I would like to make a pinhole camera that uses 4x5 filmholders. Not ever havin g seen the inside of a large format camera, I'm not sure how to make the film-ho lder/camera-back interface light tight.
Presumably the film-holder should be pressed tightly up against the back of the camera. Is this pressure normally achieved by means of leaf springs?
Presumably the user slides the film-holder into and out of the back of the camer a at right angles to the axis of the lens, rather than moving it along the axis towards the lens.
What methods are commonly used to prevent light from leaking around the four sid es of the film-holder and fogging the film? Particularly from the top, where mo st ambient light will be coming from, and which must be open to allow access to the dark slide.
Any advice that you can offer would be very welcome. Thank you.