Quote Originally Posted by tkamiya View Post
I can't do wide angle trick. It will mess up my composition. Foreground/background proportions are very important in this image.
But proportions in an image don't change with a changed angle of view. Relative size of objects in the frame only change when the camera to subject distance is changed. As long as you maintain the position from which you have determined your ideal composition, then you can indeed use a wide angle lens and enlarge the desired part of the negative, thus increasing the grain. The relative sizes of the foreground/background will remain the same.