F6.3 Focal Reducer For Schmidt Cassegrain Telescopes With SCT Threads Four Element Fully Multi Coated Optics Beef Up Light Transmission And Shorten Your Focal Length To F6.3 Without Compromising Image Quality
✔️ Single unit SCT interface, reduces to f/6.3 for C5 to C14 SCTs.
The F6.3 focal reducer/corrector is a compact, metal-bodied adapter designed to attach to Schmidt-Cassegrain telescopes from 5" to 14". It shortens the native f/10 focal ratio to f/6.3, widening the field of view and cutting exposure times in astrophotography while preserving image quality.
✅ Works with C5, C6, C8, C9.25, C11, and C14 SCT telescopes.
✅ Reduces focal ratio from f/10 to f/6.3 for most SCTs; C14 yields ~f/7.
✅ Four-element, fully multi-coated optics boost light transmission.
✅ Aluminum alloy housing with precise SCT thread interface.
✅ Dimensions 49 x 34 x 55 mm; net 0.1 kg, gross 0.22 kg.
💡 What is a focal reducer for Schmidt-Cassegrain telescopes used for in astrophotography?
This handy accessory speeds up imaging by widening the field of view and shortening exposure times.
- Shortens focal ratio from f/10 to f/6.3 on 5"-9.25" SCTs
- Increases light transmission with four-element fully multi-coated optics
- Compact aluminum housing with SCT threading