How do they do that?Focus is a critical element in any photograph. Have you ever noticed a picturewhere everything seems to be in focus from the foreground to the horizon? Thetrick is to use "hyperfocus." The September 1996  issue of "Popular Photography" givesthis explanation: "Simply put, the hyperfocal distance is the focusing point atwhich the lens must be set to provide the maximum depth of field at anyaperture." (page 64).Hyperfocal scales once were printed on lens barrels but those helps are raretoday. You could use a hyperfocal depth chart or remember the mathmaticalequation ("...square the focal length, take four percent of this figure anddivide the result by the f-stop") or use your Newton and Hyperfocus Calculator.Simply fill in the lens focal length and the f-stop. The calculator will tellwhere to focus your lens and it will also tell you how much of your sceneshould be in focus.For example, if you are using a 50 mm lens at f-11, the calculator will tellyou to focus on a point 30 feet away. Everything from 15 feet to infinity should bein focus. The calculator will also allow you to play with the variables. If youstop down from f-11 to f-22 the calculator will tell you to focus 15 feet awayand you should have everything from 7.5 feet to infinity in focus.The Hyperfocus Calculator has been tested on the original Message Pads. Pleasesend "Bug Reports", suggestions and comments to JohnMcKeel@aol.com. Note: Thiscalculator only works with 35 mm cameras and since this program is "freeware"the usual disclaimers apply. You are on your own but I'd love to hear from you.I'm working on a number of photographic applications for the Newton. If youwould like to be notified, please contact me. If you would like a version ofthis program for medium and large format cameras, please send your camera to me<GRIN>.Thanks to Ken Williams, Herbert Keppler and Popular Photography magazine.