Tamron AF 18-200mm F3.5-6.3 Canon Mount

Tamron AF 18-200mm F/3.5-6.3 Di-II LD(IF) Macro

The new AF18-200mm F/3.5-6.3 XR Di-II LD Aspherical (IF) MACRO is a high-power zoom lens designed for exclusive use with digital SLR cameras using smaller-size image areas. It inherits the product concept of the existing AF28-300mm F/3.5-6.3 XR Di zoom lens. Even two years after its introduction, the AF28-300mm XR is still a favourite with photographers around the world. With the recent rise of digital SLR cameras, high-power zoom lenses have become increasingly popular as they provide the convenience of handling many photographic situations and the capacity for ultra-telephoto shooting without changing lenses. The wide to ultra-tele focal range of this lens allows digital SLR camera owners* to enjoy digital photography with the same comfort and convenience previously afforded to film users.

* "Di (Digitally Integrated design)-II" lenses are designed for exclusive use on digital cameras with smaller-size imagers. This lens is not designed for use with 35mm film cameras and digital SLR cameras with image sensors larger than 24mm x 16mm.

Feature summary

Dedicated for digital SLR cameras
By incorporating an optical design for exclusive use with digital SLR cameras with smaller-size imagers, this high power zoom lens provides the same focal length, when converted to a 35mm format, equivalent to Tamron's 28-300mm. Therefore, you can meet virtually every photographic opportunity with this single zoom lens without changing lenses. When paired with the new ultra-wideangle SP AF11-18mm zoom lens, simultaneously introduced by Tamron at Photokina 2004 and expected to ship in late autumn 2005, you can thoroughly enjoy digital SLR photography with the combined focal length coverage of 17-300mm.

Optical system uses special glass and is optimised for digital SLR characteristics in order to enhance optical quality in a compact design
The new AF18-200mm high power zoom lens from Tamron features an entirely new optical design using XR (Extra Refractive Index) glass in an innovative way in order to optimize the overall distribution of optical power throughout the entire zoom range. This design reduces various aberrations to the absolute minimum and achieves remarkable downsizing at the same time. In addition, three hybrid aspherical lens elements and two LD (Low Dispersion) glass elements are used to accomplish effective compensation of on-axis and lateral chromatic aberrations, a critical factor to enhance the optical quality in digital photography. As a result, this lens is truly multi-purpose but still provides outstanding image quality.

Optical design dedicated to digital SLR photography by optimising the angles of incidences of light rays reaching the image sensor
The zoom lens uses a new optical system designed to confine the changing angles of incidences of light rays reaching the imager within a certain scope over the entire image field from the center to the periphery, by considering the effects of variances due to zooming.

Enhanced peripheral illumination
Peripheral light fall-off is minimised when compared with that of conventional lenses for film cameras so that images are uniformly bright from the centre to the periphery.

Outstanding resolution
Since the lens is designed exclusively for digital SLR photography, it provides high image quality in terms of resolution, contrast and flatness of image field.

Internal surface coating to reduce ghosting and flare
Ghosting and flare caused by aberrations are annoying factors in digital SLR photography, so Tamron has adopted various countermeasures against the problem including the employment of “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 minimise reflections that occur when light enters through the front element and to reduce image degrading effects caused by the imagers themselves.

Revolutionary minimum focus distance – 0.45m (17.7") for 1:3.7* macro capability
It is an important condition for a multi-purpose zoom lens to provide the capability of getting close to the subject. The new 18-200mm zoom lens realises an MFD (Minimum Focus Distance) of 0.45m (17.7") through the employment of a new optical/mechanical design configuration. Since the maximum magnification ratio at 200mm is 1:3.7*, you can enjoy close-up photography easily and conveniently.

* The Maximum Magnification Ratio of 18-200m (Model A014) is 1:3.7 while the Maximum Magnification Ratio of the 28-300mm (Model A061) is 1:2.9. However, the A014 can fill the frame with almost the same scope as the A061 does when shooting with a 35mm SLR camera, since the new lens is exclusively designed for digital SLR cameras with smaller-size imagers. The Maximum Magnification Ratio of 1:3.7 is equivalent to 1:2.8 when converted to 35mm film format.

High power, yet compact and lightweight thanks to newly developed mechanisms
New and complex mechanisms are hidden in the compact construction of the new AF18-200mm F/3.5-6.3 XR Di-II LD Aspherical (IF) MACRO. Several engineering innovations were required to downsize the design, produce high-precision parts and increase durability, imbuing this multi-purpose zoom lens with excellent portability and ease of use.

Zoom Lock mechanism incorporated
The Zoom Lock prevents unwanted barrel extension when carrying the lens/camera combination.

Flower-shaped lens hood
A glare-reducing flower-shaped lens hood is included as a standard accessory. The special hood provides optimum shading of superfluous light rays that enter from the rectangular frame outside the image field.

New external design on the Di-II series conveys “high-performance, high-precision" image
Improvements have been made to the external design 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 complement the digital camera design style and to provide better handling.

Specifications

• Model name  A14
• Focal length 18-200mm
• Maximum aperture F/3.5-6.3
• Angle of view  75° 33' - 7° 59'
• Lens construction 15 elements in 13 groups
• Minimum focus distance 0.45m (17.7")
• Maximum magn. ratio 1:3.7 (at f=200mm MFD 0.45m)
• Filter diameter ö62mm
• Overall length 83.7mm (3.3") *
• Maximum diameter ö73.8mm (2.9") 
• Weight 398 grams (14oz.) *
• Diaphragmblades 7 blades
• Minimum aperture F/22
• Standard accessory Flower-shaped lens hood
• Compatible mount Canon AF, Konica Minolta AF-D, Nikon AF-D and Pentax AF