The ETRS is an improved version of the ETR. The main improvement is the interchangeable viewfinder system. The newer AE II and III finders are not fully compatible with the older ETR cameras, because there is a new electronic connector pin. The shutter button lock has been redesigned. It has three settings, unlocked, shutter release button lock but drive and cable release unlocked, and all locked.
Fuji medium-format 6 x 17cm panoramic. Old model with Fujinon 105mm f1.8 fixed lens.
Hasselblad camera has gained a reputation over the years for its robustness, mechanical accuracy and for having a wide range of high-quality lenses, making it the medium-format camera of choice for generations of professional photographers. Victor Hasselblad AB reinforced this reputation by making the most of the fact that their camera had been chosen by NASA for use in space, although not without modifications.