Fujifilm GFX 100S vs Pentax K-7

In this comparison, we will evaluate the Fujifilm GFX 100S and the Pentax K-7, 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 GFX 100S was introduced in January 2021 and Pentax K-7 was introduced in October 2009. 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 GFX 100S over Pentax K-7.

This section shows those features and specifications which are the reason to choose Pentax K-7 over Fujifilm GFX 100S.

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 GFX 100S has a 3.2" Tilting screen with 2,360k dot resolution and Pentax K-7 has a 3.0" Fixed screen with 921k dot resolution. Tilting screen makes Fujifilm GFX 100S very useful for photography purposes but not so useful for video shooting. Fujifilm GFX 100S 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 GFX 100S has a built-in 0.5" Electronic (OLED) viewfinder with 3,690k dot resolution and Pentax K-7 has a built-in Optical (pentaprism) viewfinder. They both have 100% coverage.

Fujifilm GFX 100S features a 102 megapixel Medium format BSI-CMOS sensor with dimensions of 43.8 x 32.9 mm and a total area of 1441 mm². Its native ISO range is 100 - 12,800 and expands to 50 - 102,400 in boosted mode. Pentax K-7 features a 15 megapixel APS-C CMOS sensor with dimensions of 23.4 x 15.6 mm and a total area of 243.4 mm². Its native ISO range is 100 - 2,000 and expands to 100 - 6,400 in boosted mode.

Fujifilm GFX 100S 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 GFX 100S is equipped with X-Processor 4 processor and can take pictures up to 11648 x 8736 resolution. Pentax K-7 is equipped with PRIME II processor and can take pictures up to 4672 x 3104 resolution. It can also take pictures with lower resolution like 3936 x 2592, 3072 x 2048, 1728 x 1152 with 3:2 aspect ratios.

Lens Mount

Fujifilm GFX 100S has Fujifilm G lens mount and Pentax K-7 has Pentax K_AF2 lens mount. Due to Medium format sensor in Fujifilm GFX 100S its crop factor is equal to 0.79x, this means that a 35mm equivalent focal length of the mounted lens will be equal to its actual focal length times 0.79. Due to APS-C sensor in Pentax K-7 its crop factor 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.

In-Body Image Stabilization

The cameras have a built-in in-body image stabilization (IBIS) (6 stops of compensation in Fujifilm GFX 100S). 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 GFX 100S

Fujifilm GFX 100S has a built-in Wi-Fi (802.11b/g/n, 2.4 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 GFX 100S

Fujifilm GFX 100S 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. Fujifilm GFX 100S has a Micro HDMI and Pentax K-7 has an HDMI connector for video signal output.

Battery

Fujifilm GFX 100S comes with NP-W235 battery pack with battery life of 460 shots and Pentax K-7 comes with D-LI90 battery pack with battery life of 980 shots.

External Storage Slots

Fujifilm GFX 100S has Dual SD/SDHC/SDXC (UHS-II) card slots. Pentax K-7 has a single SD/SDHC card slot.

Shutter

Fujifilm GFX 100S has Electronic shutter and Mechanical Focal Plane shutter. Shutter speed can go up to 1/16000 sec with electronic shutter and up to 1/4000 sec with mechanical shutter on Fujifilm GFX 100S, and up to 1/8000 sec on Pentax K-7. Fujifilm GFX 100S can shoot continuously up to 5.0 fps. Pentax K-7 can shoot continuously up to 5.2 fps.

Focusing

Fujifilm GFX 100S has Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF) system with 425 focusing points and Pentax K-7 has 11 focusing points..

Flash

Pentax K-7 has a built-in flash with maximum range of 13.00 m and also accepts external flash which can be connected via Hot Shoe or PC Terminal. Fujifilm GFX 100S has no built-in flash but an external flash may be connected via Hot Shoe or PC Terminal. The fastest flash synchronization speed is 1/250 sec on Fujifilm GFX 100S and 1/180 sec on Pentax K-7.

Fujifilm GFX 100S body has dimensions of 150 x 104 x 87 mm (5.91 x 4.09 x 3.43") and Pentax K-7 body has dimensions of 131 x 97 x 73 mm (5.16 x 3.82 x 2.87"). Fujifilm GFX 100S weighs 900 g (1.98 lb / 31.75 oz) and Pentax K-7 weighs 750 g (1.65 lb / 26.46 oz).

Fujifilm GFX 100S

Pentax K-7

150 mm

104 mm

131 mm

97 mm

104 mm

97 mm

87 mm

73 mm