Fujifilm X-T3 vs Pentax K-S1

  • APS-C
  • 26 megapixels
  • Fujifilm X
  • 48
    Overall
  • 21
    Imaging
  • 78
    Features
  • 74
    Size
  • 0
    Price
  • APS-C
  • 20 megapixels
  • Pentax KAF2
  • 42
    Overall
  • 14
    Imaging
  • 37
    Features
  • 74
    Size
  • 0
    Price

Fujifilm X-T3 vs Pentax K-S1: a Complete Review and Comparison

Are you looking for the best camera to suit your needs? Due to a wide range of options, making a wise and weighted decision can be rather challenging. Which specs to keep in mind? What are the key pros and cons of each model? This comparison should give some helpful hints!

In this review, we are going to make a detailed comparison of two cameras that fall into different categories. While the first model we are looking at, Fujifilm X-T3 belongs to a Semi-Pro Mirrorless category, the other model, Fujifilm X-T3 is a Semi-Pro DSLR camera. Both models feature different types of sensors. Thus, Fujifilm X-T3 comes with BSI-CMOS sensor that has a resolution of 26.0 MP resolution, while our second compared model Pentax K-S1 features a 20.0 MP CMOS sensor.

Both cameras we are going to look at in our overview fall into two different categories - MirrorLess and DSLR. Keeping in mind all the distinctive features of each category, it will be hard to make a detailed comparison of these two models. However, we will do our best to make this review as unbiased and detailed as possible.

To get started, let’s take a look at some of the key features of Fujifilm X-T3 and Pentax K-S1 and, after this, we can go on to our detailed comparison of these models.

Fujifilm X-T3 Key Features:

  • 26.0 MP APS-C BSI-CMOS sensor
  • ISO 160 - 12800 (Expands to 80 - 51200)
  • Image Stabilization: No
  • 3.2″ Tilting Screen
  • ViewFinder: Yes
  • 20.0 fps Continuous Shooting
  • Video: 4096x2160 (60p/50p/30p/25p/24p/23.98p)
  • Built-in Wireless: Yes
  • Dimensions: 133 x 93 x 59 mm
  • Weight: 539 g
  • Environmental Sealing: Yes
  • Built-in GPS: No
  • Replaced Fujifilm X-T2. Compare

Pentax K-S1 Key Features:

  • 20.0 MP APS-C CMOS sensor
  • ISO 100 - 51200
  • Image Stabilization: Yes
  • 3″ Fixed Type Screen
  • ViewFinder: Yes
  • 5.4 fps Continuous Shooting
  • Video: 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps)
  • Built-in Wireless: Yes
  • Dimensions: 121 x 93 x 70 mm
  • Weight: 558 g
  • Environmental Sealing: No
  • Built-in GPS: Yes
  • Replaced by Pentax K-S2. Compare

Fujifilm X-T3 substituted Fujifilm X-T2. Be sure to check out some of our other overviews that may also interest you:
Fujifilm X-T3 vs. X-T2
Fujifilm X-T2 vs. Pentax K-S1

Why is Fujifilm X-T3 a better choice than Pentax K-S1

Bluetooth Yes vs No Connect your camera to other devices via Bluetooth
Timelapse Recording Yes vs No Creative shooting
Storage Slots 2 vs 1 Extra storage slot
Sensor Resolution 26.0 MP vs 20.0 MP 23.1% more pixels
Continuous Shooting 20 fps vs 5.4 fps 14.6 fps faster
Max Shutter Speed 1/8000 vs 1/6000 Faster shutter speed
Number Of Focus Points 425 vs 11 414 more focus points
Screen Size 3.2″ vs 3″ 0.2" larger screen
Screen Resolution 1,040k dots vs 921k dots 11.4% higher resolution screen
Touch Screen Yes vs No Easy control of camera functions
Weight 539 g vs 558 g 19 g lighter
Environmental Sealing Yes vs No Shoot at tough conditions
Max Video Resolution 4096 x 2160 vs 1920 x 1080 Higher Resolution Video
Microphone Port Yes vs No High quality audio recording option
Headphone Port Yes vs No Has headphone port
Viewfinder Magnification 0.75 vs 0.64 0.11 better magnification

What are the key reasons to pick Pentax K-S1 over Fujifilm X-T3

Image Stabilization Yes vs No All lenses are stabilized
Built-In Flash Yes vs No All the lenses are stabilized
Flash Range 10 vs No 10 better flash range
Battery Life 410 shots vs 390 shots 20 more frames with a single charge

Key PROs of Fujifilm X-T3 and Pentax K-S1

Screen Size 3.2″ | 3″ Large display
Viewfinder Electronic | Optical (pentaprism) Better framing and control
Raw Support Yes | Yes Better image quality
AutoFocus Face Detection Yes | Yes Very handy for portraits
Bracketing Yes | Yes Useful for tough lighting conditions and HDR
Flash Sync Port Yes | Yes Port for Flash Sync

Fujifilm X-T3 vs Pentax K-S1: Comparing Two Models By Physical Characteristics

Before heading straight to the technical characteristics of each model, let’s start with comparing their physical specs. Let’s start with looking at the physical difference of the two products. Below are images that clearly show the sizes of Fujifilm X-T3 and Pentax K-S1 from the front view.

Fujifilm X-T3
Pentax K-S1
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Now, let’s go on and see how the reviewed models are different or similar by the top view.

Fujifilm X-T3
Pentax K-S1
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After looking at these images, you should get a clear idea of each model’s dimensions and how they are different from each other. However, we are not going to stop there. The next characteristic worth looking at is the weight. Of course, not every photographer is concerned about the weight, for example, it wouldn't be a decisive point for those who shoot in a studio. However, it is still an important factor because if you happen to go on a long photo session or just love having the camera with you wherever you go, you want to be sure that the chosen model isn't too heavy.

Speaking of weight, Fujifilm X-T3 is a lighter option of these two, as it weights 19g less than the Pentax K-S1. This difference, in fact, can become a significant disadvantage for the photographers, who prefer to have their cameras with them wherever they go.

Comparing Fujifilm X-T3 and Pentax K-S1 by the type of Sensor and Resolution

Sensor is, without a doubt, the most significant element of every digital camera. Its type, size, and resolution are the factors that define the quality of future shots. Thus, it is barely possible to pick a suitable camera without looking at these specs.

Are Fujifilm X-T3 and Pentax K-S1 any different in terms of sensor type?

In fact, that's exactly what makes these two models really different. Thus, it is a good point to consider if your are choosing between these two cameras. Fujifilm X-T3 features a 26.0 MP APS-C sized BSI-CMOS sensor . Pentax K-S1, in its turn, comes with a 20.0 MP APS-C sized CMOS sensor and Prime MII processor , which makes it significantly different from the first model.

Take a look below to find the comparison of Fujifilm X-T3 and Pentax K-S1 by the size of their sensors.

Fujifilm X-T3
Pentax K-S1
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Fujifilm X-T3 and Pentax K-S1 are identical by this indicator, as each feature a sensor of the same size. Thus, both cameras will provide the same level of control in terms of the depth of field if you use them with the same focal length and aperture.

For Which Fields Of Photography Are Fujifilm X-T3 and Pentax K-S1 Suitable?

If you are interested in photography or has made a career in this field, you should know that different types of shooting actually require different camera characteristics. While one model can produce outstanding portraits, at the same time, it can be terrible for shooting landscapes, and so on. Thus, before you purchase a specific camera, it is vital to decide, which type of shooting you do most often and consider an option that suits it the most.

This section of our comparison is devoted to the performance of Fujifilm X-T3 and Pentax K-S1 in different fields of photography. Here we are going to look at the five main areas and evaluate how well each of the reviewed models performs in them. This will help you choose an option that suits your needs the most depending on your interest in one or several of these fields.

Photography Type Fujifilm X-T3 Pentax K-S1
Portrait Photography
95%
86%
Street Photography
78%
86%
Sports Photography
99%
62%
Daily Photography
78%
39%
Landscape Photography
88%
91%

Fujifilm X-T3 for Portrait Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • High resolution sensor (26 MP)
  • Fast Max Shutter Speed (1/8000s)
  • Face Detection Focusing

Disadvantages:

  • No Image Stabilization

Pentax K-S1 for Portrait Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • Image Stabilization
  • Face Detection Focusing

Disadvantages:

No Significant Disadvantages

Fujifilm X-T3 for Street Photography

Advantages:

  • Built-in View Finder
  • Live View
  • Large APS-C(23.5 x 15.6 mm) sensor

Disadvantages:

  • Big size (133 x 93 x 59 mm)
  • No Image Stabilization

Pentax K-S1 for Street Photography

Advantages:

  • Built-in View Finder
  • Live View
  • Image Stabilization
  • Large APS-C(23.5 x 15.6 mm) sensor

Disadvantages:

  • Big size (121 x 93 x 70 mm)
  • Small Number of autofocus Points (11)

Fujifilm X-T3 for Sports Photography

Advantages:

  • Fast Continuous Shooting (20.0 fps)
  • Environmental Sealing
  • Fast Max Shutter Speed (1/8000s)
  • Big Number of autofocus Points (425)

Disadvantages:

  • Bad Max Native ISO (12800)
  • Small battery life (390 shots)

Pentax K-S1 for Sports Photography

Advantages:

No Significant Advantages

Disadvantages:

  • Slow Continuous Shooting (5.4 fps)
  • No Environmental Sealing
  • Slow Max Shutter Speed (1/6000s)
  • Smal Number of autofocus Points (11)
  • Bad Low Light ISO (1061)
  • Small battery life (410 shots)

Fujifilm X-T3 for Daily Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • Built-in View Finder
  • Live View
  • Wireless Connectivity
  • Video is available

Disadvantages:

  • Big weight (539 g)
  • Big size (133 x 93 x 59 mm)
  • No Built-in Flash

Pentax K-S1 for Daily Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • Built-in Flash
  • Built-in View Finder
  • Live View
  • Wireless Connectivity
  • Video is available

Disadvantages:

  • Big weight (558 g)
  • Big size (121 x 93 x 70 mm)

Fujifilm X-T3 for Landscape Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • High resolution sensor (26 MP)
  • Environmental Sealing
  • Live View
  • RAW Support

Disadvantages:

  • Bad Max Native ISO (12800)

Pentax K-S1 for Landscape Photography

Advantages:

  • Large APS-C (23.5 x 15.6 mm) sensor
  • Good Dynamic Range (13.0)
  • Live View
  • RAW Support

Disadvantages:

  • Low resolution sensor (20 MP)
  • No Environmental Sealing
  • Bad Low Light ISO (1061)

Comparison of Fujifilm X-T3 vs Pentax K-S1: Final Verdict

Hopefully, our detailed overview of these models has helped you consider all the main specs, pros and cons of each cameras. Maybe, after reading this comparison, some of you have already decided which option to opt for depending on your needs and preferences. However, if you are still wondering which option is a better choice, Fujifilm X-T3 or Pentax K-S1, below you can see what scores each of them received in five different aspects. To wrap up, we have used our unique Decision Algorithm that assesses different camera models upon 63 different factors including their price, and, if possible, DxO Mark scores. This algorithm allows us to make our verdict more consistent and objective.

What is our final verdict? Based on our comparison and the final scores of Fujifilm X-T3 and Pentax K-S1 here is what we can say in conclusion:

According all the factors that we considered in the process of comparing these two cameras, Fujifilm X-T3 deserves a higher Total Score than the Pentax K-S1. Thus, if you are choosing between these options, we would recommend you to choose the first model over the other one.

Fujifilm X-T3 vs Pentax K-S1 Table Of Technical Specs

For better understanding of each model’s technical characteristics, find the detailed comparison below:

Fujifilm X-T3 Pentax K-S1
General
Brand Fujifilm Pentax
Model X-T3 K-S1
Announced Sep 06, 2018 Aug 27, 2014
Body Type SLR-style mirrorless Mid-size SLR
Sensor
Sensor Type BSI-CMOS CMOS
Sensor Size APS-C APS-C
Sensor Dimensions 23.5 x 15.6 mm 23.5 x 15.6 mm
Sensor Area 366.60 mm2 366.60 mm2
Sensor Resolution 26.0 MP 20.0 MP
Max Image Resolution 6240 x 4160 5472 x 3648
Max Native ISO 12,800 51,200
Max Boosted ISO 51,200 n/a
Min Native ISO 160 100
RAW Support Yes Yes
Lens
Manual Focus Yes Yes
Lens Mount Fujifilm X Pentax KAF2
Number of Lenses 43 144
Focal Length Multiplier 1.5x 1.5x
Macro Focus Range
AutoFocus
AF Touch Yes No
AF Continuous Yes Yes
AF Single Yes Yes
AF Tracking Yes Yes
AF Selective Yes Yes
AF Center Yes Yes
AF Multi Area Yes Yes
AF Live View Yes Yes
AF Face Detection Yes Yes
AF Contrast Detection Yes Yes
AF Phase Detection Yes Yes
Number of Focus Points 425 11
Number of Cross Focus Points n/a n/a
Screen
Screen Type Tilting Fixed Type
Screen Size 3.2″ 3″
Screen Resolution 1,040k dots 921k dots
Live View Yes Yes
Touch Screen Yes No
ViewFinder
ViewFinder Electronic Optical (pentaprism)
ViewFinder Resolution 3,690k dots 0k dots
ViewFinder Coverage 100% 100%
ViewFinder Magnification 0.75 0.64
Photography Features
Min Shutter Speed 30 s 30 s
Max Shutter Speed 1/8000 s 1/6000 s
Continuous Shooting 20.0 fps 5.4 fps
Shutter Priority Yes Yes
Aperture Priority Yes Yes
Manual Exposure Mode Yes Yes
Exposure Compensation Yes Yes
Custom White Balance Yes Yes
Image Stabilization No Yes
Built-in Flash No Yes
Flash Range 0 10
Flash Modes no built-in flash Auto, auto + redeye, on + redeye reduction, slow sync, trailing curtain sync, manual
External Flash Yes Yes
AE Bracketing Yes Yes
WB Bracketing Yes Yes
Exposure Modes
Multi-Segment Yes Yes
Average Yes No
Spot Yes Yes
Partial No No
AF-Area No No
Center Weighted No Yes
Video Features
Video Resolutions 4096x2160 (60p/50p/30p/25p/24p/23.98p) 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps)
Max Video Resolution 4096 x 2160 1920 x 1080
Video Formats MPEG-4, H.264, H.265 H.264
Microphone Port Yes No
Headphone Port Yes No
Connectivity
Wireless Connectivity Yes Yes
HDMI Yes Yes
USB USB 3.0 USB 2.0
Physical
Environmental Sealing Yes No
Water Proof No No
Dust Proof No No
Shock Proof No No
Crush Proof No No
Freeze Proof No No
Weight 539 g 558 g
Physical Dimensions 133 x 93 x 59 mm 121 x 93 x 70 mm
Battery Life 390 shots 410 shots
Battery Type Battery Pack Battery Pack
Battery Model n/a D-LI109
Other Features
Self Timer Yes Yes
Timelapse Recording Yes No
GPS Optional
Storage Type n/a SD/SDHC/SDXC
Storage Slots 2 1

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