Tamron SKU: TCX20N700 | Helix SKU: TRTCX20N700
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.
With a teleconverter, it’s possible to capture photographs using an extended focal length.
Autofocus functions normally with compatible lenses. (Please refer to Compatible Tamron Lens List below.) VC (Vibration Compensation) performance is maintained.
The new teleconverters are 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.
These accessories embody Tamron’s new design that’s born from the pursuit of functional beauty and achieved by smoothly blending engineering and design enhancements. Meticulous craftsmanship is applied to every detail. The new teleconverters feature a metal lens barrel and share this same design concept. Both teleconverters provide remarkable ease of use—even the release lever offers a comfortable touch to the photographer’s finger.
|Optical Construction||9 elements in 5 groups|
|Maximum Diameter||φ69.8mm Canon
|Length**||53.6mm (2.1 in) Canon and Nikon|
|Entire Length***||66.8mm (2.6 in) Canon
65mm (2.6 in) Nikon
|Weight||360g (12.7 oz) Canon
305g (10.8 oz) Nikon
|Standard Accessories||Mount cap, Rear cap, Lens case|
Specifications, appearance, functionality, etc. are subject to change without prior notice.
* Use of the TC-X20 teleconverter reduces the effective aperture by two f/stops.
** Length is the distance measured from the camera mount face to the lens mount face.
*** Entire Length is the distance between the tip of the lens and the tip of protrusion.