The design of this camera is a cross between a Korona and Flomer & Schwing. The extension without the rail is 28". I have not cut the slots for the rack & pinion yet. Doing some finish work on the front base as we speak. I decided to have Matt help me with the design and construction and he has a great Shopsmith that we are using. I wanted the joints perfect on this camera as it is HUGE! I have 9x9 lens boards for it. I'm going to take it out in the field to shoot with and use it in the studio. As far as film goes..... I have been shooting x-ray film for some time now and now how to use it to get the results I want. $90.00 for a box of 100 sheets! Do the math, it is a no brainier as to film.