Description
Highlights
- Corrects for field curvature, allowing the EvoGuide 50ED and 50DX to be used for astrophotography
- Thread on metal caps
- T-thread connection or 1.25" opening for camera mounting
- 28mm imaging circle
- 17.5mm back focus
- 5.33 x 3.57-degree field of view when used with APS-C crop sensor