Sony α37

The Sony α37 (Sony Alpha SLT-37) of the year 2012 is a fine camera sample of the short Age of Sony's SLT cameras, an alternate DSLR camera conception which marked the company's move toward digital system cameras with electronical viewfinder in 2010, the year when the renowned popular Japanese electronics maker also introduced its last classic DSLRs with optical reflex viewfinders which were made from 2006 to 2010 in the tradition of Konica Minolta's digital single lens reflex cameras. With the SLTs Sony seemed to found its own digital SLR tradition with a fixed translucent mirror instead of a common flip-up glass mirror, preceeded only singularly by a similar pellicle in the analogue SLR Canon Pellix. The lens bayonet that Sony used for all its DSLRs and SLTs was already known from Minolta's first autofocus SLR system, the first of such popular AF camera systems in the market. Thus the optically remarkable old Minolta  lenses can be used even on Sony's SLT bodies. The SLT concept was ideal for the cameras' video mode since part of the in-coming light was directed to a fast phase detection autofocus sensor. Only 70% of the in-coming light straightly reached the imaging sensor. Thus he SLTs had a slight disadvantage concerning light sensitivity. Thus Sony's internal concurrent project, a completely mirror-less system with new bayonet type was built up parallely to the development of the SLT cameras under the name Sony NEX - both systems marketed as Sony α system. Finally the Minolta-bayonet-based system was ceased in 2016 while the NEXes' E-mount lives on in todays' Sony α camera bodies.