Solution for anamorphic camera

I want to build a anamorphic pinhole camera. I use a 2,2 inches high 2,4 inches diameter cylinder as a darkroom of this camera. And I use 6 cm x 17 cm film. I put the film inside the cylinder parellel and rolled inside the cylinder. I use a pinhole at the top of the darkroom. Pinhole creates a cone shaped image on to the film roll and this takes 360 degrees picture. Problem , you cant know what u are taking without develop the film , I mean I need a viewfinder. And I want to take pictures digitally. Problem : f is 250 and u need a very slowly scanning array and a digital information recorder. I have no laptop and there is no small array scanner and small digital recorder. What is the solution ? A low res camera or phototransistor and a mp3 player or mobil ram circuit which records the flying spot scanner data or what is your realistic solution ?