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Patents: Tamron 300mm f/2.8, 400mm f/4 and 500mm f/4 Lenses

It seems that Tamron is working on several fast super telephoto prime lenses. Recently Tamron has filed three new patents for Tamron 300mm f/2.8, 400mm f/4 and 500mm f/4 lenses, which are designed for a 35mm full-frame sensor. Take a look at the patent details below:

Embodiment 1: 300mm F/2.8

  • Focal length: 304.799 mm
  • F No.: 2.8
  • ω: 3.997
  • Image height: 21.64 mm
  • Back focus: 70.1919 mm
  • Lens length: 298.38 mm

Embodiment 2: 400mm F/4

  • Focal length: 396.296 mm
  • F No.: 4.0
  • ω: 2.963
  • Image height: 21.64 mm
  • Back focus: 102.3549 mm
  • Lens length: 332.36 mm

Embodiment 3: 500mm F/4

  • Focal length: 485.045 mm
  • F No.: 4.001
  • ω: 2.530
  • Image height: 21.64 mm
  • Back focus: 125.2621 mm
  • Lens length: 420.001 mm

Via: so-net

Related posts:

  1. Patents: Olympus 300-500mm f/2.8-4.0 and 200-300mm f/2.8-4.0 MFT Lenses
  2. New Patent: Tamron SP 100-400mm f/4.5-6.3 VC Lens
  3. Tamron Patents 3 Lenses (28mm, 50mm and 60mm f/2.8) for Sony FE Cameras
  4. Nikon 200-500mm f/5.6E vs 200-400mm f/4G II vs 80-400mm f/4.5-5.6G Specs Comparison
  5. Tamron 18-400mm f/3.5-6.3 Di II VC HLD Lens Specs Leaked, Price $649

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