Sky-Watcher 0.85x Reducer/Flattener for EvoStar 72ED - Compatible with both APS-C and full frame sensors, APS-C (crop sensors) and smaller recommended
- 55mm back focus
- Drops f/ratio from native f/5.8 (420mm) to f/4.93 (355mm)
- Reduces exposure time by 38% compared to native f/5.8
- 5.8 x 3.87-degree field of view when used with a full frame camera
- 3.79 x 2.53-degree field of view when used with APS-C crop sensor
- Includes thread-on adapter to mount reducer to Evostar 72ED focuser
SPECIFICATIONS - SUPPORT DOCUMENTS Manuals: - About Sky-Watcher  Sky-Watcher was launched in 1999 featuring a modest line of Newtonian and refractor optical tubes, with distribution in Europe and Asia. In 2000, Sky-Watcher released their first series of Dobsonian telescopes, and two years later answered the rising popularity of digital SLRs with their first version of the famed German Equatorial Mount, the EQ6. Today, with a full product line that includes Dobsonians, APO refractors, EQ mounts, and photography products, Sky-Watcher has grown into the most popular telescope brand worldwide. |