Stone- My post is based on years of experience, traveling long distances to take photographs. I spend the month of June, almost every year, on a small Caribbean island, shooting for clients. They're villa/boutique hotel owners who hang my work in the villas/hotels. I can't experiment while there. I have to be familiar with my materials and equipment. I just picked up a 4x5 lens for this year's trip. Between now and June, I'll shoot at least 40-50 sheets with it, so I know it before leaving. I've also been thinking about picking up a 6x9 rangefinder, or a pano camera before this trip. If I do, they won't make the trip unless I put at least a dozen rolls through them prior to leaving.