I have just moved into 5x4 from medium format and have a question regarding the amount of tilt to be used when focusing in order to gain the maximum DOF. I spend most of my time photographing landscapes and seascapes and would like to get maximum sharpness from the nearest foreground to the background.

Example: 5x4 camera with Rodenstock Grandigon 90mm lens. I am taking a photo of a rocky beach with plenty of small boulders to use as foreground interest starting from approx 6 feet from the camera, and the soaring cliffs further along the beach as my background.

Question: Approx how much front tilt would I need to use to get to alter the focus plain and get sufficient DOF to capture the entire scene with sufficient sharpness? I would be normally shooting between f22 and f32.

I appreciate that there are no exact answers to this question but would like to get a rough starting point from which to work from.

Many thanks, Mark