We may earn revenue from the products available on this page and participate in affiliate programs. Learn more › Believe it. Adoram’s ProOptic 500mm f/6.3 ($160, direct; adorama.com) shares all the ...

This is technically known as a catadioptric lens and has an unusual construction of mirrors and lens elements. As well as glass elements there are mirrors at the front and rear to fold the light as it ...

Kenko Tokina is releasing a 400mm f/8 mirror lens for Micro Four Thirds and Sony NEX cameras on Thursday in Japan. The lens will sell for around ¥22,000. Kenko Tokina is releasing a 400mm f/8 mirror ...

How do you perform gonioscopy in the office? What is your favorite lens? SHAN LIN, MD: I prefer the 4-mirror Posner- or Zeiss-style indirect gonioscopy lens (Ocular Instruments) (Figure 1). No ...

Kenko Tokina is set to launch their first new lenses designed for the micro four thirds standards this week in Japan. This exciting release includes a new 400mm f/8 Kenko Tokina Mirror Lens that will ...

Hands-on impressions and sample shots from the Kenko Tokina 400mm f/8 mirror lens for Sony NEX and Micro Four Thirds cameras. Hands-on impressions and sample shots from the Kenko Tokina 400mm f/8 ...