User manual TAMRON 18-270 VC

[. . . ] AF18-270mm F/3. 5-6. 3 Di LD Aspherical [IF] MACRO [Equivalent to 28- 419mm*] * When converted to full-size format. VC new The Ultimate All-In-One Zoom: Longest, Steadiest Lens On Earth Di * In the category of photographic lenses designed exclusively for digital SLR cameras with smaller-size image; researched by Tamron, Aug. [. . . ] The VC mechanism exhibits its camera-shake compensation performance to the maximum extent at dusk, in dimly-lit indoor situations, or in hand-held shooting at the ultra-telephoto settings. VC (Vibration Compensation) Unit Structure VC actuator Steel balls Magnet and yoke Gyro sensor for detecting pitching Control circuit board Vibration Compensation mechanism OFF ON Driving coil and position detection sensor VC Lens (Compensation Optical System) VC microcomputer Gyro sensor for detecting yawing Focal Length 270mm (Equivalent to 419mm) Exposure F/29 1/50sec. Di Full-size format What does "Di II" mean? Digital SLR with APS-C size imager Designed to capture the optimum scope when used with a APS-C digital camera Since the size of full-size format is different from the APS-C size imager, scopes captured are different even when focal lengths are the same (i. e. , angles of view differ). The AF18-270mm Di-II is designed to have shorter focal lengths to achieve optimum angles of view in its wideangle side. Camera Principal ray Full-size format and APS-C size imager ­Angles of View and Focal Lengths Telephoto Images taken with a digital SLR with an APS-C size imager are actually cropped to about 70 % scope. 5°55' 75°23' Same Focal Length 28mm Focal Point image sensor Full-size format Full-size format: 419mm = Principal ray Angle of view Angle of view APS-C size imager: 270mm 52°58' Standard Focal Length Lights 31°11' APS-C size imager: 50mm Full-size format: 78mm 43. 27mm (smaller-size imagers) are about 24mm x 16mm. However, the dimensions and effective size differ depending upon manufacturers. 27. 9mm Focal Point about Film/ Image Sensor 36mm 23. 2mm Designed to fit APS-C size imagers in order to reduce its diameter Attempts to design shorter focal lengths inevitably result in a larger lens diameter. Tamron has solved this problem by designing the size of the lens' image circle to match that of APS-C size imagers. In the compact design, it is almost comparable to a lens offering the same angles of view in fullsize format. *When pictures are taken with a Di-II lens on a full-size format, image corners become dark (ie. , vignetting becomes noticeable). Image circle for Di-II lenses Vignetting when used with a full-size format camera = *The general image sensors 24mm APS-C size imager Mirror APS-C size imager full-size format Full-size format: 28mm *APS-C size imager = Digital cameras with smaller-size imagers, about 15. 5mm x 23. 2mm. *Full-size format = 24mm x 36mm Different Angles of View Diagonal 75°33' Horizontal 65°36' Equivalent Diagonal 31°11' Horizontal 26°7' Equivalent Diagonal 15°53' Horizontal 13°14' Equivalent Diagonal 7°59' = about 15. 5mm Wide 75°33' APS-C size imager: 18mm Horizontal 6°38' Equivalent Diagonal 5°55' Horizontal 4°55' Equivalent 18mm 28mm 50mm 78mm 100mm 155mm 200mm 310mm 270mm 419mm Categories of Tamron's Di lens series Di Lens Series Designed exclusively for digital cameras with APS-C size imagers. Di-II lenses are designed exclusively for digital SLRs with APS-C size imagers. [. . . ] +49 (0)221 970325-0, Fax +49 (0)221 970325-4 [. . . ]