The Tamron AF 18-250mm f/3.5-6.3 Di-II LD Aspherical IF Macro Lens
is a lightweight, compact and ultra high power zoom lens designed
exclusively for digital SLR cameras with APS-C sized imager sensors.
The focal length of this lens is equivalent to approx. 29-400mm in 35mm
format. This lens offers an extreme zoom ratio of 13.9X, and is
designed as the everyday "all-in-one" lens for digital SLR cameras,
covering wideangle to long telephoto.
The lens uses an optical system specially designed for digital SLR
cameras. This resulted in the sufficient compensation of aberrations,
including astigmatism, compactness, thanks to downsizing of the first
group, a high zoom power, and optimum optical quality.
Note! Not compatible with 35mm or digital cameras with image sensor larger than APS-C size
- Advanced Optical Design
-
One LD (Low Dispersion) glass element and one AD (Anomalous Dispersion)
lens in the first lens group minimize on-axis chromatic aberration. Two
hybrid aspherical lens elements serves to meet the desired compactness
despite its 13.9X zoom power.
- Internal Surface Coating to Reduce Ghosting and Flare
-
This lens features Internal Surface Coatings (i.e., multiple-layer
coatings on cemented surfaces of plural elements) and new
multiple-layer coating technology on ordinary elements in order to
minimize reflections that occur when light enters through the front
element and to reduce image degrading effects caused by the imagers
themselves.
- Zoom Lock Mechanism
-
The Zoom Lock prevents unwanted barrel movement when carrying the lens/camera combination.
- Di-II Series Design
-
Design has been improved by adding a gold-colored band between the
focus and zoom rings to enhance the appearance and make it stand out as
a Di-II lens. The rubber patterns of the zoom and focus control rings
have been improved at the same time to compliment the digital camera
design style and to provide better handling.