>>2869694The QS-1 sensor size is 1/1.7 inch (7.6mm x 5.7mm), or a 4.7 crop, as compared to the "standard" reference "Full Frame" sensor being 35mm (35.8mm x 23.9mm), usually considered a 1:1, the lens was made for a Pentax 6x7 medium format camera, with a "sensor" (film size) of 54x70mm, so a "crop factor" of 1.5 as compared to the 35mm standard
Of course "crop factor" is just a simplified method of explaining "Field of View"
So the QS-1, using a 55mm medium format lens as the same FoV as a 35mm (full frame) camera using a 387.75 lens
I have a Pentax 6x7 and most of the lenses, so I got a few adapters and use them with my Q, also use them on an a7, an a6000 and a G7, just having a good time using a lot of old lenses on a bunch of modern sensors
Non professional photographer, I just enjoy photography, if I didn't have fun I would move on to something else, get a lot of comments about the setup, guys want to know about the lenses, women think the camera is cute, my dog would just prefer we kept walking and ,y wife is glad my retirement keeps me out of her house