聚焦系统
| 最近聚焦距离 |
7 m |
| 光阑叶片数量 |
9 |
| 对角线视角（最大） |
3.1 ° |
| 最小光圈 |
5.6 |
| 最大光圈 |
32 |
Telephoto 800mm f/5.6 EX DG APO HSM for Autofocus Lens Pentax EOS
800mm ultra telephoto lens optimized for digital SLR cameras.
New multi-layer lens coating and lens design reduce flare and ghosting. Extraordinary Low Dispersion (ELD) glass elements produce excellent image quality and ensure sharp, quality images for film and digital SLR cameras. It enables to see the far subjects in more detail than is possible with the naked eye.
Reduction of flare and ghosting.
This digitally optimized ultra telephoto lens is equipped with a new multi-layer coating technology that reduces both flare and ghosting. This also ensures an accurate color balance and high definition results.
ELD Glass elements ensure high quality images.
Incorporating two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum and ensure sharp, quality images.
HSM (Hyper Sonic Motor for Sigma, Canon and Nikon mount lenses).
The HSM models (Sigma, Nikon and Canon mounts) provide high-speed, ultra-quiet AF function as well as full- time manual focus override.
It features a drop-in filter.
This new lens also supplied with a 46mm gelatin filter holder at the rear, allowing the use of gelatin filters.
Inner focusing.
Inner focusing retains external dimensions for ease of handling.
Optional Sigma tele-converter.
By adding Sigma’s dedicated APO EX Tele Converter 1.4x and 2x, you can use this lens as a 1120mm F8 MF, or a 1600mm F11 MF lens respectively.
