- Description
- 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
You may also like
Recently viewed
Recent Blog Posts
View allZWO Duo camera's and compatible image circles
Maximize Performance with the Right Image Circle for Your ZWO ASI2600 and ASI585MC Air Cameras
If you're using one of the latest ZWO ASI Air cameras,
Read More
Read More
Navigating Optolong Filters: L-eNhance, L-eXtreme, and L-Ultimate for Astrophotography
Navigating Optolong Filters: L-eNhance, L-eXtreme, L-Ultimate, and L-Quad Enhance for Astrophotography
If you're capturing the night sky with a color
Read More
Read More
May 2025 The night sky this month. Galaxy season wraps up.
May is an exciting month for astronomers and skywatchers, offering captivating celestial events as galaxy season winds down and we prepare for the dar
Read More
Read More

