>>2890754Lots of SLRs in photojournalism, especially in places that are less than comfy like warzones. Very reliable in a way most rangefinder aren't, you won't bump a mirror or focusing screen out of sync like you can with a rangefinder alignment. I love and use both, but there are definitely pros and cons on both sides.
Don McCullin used Olys, and famously Nikons. Pic related his Nikon F literally stopped a bullet, SLRs are cool. He explains it a bit in link below, fascinating bloke and an unbelievable photographer.
http://petapixel.com/2012/11/03/war-photographer-don-mccullin-reflects-on-a-career-filled-with-haunting-images/ 