Up for sale is a pre-owned Tamron F 2x Tele Converter for Pentax KR MC4 AutoFocus Lenses and Cameras.


The 2x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x, and will cut back the amount of light by 2 f/stops. For example, using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6.

Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors. Manual focusing is recommended when using lenses with smaller open f-stop value than those given above.

· Multi-coated elements result in crisper images

· Comes with rear cap



Unit has been tested and works. Condition: Very Good. (See Grading Scale for details)



See pictures for more details.



If you have any questions please feel free to ask.


Shipping and handling is only $5 to any destination in the Continental US*. Contact us prior to purchase for international and p.o. box rates.



Have a great day!!!