The dedicated Leica 2x APO Extender-R (also known as a teleconverter) 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 the 280mm f/2.8 APO lens will effectively increase the focal length to 560mm. A lens set to f/2.8 will now be f/5.6.
Compatible with all R-type lenses.
Fully compatible with all R3 to R9 SLR cameras for manual exposure control, and also supports electronic exposure control with the R8 and R9.
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