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The SMC Pentax-DA 18-55mm f/3.5-5.6 AL lens is a standard zoom lens for the Pentax K-mount. It is often sold as a kit lens with Pentax digital SLR cameras and has a 35mm equivalent focal length of 27-82.5mm. Its optical formula is made of 12 elements in 9 groups. There are two variants of this lens: *SMC Pentax-DA 18-55mm 1:3.5-5.6 AL (first version of 18-55; LensType=252) *Samsung D-XENON 18-55mm 1:3.5-5.6 AL (Schneider Kreuznach branded variant; supplied with Samsung GX-series DSLRs; LensType=246) A new optical formula (11 elements in 8 groups) was introduced in 2008 and exists in five variants: *SMC Pentax-DA 18-55mm 1:3.5-5.6 AL II (revised version with greater sharpness; LensType=229) *Samsung D-XENON 18-55mm 1:3.5-5.6 AL II (Schneider Kreuznach branded variant of revised 18-55; LensType=223) *SMC Pentax-DA L 18-55mm 1:3.5-5.6 AL (lightweight variant with plastic mount; LensType=222) *SMC Pentax-DA 18-55mm 1:3.5-5.6 AL WR (weather-resistant variant; LensType=218) *SMC Pentax-DA L 18-55mm 1:3.5-5.6 AL WR (weather-resistant but with lighter build with plastic mount; introduced with K-50; LensType=202) All lenses except the DA L variants provide the Quick-Shift Focus System, providing full-time manual focus while in autofocus mode. The DA L variants also lack a distance scale and are sold without a hood. The hood for non-WR variants is PH-RBA52 while the hood for WR variants is PH-RBC52 == External links == *(SMC Pentax-DA 18-55mm f/3.5-5.6 AL II ) *(SMC Pentax-DA 18-55mm f/3.5-5.6 AL WR ) *(Bojidar Dimitrov's Pentax K-Mount Page: DA 18-55/3.5-5.6 AL ) *(Bojidar Dimitrov's Pentax K-Mount Page: DA 18-55/3.5-5.6 AL II ) *(Bojidar Dimitrov's Pentax K-Mount Page: DA L 18-55/3.5-5.6 AL ) *(Bojidar Dimitrov's Pentax K-Mount Page: DA 18-55/3.5-5.6 AL WR ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pentax DA 18-55mm lens」の詳細全文を読む スポンサード リンク
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