Rear Lens Cap for Fujifilm X-Mount Lenses. Compatible with XF 50-140mm & 100-400mm. 2x Magnification Factor. RELATED PRODUCTS. ULTIMAXX DJI Phantom 3 LED Light Strip (White, 1.5M / 5ft) bb (4800. Received my item exactly as described. ).
Coupled with the 100-400 it gives a reach of 1200mm , very good for birding
IQ suffers a bit, not a lot
Under low light the aperture may be a tad too dim
The 1.4 is smaller and is preferred but if you need the extra reach then the 2x is a must