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Fujifilm X-T1 vs Pentax K-S1

The Fujifilm X-T1 and the Pentax K-S1 are two digital cameras that were officially introduced, respectively, in January 2014 and August 2014. The X-T1 is a mirrorless interchangeable lens camera, while the K-S1 is a DSLR. Both cameras are equipped with an APS-C sensor. The Fujifilm has a resolution of 16 megapixels, whereas the Pentax provides 20 MP.

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

Headline Specifications
Fujifilm X-T1
versus
Pentax K-S1
Fujifilm X-T1   Pentax K-S1
Mirrorless system camera Digital single lens reflex
Fujifilm X mount lenses Pentax K mount lenses
16 MP – APS-C sensor 20 MP – APS-C sensor
1080/60p Video 1080/30p Video
ISO 200-6,400 (100 - 51,200) ISO 100-51,200
Electronic viewfinder (2360k dots) Optical viewfinder
3.0" LCD – 1040k dots 3.0" LCD – 921k dots
Tilting screen (no touchscreen) Fixed screen (not touch-sensitive)
8 shutter flaps per second 5.4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodynot weather sealed
350 shots per battery charge410 shots per battery charge
129 x 90 x 47 mm, 440 g 121 x 93 x 70 mm, 558 g
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Check X-T1 offers at
ebay.com
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Check K-S1 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Fujifilm X-T1 and the Pentax K-S1? 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 Fujifilm X-T1 and the Pentax K-S1 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The X-T1 can be obtained in two different colors (black, silver), while the K-S1 is available in four color-versions (black, grey, orange, white).

Size Fujifilm X-T1 vs Pentax K-S1
Compare X-T1 versus K-S1 top
Comparison X-T1 or K-S1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-S1 is somewhat smaller (3 percent) than the Fujifilm X-T1. However, the K-S1 is markedly heavier (27 percent) than the X-T1. It is worth mentioning in this context that the X-T1 is splash and dust resistant, while the K-S1 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 X-T1 gets 350 shots out of its Fujifilm NP-W126 battery, while the K-S1 can take 410 images on a single charge of its Pentax D-LI109 power pack.

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

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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 (USD)
Street
Price
1.
 
Fujifilm X-T1 129 mm 90 mm 47 mm 440 g 350 Y Jan 2014 1,299ebay.com
2.
 
Pentax K-S1 121 mm 93 mm 70 mm 558 g 410 n Aug 2014 749ebay.com
3.
 
Fujifilm X-A1 117 mm 67 mm 39 mm 330 g 350 n Sep 2013 399ebay.com
4.
 
Fujifilm X-A2 117 mm 67 mm 40 mm 350 g 410 n Jan 2015 399ebay.com
5.
 
Fujifilm X-E2 129 mm 75 mm 37 mm 350 g 350 n Oct 2013 999ebay.com
6.
 
Fujifilm X-M1 117 mm 67 mm 39 mm 330 g 350 n Jun 2013 699ebay.com
7.
 
Fujifilm X-Pro1 140 mm 82 mm 43 mm 450 g 300 n Jan 2012 1,699ebay.com
8.
 
Fujifilm X-Pro2 141 mm 83 mm 46 mm 495 g 350 Y Jan 2016 1,699ebay.com
9.
 
Fujifilm X-T2 133 mm 92 mm 49 mm 507 g 340 Y Jul 2016 1,599ebay.com
10.
 
Fujifilm X-T10 118 mm 83 mm 41 mm 381 g 350 n May 2015 799ebay.com
11.
 
Fujifilm X100S 127 mm 74 mm 54 mm 445 g 330 n Jan 2013 1,299ebay.com
12.
 
Fujifilm X100T 127 mm 74 mm 52 mm 440 g 330 n Sep 2014 1,299ebay.com
13.
 
Nikon D5300 125 mm 98 mm 76 mm 480 g 600 n Oct 2013 799ebay.com
14.
 
Nikon D5500 124 mm 97 mm 70 mm 470 g 820 n Jan 2015 899ebay.com
15.
 
Pentax K-500 130 mm 97 mm 71 mm 646 g 710 n Jun 2013 549ebay.com
16.
 
Pentax K-S2 123 mm 91 mm 73 mm 678 g 410 Y Feb 2015 749ebay.com
17.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 699ebay.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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The K-S1 was launched at a markedly lower price (by 42 percent) than the X-T1, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. 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.

Fujifilm X-T1 and Pentax K-S1 sensor measures

Despite having a slightly smaller sensor, the K-S1 offers a higher resolution of 20 megapixels, compared with 16 MP of the X-T1. 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 4.28μm versus 4.80μm for the X-T1). However, it should be noted that the K-S1 is a somewhat more recent model (by 6 months) than the X-T1, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

The resolution advantage of the Pentax K-S1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-S1 for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the Fujifilm X-T1 are 24.5 x 16.3 inches or 62.2 x 41.5 cm for good quality, 19.6 x 13.1 inches or 49.7 x 33.2 cm for very good quality, and 16.3 x 10.9 inches or 41.5 x 27.6 cm for excellent quality prints.

The X-T1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Fujifilm X-T1 has a native sensitivity range from ISO 200 to ISO 6400, which can be extended to ISO 100-51200. The corresponding ISO settings for the Pentax K-S1 are ISO 100 to ISO 51200 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. The X-T1 uses Fujifilm's X-Trans layout of photosites, while the K-S1 employs the more common Bayer array.

X-T1 versus K-S1 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"). 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.
 
Fujifilm X-T1 APS-C 16.0 4896 32641080/60p23.512.7142677
2.
 
Pentax K-S1 APS-C 20.0 5472 36481080/30p23.513.0106178
3.
 
Fujifilm X-A1 APS-C 16.0 4896 32641080/30p23.412.6139076
4.
 
Fujifilm X-A2 APS-C 16.0 4896 32641080/30p23.612.8151579
5.
 
Fujifilm X-E2 APS-C 16.0 4896 32641080/60p23.412.6140077
6.
 
Fujifilm X-M1 APS-C 16.0 4896 32641080/30p23.412.6137176
7.
 
Fujifilm X-Pro1 APS-C 16.0 4896 32641080/24p23.112.3123874
8.
 
Fujifilm X-Pro2 APS-C 24.0 6000 40001080/60p23.713.0160880
9.
 
Fujifilm X-T2 APS-C 24.0 6000 40004K/30p23.813.1165381
10.
 
Fujifilm X-T10 APS-C 16.0 4896 32641080/60p23.712.9154679
11.
 
Fujifilm X100S APS-C 16.0 4896 32641080/60p23.312.5132975
12.
 
Fujifilm X100T APS-C 16.0 4896 32641080/60p23.612.8148378
13.
 
Nikon D5300 APS-C 24.0 6000 40001080/60p24.013.9133883
14.
 
Nikon D5500 APS-C 24.0 6000 40001080/60p24.114.0143884
15.
 
Pentax K-500 APS-C 16.1 4928 32641080/30p23.713.1108779
16.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p23.612.9151479
17.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
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, but the X-T1 provides a higher frame rate than the K-S1. It can shoot video footage at 1080/60p, while the Pentax is limited to 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the X-T1 has an electronic viewfinder (2360k dots), while the K-S1 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 X-T1 has a higher magnification than the one of the K-S1 (0.77x vs 0.63x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Fujifilm X-T1 and Pentax K-S1 along with similar information for a selection of comparators.

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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.
 
Fujifilm X-T12360 n3.0 / 1040 tilting n 1/4000s 8.0/s n n
2.
 
Pentax K-S1optical n3.0 / 921 fixed n 1/6000s 5.4/s Y Y
3.
 
Fujifilm X-A1none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
4.
 
Fujifilm X-A2none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
5.
 
Fujifilm X-E22360 n3.0 / 1040 fixed n 1/4000s 7.0/s Y n
6.
 
Fujifilm X-M1none n3.0 / 920 tilting n 1/4000s 5.6/s Y n
7.
 
Fujifilm X-Pro11440 n3.0 / 1230 fixed n 1/4000s 6.0/s n n
8.
 
Fujifilm X-Pro22360 n3.0 / 1620 fixed n 1/8000s 8.0/s n n
9.
 
Fujifilm X-T22360 n3.0 / 1040 full-flex n 1/8000s 8.0/s n n
10.
 
Fujifilm X-T102360 n3.0 / 920 tilting n 1/4000s 8.0/s Y n
11.
 
Fujifilm X100S2360 n2.8 / 460 fixed n 1/4000s 6.0/s Y n
12.
 
Fujifilm X100T2360 n3.0 / 1040 fixed n 1/4000s 6.0/s Y n
13.
 
Nikon D5300optical n3.2 / 1037 swivel n 1/4000s 5.0/s Y n
14.
 
Nikon D5500optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
15.
 
Pentax K-500optical n3.0 / 921 fixed n 1/6000s 6.0/s Y Y
16.
 
Pentax K-S2optical n3.0 / 921 swivel n 1/6000s 5.4/s Y Y
17.
 
Sony A681440 Y2.7 / 460 tilting n 1/4000s 8.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the K-S1 and the X-T1 is in-body image stabilization (IBIS). The K-S1 reduces the risk of handshake-induced blur with all attached lenses, while the X-T1 offers no blur reduction with lenses that themselves do not provide optical image stabilization.

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 X-T1 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 Fujifilm X-T1 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the X-T1 and the K-S1 write their files to SDXC cards. The X-T1 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the K-S1 can use UHS-I cards (up to 104 MB/s).

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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 Fujifilm X-T1 and Pentax K-S1 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.
 
Fujifilm X-T1Ystereo / monoY-mini2.0Y--
2.
 
Pentax K-S1Ystereo / mono--micro2.0---
3.
 
Fujifilm X-A1Ystereo / mono--mini2.0Y--
4.
 
Fujifilm X-A2Ystereo / mono--mini2.0Y--
5.
 
Fujifilm X-E2Ystereo / monoY-micro2.0Y--
6.
 
Fujifilm X-M1Ystereo / mono--mini2.0Y--
7.
 
Fujifilm X-Pro1Ystereo / mono--mini2.0---
8.
 
Fujifilm X-Pro2Ystereo / monoY-micro2.0Y--
9.
 
Fujifilm X-T2Ystereo / monoY-micro3.0Y--
10.
 
Fujifilm X-T10Ystereo / monoY-micro2.0Y--
11.
 
Fujifilm X100SYstereo / mono--micro2.0---
12.
 
Fujifilm X100TYstereo / monoY-micro2.0Y--
13.
 
Nikon D5300Ystereo / monoY-mini2.0Y--
14.
 
Nikon D5500Ystereo / monoY-mini2.0Y--
15.
 
Pentax K-500Ymono / mono---2.0---
16.
 
Pentax K-S2Ymono / monoY-micro2.0YY-
17.
 
Sony A68Ystereo / monoY-micro2.0---

It is notable that the X-T1 has a microphone port, which is missing on the K-S1. 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 Fujifilm X-T1 (unlike the K-S1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the X-T1 and the K-S1 have been discontinued, but can regularly be found used on ebay. The X-T1 was replaced by the Fujifilm X-T2, while the K-S1 was followed by the Pentax K-S2. Further information on the features and operation of the X-T1 and K-S1 can be found, respectively, in the Fujifilm X-T1 Manual (free pdf) or the online Pentax K-S1 Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the Fujifilm X-T1 or the Pentax K-S1 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Advantages of the Fujifilm X-T1:

  • Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.77x vs 0.63x).
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster burst: Shoots at higher frequency (8 vs 5.4 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Less heavy: Is lighter (by 118g or 21 percent) and hence easier to carry around.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More heavily discounted: Has been on the market for longer (launched in January 2014).

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Arguments in favor of the Pentax K-S1:

  • More detail: Has more megapixels (20 vs 16MP), which boosts linear resolution by 12%.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Faster shutter: Has higher mechanical shutter speed (1/6000s vs 1/4000s) to freeze action.
  • Longer lasting: Gets more shots (410 versus 350) out of a single battery charge.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (42 percent cheaper at launch).
  • More modern: Was introduced somewhat (6 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the X-T1 is the clear winner of the match-up (17 : 8 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

X-T1 17:08 K-S1

How about other alternatives? Do the specifications of the Fujifilm X-T1 and the Pentax K-S1 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the X-T1 or the K-S1. 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 where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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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 (USD)
Street
Price
1.
 
Fujifilm X-T15/5+ +..84/1005/55/5 Jan 2014 1,299ebay.com
2.
 
Pentax K-S14/5......4.5/54/5 Aug 2014 749ebay.com
3.
 
Fujifilm X-A1........4.5/54.5/5 Sep 2013 399ebay.com
4.
 
Fujifilm X-A24/5......4.5/54.5/5 Jan 2015 399ebay.com
5.
 
Fujifilm X-E24/5....80/1004.5/55/5 Oct 2013 999ebay.com
6.
 
Fujifilm X-M13/5+..77/1004.5/54.5/5 Jun 2013 699ebay.com
7.
 
Fujifilm X-Pro15/5+ +..79/1004.5/54.5/5 Jan 2012 1,699ebay.com
8.
 
Fujifilm X-Pro2..+..83/1004.5/54.5/5 Jan 2016 1,699ebay.com
9.
 
Fujifilm X-T25/5+ +..86/1004.5/55/5 Jul 2016 1,599ebay.com
10.
 
Fujifilm X-T104.5/5+ +..80/1005/55/5 May 2015 799ebay.com
11.
 
Fujifilm X100S5/5+ +..81/1004.5/55/5 Jan 2013 1,299ebay.com
12.
 
Fujifilm X100T5/5+..81/1004.5/55/5 Sep 2014 1,299ebay.com
13.
 
Nikon D53004/5+ +..79/1004.5/54.5/5 Oct 2013 799ebay.com
14.
 
Nikon D55005/5+..79/1004.5/54.5/5 Jan 2015 899ebay.com
15.
 
Pentax K-500........4.5/54.5/5 Jun 2013 549ebay.com
16.
 
Pentax K-S24.5/5......5/54.5/5 Feb 2015 749ebay.com
17.
 
Sony A683/5......4/54/5 Nov 2015 699ebay.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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

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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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Fujifilm X-T1 vs Pentax K-S1

    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 Fujifilm X-T1 Pentax K-S1
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Fujifilm X mount lenses Pentax K mount lenses
    Launch Date January 2014 August 2014
    Launch Price USD 1,299 USD 749
    Sensor Specs Fujifilm X-T1 Pentax K-S1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 23.6 x 15.6 mm 23.5 x 15.6 mm
    Sensor Area 368.16 mm2 366.6 mm2
    Sensor Diagonal 28.3 mm 28.2 mm
    Crop Factor 1.5x 1.5x
    Sensor Resolution 16 Megapixels 20 Megapixels
    Image Resolution 4896 x 3264 pixels 5472 x 3648 pixels
    Pixel Pitch 4.80 μm 4.28 μm
    Pixel Density 4.34 MP/cm2 5.45 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/60p Video 1080/30p Video
    ISO Setting 200 - 6,400 ISO 100 - 51,200 ISO
    ISO Boost 100 - 51,200 ISO no Enhancement
    Image Processor EXR Processor II PRIME MII
    DXO Sensor Quality (score) .. 78
    DXO Color Depth (bits) .. 23.5
    DXO Dynamic Range (EV) .. 13.0
    DXO Low Light (ISO) .. 1061
    Screen Specs Fujifilm X-T1 Pentax K-S1
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.77x 0.63x
    Viewfinder Resolution 2360k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 921k dots
    LCD Attachment Tilting screen Fixed screen
    Shooting Specs Fujifilm X-T1 Pentax K-S1
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/6000s
    Continuous Shooting 8 shutter flaps/s 5.4 shutter flaps/s
    Electronic ShutterYESno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-II UHS-I
    Connectivity Specs Fujifilm X-T1 Pentax K-S1
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port no MIC socket
    Wifi Support Wifi built-in no Wifi
    Body Specs Fujifilm X-T1 Pentax K-S1
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Fujifilm NP-W126 Pentax D-LI109
    Battery Life (CIPA)350 shots per charge410 shots per charge
    Body Dimensions 129 x 90 x 47 mm
    (5.1 x 3.5 x 1.9 in)
    121 x 93 x 70 mm
    (4.8 x 3.7 x 2.8 in)
    Camera Weight 440 g (15.5 oz) 558 g (19.7 oz)
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    Check X-T1 offers at
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    Check K-S1 offers at
    ebay.com

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