Fujifilm recently has filed two lens patents for X-mount APS-C mirrorless cameras. They are Fujifilm XF 300mm f/4 Lens and Fujifilm XF 500mm f/5.6 Lens.
Embodiment 1
Focal length: 292.94 mm
F number: 4.11
Angle of view: 5.6
Embodiment 4
Focal length: 486.99 mm
F number: 5.76
Angle of view: 5.0
via: HLN