- Reduces the focal ratio from f/5.8 to f/4.93 – shorter exposure times
- Screws directly to the focuser
- M48x0.75 thread (male)
- Back Focus distance is 55 m.
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0.85x Focal Reducer/Corrector for Sky-Watcher EVOSTAR ED72
Designed for serious Astro-Imagers. Optimized for the Sky-Watcher EVOSTAR ED72, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0.85x and provides much improved field-edge correction. Use in conjunction with Sky-watcher’s M48 Sony, Canon or Nikon T-ring adaptors. The optimal working distance from the M48x0.85 connection thread of the corrector is 55 mm.
|Focal length reduction
|EvoStar 72 ED OTA
|Connector (at camera end)