i Sony A6500
 
Sony RX10 II« »+ +82/1004.5/54.5/54/5 Jun 2015 1,299- i Sony RX10 II
 
Sony A68« »--4/5-4/5 Nov 2015 699- i Sony A68
 
Sony A5100« »+-4.5/54.5/55/5 Aug 2014 549 i i Sony A5100
 
Sony A3000« »+-4/54.5/54/5 Aug 2013 329- i Sony A3000
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.

Pentax K-3 II:
Check Amazon price
Sony A58:
Check Ebay offers

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 1099 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 100-51200 ISO 100-16000 ISO
    ISO Boost no Enhancement 100-25600 ISO
    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 3.2 inch 2.7 inch
    LCD Resolution 1037k dots 460k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Pentax K-3 II Sony A58
    Autofocus System Phase-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000/s 1/4000/s
    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 Build-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option 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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