Mirrors and Lenses291From the thin lens equation, ( )111111 115.0 cm15.0 cmqqfpqfq==−−When 115.1 cmq=+( )5.00d=(cm311.8210p=×, then When cm18.2 m=145.3 cmq)10d=.0 cm122.4 cmp, then 0.224 m==Thus, the range of focal distances for this camera is 0.224 m to 18.2 m 23.46Consider an object Oat distance in front of the first lens. The thin lens equation gives the image position for this lens as 11p111qfp=−11q. ±±²²±²³±³³²³´³²±³´±³´³µµ²´²µ±The image, I, formed by the first lens serves as the object, O, for the second lens. With the lenses in contact, this will be a virtual object if is real and will be a real object if is virtual. In either case, if the thicknesses of the lenses may be ignored,
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Photographic lens, Thin lens, 5.00 cm, 10 3 cm