Digital Rebel (300D) macro range with EF-S 18-55mm lens

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$Canon EF-S 18-55mm lens (No extension tube)\nMax magnification - Min distance\nSubject distance from end of lens : 115mm$ $Modified 12mm Kenko extension tube with Canon EF-S 18-55mm lens\nMax magnification - Min distance\nSubject distance from end of lens : 60mm$ $Modified 12+20mm Kenko extension tube with Canon EF-S 18-55mm lens\nMax magnification - Min distance\nSubject distance from end of lens : 35mm$ $Modified 12+36mm Kenko extension tube with Canon EF-S 18-55mm lens\nMax magnification - Min distance\nSubject distance from end of lens : 20mm$ $Modified 12mm Kenko extension tube with Canon EF-S 18-55mm lens\nMin magnification - Max distance\nSubject distance from end of lens : 290mm$ $Modified 12+20mm Kenko extension tube with Canon EF-S 18-55mm lens\nMin magnification - Max distance\nSubject distance from end of lens : 110mm$ $Modified 12+36mm Kenko extension tube with Canon EF-S 18-55mm lens\nMin magnification - Max distance\nSubject distance from end of lens : 75mm$