Tamron Patent for 18-50mm f/3.6-5.3 APS-C and 24-120mm f/4.0 FF Lenses

New Tamron patent discloses the 18-50mm f/3.6-5.3 for APS-C and 24-120mm f/4.0 for FF lenses.

Tamron has filed a new patent for a 18-50mm f/3.6-5.3 for APS-c sized mirrorless cameras. If you can achieve reasonably good optical performance with this spec, it will be one of the popular Tamron lenses.

Tamron Patent for 18-50mm f/3.6-5.3 APS-C and 24-120mm f/4.0 FF Lenses

• 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