Fujifilm X-S20 vs Pentax K10D

In this comparison, we will evaluate the Fujifilm X-S20 and the Pentax K10D, highlighting the advantages of each over the other, discussing their pros and cons, shared strengths and weaknesses, and providing a rating based on their available features and specifications to assist you in choosing the one that best suits your needs.

Fujifilm X-S20 was introduced in May 2023 and Pentax K10D was introduced in December 2006. Let us first list highlights of the models.

Now that we've looked at the most essential specifications and gained a basic understanding of these cameras, we can delve into more details and see the differences between them.

This section shows those features and specifications which are the reason to choose Fujifilm X-S20 over Pentax K10D.

This section shows those features and specifications which are the reason to choose Pentax K10D over Fujifilm X-S20.

We already listed pros and cons of each model. However, you may also find useful to look at their common strengths and weaknesses shown side-by-side.

Screen

Fujifilm X-S20 has a 3.0" Fully Articulated screen with 1,840k dot resolution and Pentax K10D has a 2.5" Fixed screen with 210k dot resolution. Fully articulated screen makes Fujifilm X-S20 selfie and vlogger friendly and generally very useful for video shooting. Fujifilm X-S20 also features touchscreen which has advantages such as easy menu navigation, intuitive controls, quick setting adjustment and most importantly a Touch-to-Focus functionality allowing users to select a specific point on the screen where they want the camera to focus. This feature can be helpful for achieving precise focus in both photo and video recording.

Viewfinder

Fujifilm X-S20 has a built-in 0.39" Electronic (OLED) viewfinder with 2,360k dot resolution and Pentax K10D has a built-in Optical (pentaprism) viewfinder. Fujifilm X-S20 has 100% coverage with 0.93x (0.62x 35mm equivalent) magnification and Pentax K10D has 95% coverage with 0.95x (0.63x 35mm equivalent) magnification.

Fujifilm X-S20 features a 26.1 megapixel APS-C BSI-CMOS sensor with dimensions of 23.5 x 15.6 mm and a total area of 366.6 mm². Its native ISO range is 160 - 12,800 and expands to 80 - 51,200 in boosted mode. Pentax K10D features a 10.2 megapixel APS-C CCD sensor with dimensions of 23.5 x 15.7 mm and a total area of 246.5 mm². Its native ISO range is 100 - 1,600.

Fujifilm X-S20 has BSI-CMOS sensor, short for Backside Illuminated Complementary Metal-Oxide-Semiconductor sensor. In traditional CMOS sensors, the wiring and circuitry are located on the front side of the sensor, which can block some of the incoming light. BSI technology flips this design by placing the photosensitive elements (pixels) on the backside of the sensor, allowing more light to reach the pixels. This significantly enhances light sensitivity and improves low-light performance. BSI-CMOS sensors are particularly effective in low-light conditions, as they can capture more light, resulting in brighter and less noisy images. This makes them well-suited for indoor and night photography. BSI-CMOS sensors deliver a higher SNR and reduced cross-talk.

Here is a sensor size comparison chart where you can see how different sensors compare with each other:

Sensor size chart

	Sensor	Dimensions	Area	Aspect Ratio	Crop Factor
	Medium Format	44 x 33 mm	1452 mm2	4:3	0.79x
	Full Frame	36 x 24 mm	864 mm2	3:2	1x
	APS-H	27 x 18 mm	486 mm2	3:2	1.3x
	APS-C	23.6 x 15.6 mm	368.2 mm2	3:2	1.5x
	APS-C (Canon)	22.3 x 14.9 mm	332.3 mm2	3:2	1.6x
	Micro Four Thirds	17.4 x 13 mm	226.2 mm2	4:3	2x
	1-inch	13.2 x 8.8 mm	116.2 mm2	3:2	2.7x
	1/1.7-inch	7.44 x 5.58 mm	41.5 mm2	4:3	4.7x
	1/2.3-inch	6.17 x 4.55 mm	28.1 mm2	4:3	5.6x

Fujifilm X-S20 is equipped with X-Processor 5 processor and can take pictures up to 6240 x 4160 resolution. Pentax K10D can take pictures up to 3872 x 2592 resolution. It can also take pictures with lower resolution like 3008 x 2000, 1824 x 1216 with 3:2 aspect ratios.

Lens Mount

Fujifilm X-S20 has Fujifilm X lens mount and Pentax K10D has Pentax K_AF2 lens mount. Due to their APS-C sensor their crop factor (also called lens multiplier) is equal to 1.5x. This means that a 35mm equivalent focal length of the mounted lens will be equal to its actual focal length times 1.5.

No Low-Pass Filter on Fujifilm X-S20

There is no optical low-pass filter (OLPF), also known as an anti-aliasing filter, in front of the sensor on Fujifilm X-S20. This results in a slightly sharper image but may also introduce moiré patterns and aliasing artifacts when photographing subjects with fine, repetitive patterns or details.

In-Body Image Stabilization

The cameras have a built-in in-body image stabilization (IBIS) (7 stops of compensation in Fujifilm X-S20). This means that you are still getting vibration reduction when cameras are paired with non-image stabilizied lenses. It also works with lenses with optical image stabilization and in combination can achieve even better compensation.

Built-in Wi-Fi on Fujifilm X-S20

Fujifilm X-S20 has a built-in Wi-Fi (Wi-Fi 5, 802.11ac/b/g/n, 2.4/5 GHz) which allows to easily transfer photos and videos from the camera to other Wi-Fi-enabled devices, such as smartphones, tablets, printers, or computers. This eliminates the need for cables and allows for quick and convenient media sharing and social media integration. It gives you the ability to control your camera remotely using a smartphone or tablet. This is particularly useful for taking self-portraits, group shots, or capturing images in challenging conditions without having to touch the camera. Firmware updates can also be downloaded and installed wirelessly.
  Check out the cameras in our database that have built-in WiFi.

Bluetooth on Fujifilm X-S20

Fujifilm X-S20 has a built-in Bluetooth (version 4.2 LE) which lets you to connect the camera to a smartphone or a dedicated remote control device. This allows you to remotely trigger the camera, adjust settings and controls remotely through a paired mobile app. While Wi-Fi is generally faster for transferring larger files, Bluetooth can be used for small, selective transfers, it can provide real-time information about your camera's battery status, memory card capacity, and other key settings directly on your paired smartphone or smartwatch.
  Check out the cameras in our database that have built-in Bluetooth.

USB Inputs and HDMI Outputs

Both models have USB inputs for data transfer. connector for video signal output.

Battery

Fujifilm X-S20 comes with NP-W235 battery pack with battery life of 750 shots.

External Storage Slots

Fujifilm X-S20 has a single SD/SDHC/SDXC (UHS-I) [2 TB Maximum] card slot. Pentax K10D has a single SD/SDHC card slot.

Shutter

Fujifilm X-S20 has Electronic shutter and Mechanical Focal Plane shutter. Pentax K10D has Electronically controlled Vertical Run Focal Plane shutter. Shutter speed can go up to 1/32000 sec with electronic shutter and up to 1/4000 sec with mechanical shutter on Fujifilm X-S20, and up to 1/4000 sec on Pentax K10D. Fujifilm X-S20 can shoot continuously up to 20.0 fps with electronic shutter and up to 8.0 fps with mechanical shutter. Pentax K10D can shoot continuously up to 3.0 fps.

Focusing

Fujifilm X-S20 has Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF) system with 425 focusing points and Pentax K10D has 11 focusing points..

Flash

Cameras have built-in flash with maximum range of 7.00 m at ISO 200 on Fujifilm X-S20. They also accept external flash which can be connected via Hot Shoe or Proprietary to Fujifilm X-S20 and via Hot Shoe to Pentax K10D. The fastest flash synchronization speed is 1/180 sec on both cameras.

Fujifilm X-S20 body has dimensions of 127 x 85 x 65 mm (5 x 3.35 x 2.56") and Pentax K10D body has dimensions of 142 x 101 x 70 mm (5.59 x 3.98 x 2.76"). Fujifilm X-S20 weighs 491 g (1.08 lb / 17.32 oz) and Pentax K10D weighs 793 g (1.75 lb / 27.97 oz).

Fujifilm X-S20

Pentax K10D

127 mm

85 mm

142 mm

101 mm

85 mm

101 mm

65 mm

70 mm