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Tamron introduced two teleconverter models exclusively for select Tamron lenses. These accessories make it easy to expand the versatility of the attached lens. TELECONVERTER 1.4x increases the focal length by a factor of 1.4x, while TELECONVERTER 2.0x doubles the focal length.
Although the maximum focal length is increased, the minimum object distance remains nearly the same, so the magnification ratio during close focusing is enhanced. Both teleconverters are carefully designed and constructed to preserve the original superior image quality of the lens. The 2.0x model uses one LD (Low Dispersion) lens element to suppress aberrations. BBAR (Broad-Band Anti-Reflection) coatings are deployed on both models to help minimize ghosting and flare.
Tamron teleconverters provide powerful and creative options for your telephoto photography. A Tamron teleconverter mounted between the lens and the camera body increases the focal length of the host lens, providing greater magnification from the same camera position.
The Tamron SP designation is reserved for products developed with special emphasis on extraordinary photographic performance. Engineers are free to innovate in an uncommon atmosphere where optical performance comes before price, resulting in optics that satisfy the demands of discerning photographers.