Three new zoom lens patents were recently filed from Tamron, Canon and Olympus:
→ Tamron 70-200mm f/4 VC lens patent (full frame lens for DSLR camera)
→ Canon EF 40-800mm f/4.5-5.6 lens patent
→ Olympus 300-500mm f/2.8-4.0 lens patent
Via Egami
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