Vixen Telescope Focal Reducer for F7.7 ED

For photography of nebula or star clusters

This reducer is designed to shorten the effective focal length. This allows shorter exposure times and a wider field of view for astrophotographers. Since you can obtain a wide field of view, it becomes easier to capture nebulae and star clusters that have spread.

Reduce the focal length (0.67x) and make F-ratio fast. It also has the effect of reducing the aberration near the edge of imaging field.

Specifications

• Usable on: ED81S, ED81S II, ED103S, ED115S
• Lens coating: Fully multicoated
• Prime focus photography: Wide photo adapter 60mm and T-ring are needed separately
• F-ratio: ED81S / 625mm（F7.7）→419mm（F5.2）, ED81S II / 625mm（F7.7）→419mm（F5.2）, ED103S / 795mm（F7.7）→533mm（F5.2）, ED115S / 890mm（F7.7）→596mm（F5.2）
• Weight: 174g