Well the absolute best way would be to use a multicamera system (such as a microsoft ultra cam or a LeadAir MIDAS system) mounted on the airframe, however these are very expensive and are geared towards aerial survey companies. Pros are that you will get 100% coverage based on the setup of the system meaning there is less you have to think about in flight. Also very large sensors mean high res images for high res models. The cons are basically the price and the fact that they are mounted directly on the aircraft so you need an aircraft you can mount one to. Moving down on the spectrum of price and quality, there are medium format cameras (hasselblad or phase one). Ive never used a medium format camera but I have heard that their handling can be clunky which might make them not the best for aerial photography. The pros though are that they have very large, high resolution sensors. The cheapest line of cameras I would recommend for aerial capture would be the Nikon's, Sony's, Canon's etc full frame high res DSLR's. I created this model using a Nikon D810 w/ 70mm f/2.8 lens out of a Cessna and it worked pretty well. They are, comparatively, very cheap, easy to use, and modern full frame DSLR's keep getting higher and higher resolution sensors.
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