Large APS-C (23.7 x 15.7 mm) sensor Large sensor in Pentax K-01 ensures a good low light image quality compared to smaller sensor, and it also provide shallow depth of field and a nice blurry background when needed.
Medium size Body With relatively smaller body compared to DSLRs and better ergonomics compared to Compacts,Pentax K-01is a good compromise between size and functionality.
561g Carrying this weight all day may not be very comfortable for you.
Body Thickness 58mm With a thickness of 58mm,Pentax K-01 is not a pocketable camera for sure.