The Air Force used Koni Rapid, 100 and 200 with 3 lens, normal, wide and the 180. I only shot with it a few times, found it be easy to use, lens are of course excellent. The weak point will be the rachet film advance that cocks the shutter. There were guys who held on to the handle and advanced the shutter by plunging the body up and down with one hand and arm. I bought a Mamiya Universal as I thought the film advance would not have taken the same abuse as a working pro's Konica. The Air Force replaced the Graflex XL with the Konica Rapid as the Graflex XL did not hold up to daily use. The Graflex XL had the best range of lens, from a very wide to a 250 maybe 280 tele.