0.8x Field Flattener Reducer for SV550 122mm f/7 Telescope

This 0.8x focal reducer and field flattener is designed to optimize astrophotography with a 122mm f/7 triplet APO refractor telescope. By reducing the focal length from 854mm to 683.2mm and lowering the f-ratio to f/5.6, it enables faster image capture and a wider field of view. The device also corrects field curvature, ensuring sharp, edge-to-edge focus across DSLR and CCD imaging sensors. Its fully multi-coated optics deliver high-quality, clear images for both astronomical and terrestrial photography. The reducer securely threads into the focuser with a standard 63x1 metric thread and maintains a 55mm back focus ideal for DSLR cameras.

Key Features:

• Reduces focal length from 854mm to 683.2mm (0.8x) for faster imaging

• Flattens field curvature for sharp images to sensor edges

• Fully multi-coated lens for improved light transmission and clarity

• Compatible with 122mm f/7 triplet APO refractor telescopes

• Metric 63x1 thread for secure attachment to focuser

• Standard 55mm back focus designed for DSLR camera bodies

Specifications:

• Model: SV209

• Type: Focal Reducer / Field Flattener

• Focal reduction: 0.8x (from 854mm to 683.2mm)

• F-ratio change: from f/7 to f/5.6

• Thread size: Metric 63x1

• Back focus distance: 55mm

• Lens coating: Fully multi-coated

Package Contents:

• 1 x 0.8x Focal Reducer / Field Flattener

• 2 x Dust Covers

Note: Specifically designed for use with the SV550 122mm f/7 APO refractor telescope.