Vixen Reducer HD Kit for FL55SS ES37253 – High‑Performance Reducer & Field Flattener Kit for FL55SS Refractor

Turn Your FL55SS Into a Fast, Wide-Field Astrophotography Rig

The Reducer HD Kit upgrades your FL55SS refractor for serious deep-sky imaging. It shortens the focal length from 300mm to 237mm and speeds up the focal ratio from f/5.5 to f/4.3 — meaning wider fields of view and shorter exposure times for the same brightness. The built-in field flattener ensures stars stay sharp and round all the way to the corners of your sensor, even on full-frame cameras.

Everything needed to connect the kit to your camera is included.

Note: compatible with the FL55SS refractor only.

Who This Is For

• FL55SS owners wanting to shoot wide-field deep-sky images with a DSLR or mirrorless camera
• Astrophotographers who want faster imaging speeds and full-frame coverage without changing telescopes

What You Can Image

• Large nebulae: Orion, Rosette, North America, Heart & Soul
• Wide Milky Way fields and star-forming regions
• Open clusters and large galaxies

Key Features

• Reduces focal length to ~237mm (f/4.3) for faster, wider imaging
• Field flattener ensures sharp, distortion-free stars across the full frame
• Covers a 44mm image circle — enough for full-frame sensors
• AS anti-reflection coatings (~99.9% transmission per surface) for high contrast with minimal ghosting
• Includes reducer lens, field flattener lens, and extension tube (EX Tube 66) for correct camera back-focus

Specs