Tamron has launched two teleconverters exclusively for select Tamron lenses. Tele Converter 1.4x (TC-X14) increases the focal length by a factor of 1.4x, while Tele Converter 2.0x (TC-X20) doubles the focal length.
Canon and Nikon mounts are first to be released.
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.
Autofocus functions normally with compatible lenses. VC (Vibration Compensation) performance is maintained.
The new teleconverters are said to be ideal for use in outdoor photography when matched with any lens that has a Moisture-Resistant Construction because special seals that are dust-resistant and moisture-proof are used at every joint and seam.
The barrel frame of the teleconverters is made of die cast aluminum, except for some parts of the exterior finish, to maintain extra strength when used with large lenses. The design utilizes a bayonet mount made of brass on the camera side and stainless steel on the lens side to ensure excellent durability even with repeated mountings and detachments.
The 1.4x model features 6 elements in 3 groups, while the 2.0x model has 9 elements in 5 groups.