Tamron has just filed a new lens patent for a 200-800mm f/6.5 lens. Currently no info yet whether this lens is a DSLR lens or mirrorless lens.
Embodiment 1
Focal length: 205.426 447.698 774.302 mm
F number: 6.583 6.586 6.583
Angle of view: 6.008 2.752 1.586
Image height: 21.633 21.633 21.633 mm
Back focus: 56.1827 mm
Total length: 415.348 415.348 415.348 mm
via: hi-lows-note