Tamron patented a bunch of zooms for APS-C and FF mirrorless system cameras:
- 18-50mm F3.6-5.3 for APS-C
Focal length 18.528 29.994 49.967
F value 3.605 4.324 5.308
Half angle of view 39.012 25.350 15.652
Image height 14.250 14.250 14.250 Overall
length 97.833 104.114 119.002
Back focus 37.320
- 25-115mm F4 for full size
Focal length 25.100 51.943 114.132
F value 4.105 4.108 4.140
Half angle of view 42.102 22.145 10.446
Image height 21.633 21.633 21.633 Overall
length 167.363 181.899 218.148
Back focus 39.824
- 28-120mm F4 for full size
Focal length 28.000 57.647 118.794
F value 4.113 4.111 4.113
Half angle of view 39.089 20.085 10.020
Image height 21.633 21.633 21.633 Overall
length 173.822 189.939 232.150
Back focus 45.497
via Digicameinfo