The Longest Zoom: Tamron AF18-250mm

Tamron has upped it a notch again. It has released its 18-250mm ultra zoom lens to make it even better than its already very popular 18-200mm zoom.
The new Tamron AF18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro lens is a light and compact high powered zoom lens exclusively designed for digital SLR cameras with APS-C sized image sensors.
This is astounding because it’s quite a breakthrough. Tamron has extended the telephoto length of the very successful 18-200mm lens without adding much weight or bulk. It has achieved an astonishing 13.9x zoom power but added only a mere 0.2mm more in its maximum diameter and just 0.6mm in overall length.
The Tamron AF18-250mm offers a 388mm ultra telephoto focal length (diagonal angle of view of 6° 23′) when converted to the 35mm film format.
Compatible mounts for the versatile Tamron 18-250mm telephoto lens are: Canon AF, Sony/Maxxum AF-D, Nikon AF-D and Pentax/Samsung AF. (chrismalinao)
[Via Camera News]
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