Hi, i asked a question simialr to this a little while back, but i dont think i put it accross correctly, either way i still don`t really understand it. In the book "Understanding Exposure" the author goes on about prefocusing the scene via the distance setting, when taking photos at small apettures , f/22 for example. To quote the book: "With my camera on a tripod, i set my aperture to f/22. I then prefocused the scene via the distance setting and adjusted my shutter speed for the light reflecting off the blue sky until 1/60 sec. indicated a correct exposure. The scene didnt look in focus when i shot it, but due to my aperture choice it was rendered sharp on film" Now i understand the whole f/22 = large depth of field. Its purely the prefocusing via the distance setting i just cant grasp. Anybody understand this and can explain? Sorry for large post.