The Tamron AF18 270mm F/3.5-6.3 Di II VC PZD for Canon is a 15x high power zoom lens crafted especially for Canon's digital SLR cameras. It is designed using the compact digital size image sensors. It sports a focal length that is equal to about 28 to 419mm when compared to the 35mm format. This is the ultimate all in one solution to every photographer's needs. It effectively meets all your photographic opportunities and without you even having to change lenses!
This lens incorporates the PZD, i.e. Piezo Drive Ultrasonic autofocus motor into its design. This makes the lens considerably lighter, shorter, thinner, compared to any of the previous lenses in the category. This is autofocusing that is not only quicker but also quieter. And it doesn’t stop there; the lens also employs the Vibration Compensation mechanism that enables the use of shutter speeds that are incredibly slower that normally possible. And this too with no perceptible increase in image blur at high zooms. This function automatically detects movements of the camera and even compensates for camera shakes when shooting a moving object. This makes for blur free and sharp pictures each time. This feature is crucial in a lens that possesses a longer range of focal length, such as this one.
This lens focuses right down to 19.3inch all through the zoom range. It has a compact design and a light weight that makes it easier to handle. Further simplifying the handling of this lens is the rubber pattern of the zoom and focus control rings. These patterns have been improved not only to compliment the digital camera design style better, but also to make this marvel easier to use. It also inserts a new gold colored band between the focus and zoom rings on its body. This makes it stand out distinctly as a Di II lens. It is compatible with Canon digital SLR cameras though it is designed especially for the superior DSLR cameras with sensors that are smaller in size. This lens is not compatible with 35mm film cameras and DSLR cameras that use image sensors that are larger than 24 x 16mm.
New mechanism Piezo Drive (PZD)
The lens has a newly developed Piezo ultrasonic motor to ensure quiet, accurate and blazingly fast autofocus.
Innovation for parts and simplify reducer operation also contribute to reduce the weight and size of the target.
Ultrasonic motors are divided into two categories depending on the type of energy generated. There engines and motors traveling wave standing wave. Autofocus new 18-270 mm operating according to the principles of the standing waves, while the ultrasonic motor silent new Tamron 70-300mm USD uses a traveling wave. In the beginning Tamron PZD standing wave a high frequency voltage in the piezoelectric element is created. Thus it moves to a standing wave movement. The metal tip on Piezo ceramic navigates the rotational movement of the element in an elliptical rotation and drives the rotor by friction. Standing wave motors have the advantage of being more compact than the traveling wave. This allows smaller sizes of targets. The Tamron Piezo Drive is distinguished by its high-speed autofocus, high accuracy and ultra-quiet movement.