Their operating profits and thus margins on the imaging products were the highest - ~ 65% in 2013-14 but ever decreasing to 58% for 2014-15 and expected to drop down to 38% for 2015-16, with the revenues down by 10% and profits by 33%.
In the precision equipment (lithography and so on) and instruments (microscopes, etc), the margins are very slim but the total sales are growing.
It's pretty clear that the imaging is their cash cow and, while the company is smartly diversifying, they could find themselves in a situation where the cameras and lens profits can no longer support other branches.
As a side note, prior to the onset of digital age, film cameras sold around 4-4.5 million units annually combined. The peak of digital sales, discounting smart phones, was in 2012 with ~ 115 million total units shipped, including about 15 million interchangeable lens models.