Celestron Reducer Lens 0.7× — EdgeHD 925 (94245) This dedicated 0.7× reducer makes the EdgeHD 9.25 one full f-stop faster, from f/10 to f/7, halving exposure times and increasing the field of view by 43%. Its four-element design, with extra-low-dispersion and lanthanum elements, maintains the EdgeHD's flat field.
Manufacturer model: Celestron Reducer Lens .7x EdgeHD 925 (94245) · Specifications checked against manufacturer data on 2026-11-03
This dedicated 0.7× reducer makes the EdgeHD 9.25 one full f-stop faster, from f/10 to f/7, halving exposure times and increasing the field of view by 43%. Its four-element design, with extra-low-dispersion and lanthanum elements, maintains the EdgeHD's flat field.
The reducer threads directly onto the EdgeHD's 3.25-inch rear thread, which reduces mechanical vignetting and allows full-frame sensors and off-axis guiders. Lens elements up to 60 mm clear aperture keep the optimised image circle at 42 mm. Back focus stays at 146 mm, the same as at f/10, so existing EdgeHD T-adapters still work.
| Celestron item number | 94245 |
|---|---|
| Compatible telescope | Celestron EdgeHD 925 only |
| Reduction | 0.7× (f/10 to f/7); field of view +43% |
| Lens elements | 4, including ED and lanthanum elements |
| Coatings | Fully multi-coated; blackened lens edges |
| Telescope connection | 3.25-inch EdgeHD rear thread |
| Clear aperture | Up to 60 mm |
| Optimised image circle | 42 mm |
| Optimum back focus | 146 mm |
Celestron Reducer Lens 0.7× EdgeHD 925
EdgeHD 925 only. Celestron page weight is internally inconsistent ('2.3 lbs (1.47 kg)'); weight omitted from storefront.
| Field of view increase (%) | 43 |
|---|
Ficha técnica
Celestron Reducer Lens 0.7× — EdgeHD 925 (94245) This dedicated 0.7× reducer makes the EdgeHD 9.25 one full f-stop faster, from f/10 to f/7, halving exposure times and increasing the field of view by 43%. Its four-element design, with extra-low-dispersion and lanthanum elements, maintains the EdgeHD's flat field.
Manufacturer model: Celestron Reducer Lens .7x EdgeHD 925 (94245) · Specifications checked against manufacturer data on 2026-11-03
