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Pentax K-3 III vs Sigma fp L

The Pentax K-3 III and the Sigma fp L are two digital cameras that were announced in March 2021. The K-3 III is a DSLR, while the fp L is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (K-3 III) and a full frame (fp L) sensor. The Pentax has a resolution of 25.6 megapixels, whereas the Sigma provides 60.2 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 III
versus
Sigma fp L
Pentax K-3 III   Sigma fp L
Digital single lens reflex Mirrorless system camera
Pentax K mount lenses Leica L mount lenses
25.6 MP – APS-C sensor 60.2 MP – Full Frame sensor
4K/30p Video 4K/30p Video
ISO 100-160,000 ISO 100-25,600 (6 - 102,400)
Optical viewfinder Viewfinder optional
3.2" LCD – 1620k dots 3.2" LCD – 2100k dots
Fixed touchscreen Fixed touchscreen
12 shutter flaps per second 10 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
800 shots per battery charge240 shots per battery charge
135 x 104 x 74 mm, 820 g 113 x 70 x 45 mm, 427 g
logo
Check K-3 III price at
amazon.com
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Check fp L price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-3 III and the Sigma fp L? 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

An illustration of the physical size and weight of the Pentax K-3 III and the Sigma fp L is provided 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 width, height and depth measures are rounded to the nearest millimeter.

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

Size Pentax K-3 III vs Sigma fp L
Compare K-3 III versus fp L top
Comparison K-3 III or fp L rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sigma fp L is considerably smaller (44 percent) than the Pentax K-3 III. Moreover, the fp L is substantially lighter (48 percent) than the K-3 III. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 III gets 800 shots out of its Pentax D-LI90 battery, while the fp L can take 240 images on a single charge of its Sigma BP-51 power pack. The power pack in the fp L 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. 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
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 US$ 1 999 amazon.com
2.
 
Sigma fp L 113 mm 70 mm 45 mm 427 g 240 Y Mar 2021 US$ 2 499 amazon.com
3.
 
Fujifilm X-H1 140 mm 97 mm 86 mm 673 g 310 Y Feb 2018 US$ 1 899ebay.com
4.
 
Fujifilm X-T4 135 mm 93 mm 64 mm 607 g 500 Y Feb 2020 US$ 1 699ebay.com
5.
 
Leica M11 139 mm 80 mm 39 mm 640 g 700 Y Jan 2022 US$ 8 999 amazon.com
6.
 
Nikon D780 144 mm 116 mm 76 mm 840 g 2260 Y Jan 2020 US$ 2 299 amazon.com
7.
 
Nikon Z6 II 134 mm 101 mm 70 mm 705 g 410 Y Oct 2020 US$ 1 999 amazon.com
8.
 
Panasonic S5 133 mm 98 mm 82 mm 714 g 440 Y Sep 2020 US$ 1 999 amazon.com
9.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 US$ 1 299ebay.com
10.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 US$ 1 099ebay.com
11.
 
Pentax K-5 II 131 mm 97 mm 73 mm 760 g 740 Y Sep 2012 US$ 1 099ebay.com
12.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 US$ 649ebay.com
13.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 US$ 1 099ebay.com
14.
 
Pentax K-S2 123 mm 91 mm 73 mm 678 g 410 Y Feb 2015 US$ 749ebay.com
15.
 
Sigma fp 113 mm 70 mm 45 mm 422 g 280 Y Jul 2019 US$ 1 899 amazon.com
16.
 
Sony A7R 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 US$ 2 299ebay.com
17.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 US$ 2 499ebay.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 K-3 III was launched at a somewhat lower price (by 20 percent) than the fp L, which makes it more attractive for photographers on a tight budget. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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. 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.

Of the two cameras under consideration, the Pentax K-3 III features an APS-C sensor and the Sigma fp L a full frame sensor. The sensor area in the fp L is 139 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Pentax K-3 III and Sigma fp L sensor measures

With 60.2MP, the fp L offers a higher resolution than the K-3 III (25.6MP), but the fp L nevertheless has marginally larger individual pixels (pixel pitch of 3.79μm versus 3.76μm for the K-3 III) due to its larger sensor. It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. Coming back to sensor resolution, it should be mentioned that the K-3 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sigma fp L implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the fp L for good quality output (200 dots per inch) amounts to 47.6 x 31.6 inches or 120.9 x 80.4 cm, for very good quality (250 dpi) 38.1 x 25.3 inches or 96.7 x 64.3 cm, and for excellent quality (300 dpi) 31.7 x 21.1 inches or 80.6 x 53.6 cm. The corresponding values for the Pentax K-3 III are 31 x 20.6 inches or 78.6 x 52.4 cm for good quality, 24.8 x 16.5 inches or 62.9 x 41.9 cm for very good quality, and 20.6 x 13.8 inches or 52.4 x 35 cm for excellent quality prints.

Unlike the fp L, the K-3 III has the capacity to capture high quality composite images (YESMP) 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 III has a native sensitivity range from ISO 100 to ISO 160000. The corresponding ISO settings for the Sigma fp L are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 6-102400.

In terms of underlying technology, the K-3 III is build around a CMOS sensor, while the fp L uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

K-3 III versus fp L MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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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-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
2.
 
Sigma fp L Full Frame 60.2 9520 63284K/30p25.314.4300196
3.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
4.
 
Fujifilm X-T4 APS-C 26.0 6240 41604K/60p24.113.6199584
5.
 
Leica M11 Full Frame 60.3 9528 6328none26.314.83376100
6.
 
Nikon D780 Full Frame 24.3 6048 40244K/30p25.314.3287795
7.
 
Nikon Z6 II Full Frame 24.3 6048 40244K/60p25.014.4330394
8.
 
Panasonic S5 Full Frame 24.0 6000 40004K/60p25.114.5269794
9.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
10.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
11.
 
Pentax K-5 II APS-C 16.1 4928 32641080/25p23.814.1123582
12.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
13.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
14.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p23.612.9151479
15.
 
Sigma fp Full Frame 24.0 6000 40004K/30p25.214.2282994
16.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
17.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (4K/30p).

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the K-3 III has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the fp L relies on live view and the rear LCD for framing. That said, the fp L can be equipped with an optional viewfinder – the EVF-11. The table below summarizes some of the other core capabilities of the Pentax K-3 III and Sigma fp L 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-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
2.
 
Sigma fp Loptional n3.2 / 2100 fixed Y 1/8000s 10.0/s n n
3.
 
Fujifilm X-H13690 Y3.0 / 1040 full-flex Y 1/8000s 14.0/s n Y
4.
 
Fujifilm X-T43690 n3.0 / 1620 swivel Y 1/8000s 15.0/s n Y
5.
 
Leica M11optical n3.0 / 2333 fixed Y 1/4000s 4.5/s n n
6.
 
Nikon D780optical Y3.2 / 2359 tilting Y 1/8000s 12.0/s n n
7.
 
Nikon Z6 II3690 Y3.2 / 2100 tilting Y 1/8000s 14.0/s n Y
8.
 
Panasonic S52360 n3.0 / 1840 swivel Y 1/8000s 7.0/s n Y
9.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
10.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
11.
 
Pentax K-5 IIoptical Y3.0 / 921 fixed n 1/8000s 7.0/s Y Y
12.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
13.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
14.
 
Pentax K-S2optical n3.0 / 921 swivel n 1/6000s 5.4/s Y Y
15.
 
Sigma fpoptional n3.2 / 2100 fixed Y 1/8000s 12.0/s n n
16.
 
Sony A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
17.
 
Sony A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the K-3 III, but is missing on the fp L 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 reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the fp L is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Pentax K-3 III and the Sigma fp L 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-3 III and the fp L write their files to SDXC cards. The K-3 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the fp L only has one slot. Both cameras support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 MB/s (the second slot of the K-3 III supports only UHS-I, though).

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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 III and Sigma fp L 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-3 IIIYstereo / monoYYmicro3.2Y-Y
2.
 
Sigma fp LYstereo / monoYYmicro3.2Y--
3.
 
Fujifilm X-H1Ystereo / monoY-micro3.0Y--
4.
 
Fujifilm X-T4Ystereo / monoY-micro3.1Y-Y
5.
 
Leica M11Y- / ----3.2Y-Y
6.
 
Nikon D780Ystereo / monoYYmini3.1Y-Y
7.
 
Nikon Z6 IIYstereo / monoYYmicro3.2Y-Y
8.
 
Panasonic S5Ystereo / monoYYmicro3.2Y-Y
9.
 
Pentax K-3Ymono / monoYYmini3.0---
10.
 
Pentax K-3 IIYmono / monoYYmini3.0---
11.
 
Pentax K-5 IIYstereo / monoY-mini2.0---
12.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
13.
 
Pentax KPYstereo / monoY--2.0Y--
14.
 
Pentax K-S2Ymono / monoY-micro2.0YY-
15.
 
Sigma fpYstereo / monoY-micro3.1---
16.
 
Sony A7RYstereo / monoYYmicro2.0YY-
17.
 
Sony A7SYstereo / monoYYmicro2.0YY-

Studio photographers will appreciate that the Pentax K-3 III (unlike the fp L) 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 III has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the K-3 III and the fp L are recent models that are part of the current product line-up. The K-3 III replaced the earlier Pentax K-3 II, while the fp L does not have a direct predecessor. Further information on the features and operation of the K-3 III and fp L can be found, respectively, in the Pentax K-3 III Manual (free pdf) or the online Sigma fp L Manual.

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Review summary

So what conclusions can be drawn? Is the Pentax K-3 III better than the Sigma fp L or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Pentax K-3 III:

  • 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.
  • 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 burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • Longer lasting: Can take more shots (800 versus 240) on a single battery charge.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • 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.
  • More affordable: Was introduced into a lower priced segment (20 percent cheaper at launch).

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Reasons to prefer the Sigma fp L:

  • More detail: Has more megapixels (60.2 vs 25.6MP), which boosts linear resolution by 54%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
  • Richer colors: The pixel size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
  • More detailed LCD: Has a higher resolution rear screen (2100k vs 1620k dots).
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (113x70mm vs 135x104mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 393g or 48 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (12 points each). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

K-3 III 12:12 fp L

How about other alternatives? Do the specifications of the Pentax K-3 III and the Sigma fp L place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens 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 incomplete and does no justice, for example, to the way the K-3 III or the fp L 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 US$ 1 999 amazon.com
2.
 
Sigma fp L4/5..4/5..4/54/5 Mar 2021 US$ 2 499 amazon.com
3.
 
Fujifilm X-H1..+5/586/1004.5/54.5/5 Feb 2018 US$ 1 899ebay.com
4.
 
Fujifilm X-T45/5+ +5/588/1005/55/5 Feb 2020 US$ 1 699ebay.com
5.
 
Leica M114.5/5..4.5/5..4.5/54.5/5 Jan 2022 US$ 8 999 amazon.com
6.
 
Nikon D7805/5..5/587/1004.5/54.5/5 Jan 2020 US$ 2 299 amazon.com
7.
 
Nikon Z6 II4.5/5..4/589/1004.5/54.5/5 Oct 2020 US$ 1 999 amazon.com
8.
 
Panasonic S54.5/5+ +4.5/588/1004.5/54.5/5 Sep 2020 US$ 1 999 amazon.com
9.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 US$ 1 299ebay.com
10.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 US$ 1 099ebay.com
11.
 
Pentax K-5 II5/5....80/1005/54.5/5 Sep 2012 US$ 1 099ebay.com
12.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 US$ 649ebay.com
13.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 US$ 1 099ebay.com
14.
 
Pentax K-S24.5/5......5/54.5/5 Feb 2015 US$ 749ebay.com
15.
 
Sigma fp4/5..4/5..4/54.5/5 Jul 2019 US$ 1 899 amazon.com
16.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 US$ 2 299ebay.com
17.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 US$ 2 499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, 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 III price at
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Check fp L price at
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Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu 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-3 III vs Sigma fp L

    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 III Sigma fp L
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Pentax K mount lenses Leica L mount lenses
    Launch Date March 2021 March 2021
    Launch Price USD 1,999 USD 2,499
    Sensor Specs Pentax K-3 III Sigma fp L
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.3 x 15.5 mm 36.0 x 24.0 mm
    Sensor Area 361.15 mm2 864 mm2
    Sensor Diagonal 28 mm 43.3 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 25.6 Megapixels 60.2 Megapixels
    Image Resolution 6192 x 4128 pixels 9520 x 6328 pixels
    Pixel Pitch 3.76 μm 3.79 μm
    Pixel Density 7.08 MP/cm2 6.97 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 4K/30p Video
    ISO Setting 100 - 160,000 ISO 100 - 25,600 ISO
    ISO Boost no Enhancement 6 - 102,400 ISO
    Screen Specs Pentax K-3 III Sigma fp L
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.70x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.2inch
    LCD Resolution 1620k dots 2100k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Pentax K-3 III Sigma fp L
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 12 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterno E-Shutterup to 1/8000s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support Single UHS-II UHS-II
    Connectivity Specs Pentax K-3 III Sigma fp L
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.2 USB 3.2
    HDMI Port micro HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Bluetooth Support Bluetooth built-in no Bluetooth
    Geotagging GPS built-in no internal GPS
    Body Specs Pentax K-3 III Sigma fp L
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Pentax D-LI90 Sigma BP-51
    Battery Life (CIPA)800 shots per charge240 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    113 x 70 x 45 mm
    (4.4 x 2.8 x 1.8 in)
    Camera Weight 820 g (28.9 oz) 427 g (15.1 oz)
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    Check fp L price at
    amazon.com

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