Thankyou all for the input on ground glass Guillermo-
The reason for the ground glass is so that I can view the scene for composition before exposure. I don't require a necessarily good image, just one for the main lines and masses of the picture. Your idea of a fresnel sheet is inspired, I shall use it. I know that pinhole is also about serendipity but I want a little more control over the final image, particularly when one has taken time to find and there is no retake! I am going to use a viewing pinhole for the ground glass - one that gives me enough light (under a cloth) so I can see the image. I am not concerned with viewing detail just the main masses. Alexis
