I picked the 60 MP back because of the large sensor size (53mm x 40mm), which is about 1.5 times the surface area of many typical MF sensors (44 x 33mm). In fact, this sensor is about 2.5 times the size of a full frame camera (36mm x 24mm). The back has 694 actuations, with an estimated usage of 17 hours.The back comes with 4 batteries, charger, tether cable, white card and original sensor cleaning cloths. Also included are 5 memory cards (1 x 64 GB, 4x 32 GB) and case. I have thrown in also a visible dust sensor cleaning kit (new, unopened condition - I never needed to use it). In the summer of 2015 the back developed a fault and would not respond.
I have had no problems at all since the electronics were replaced. The Capture Integration tech said it was like getting a new back. It had 40 actuations when they sent it back to me in November 2015. You can confirm that with a Phase One dealer, such as Capture Integration. The item "Leaf Credo 60 MP Medium Format Digital Back w / extras" is in sale since Thursday, February 15, 2018.This item is in the category "Cameras & Photo\Film Photography\Digital Camera Backs". The seller is "wswatsonjr" and is located in Boulder, Colorado. This item can be shipped to United States.