>>3787866>>3787870From
https://pentaxofficial.com/en/6628/>We decided to prioritize the development of a compact, sturdy body because it was one of the new camera’s most important design themes. We were able to reduce the depth of the camera between the lens mount and the LCD screen by optimizing the circuit board layout and downsizing the LCD components.>[…] We considered other options: a tilt-type monitor with one-way tilt action featured in the PENTAX KP; and the vari-angle monitor featured in the PENTAX K-70. These options, however, also would require an increased body depth. Reducing the body depth could also impact the strength of moving components.>At PENTAX, we prioritize viewfinder shooting, so we pay the utmost attention to the appearance of the viewfinder image, and to the camera’s image-tracking performance. Since a reduced body depth makes for a greater protrusion of the viewfinder eyepiece — which provides the benefit of keeping the photographer’s nose from coming in contact with the LCD monitor — it can make viewfinder shooting more comfortable.>In addition, incorporating an angle-adjustable screen in a compact body often makes it difficult to increase the size of the LCD monitor. That’s why PENTAX decided to equip this new camera with a fixed-type 3.2-inch monitor. This was a decision based on our goal of allowing the photographer to confirm the image’s quality and composition on a larger screen at the shooting location, while still keeping with the basic design concept of a compact, sturdy body.All the articles seem interesting btw.
http://www.ricoh-imaging.co.jp/english/explore/new_aps-c_dslr/The Vol. 1 is about their new pentaprism and viewfinder.