SVBONY SV193 2-Inch 0.8× Focal Reducer / Field Flattener for SV503 102ED
The SV193 0.8× focal reducer and field flattener improves imaging performance on the SV503 102ED by widening the field, reducing exposure times and correcting edge curvature for sharp stars across the frame.
- Standard 2" nosepiece for the telescope side; M48×0.75 thread on the camera side. Supports full-frame sensors.
- Supports standard 2" filters for adding light-pollution or narrowband filters.
- 0.8× reduction provides a faster focal ratio and shorter exposure times.

3-Element, 2-Group Lens Structure

Hard-Anodised Aluminium Body

SV193 for SV503 102ED — Structure

SV193 for SV503 102ED — Installation Steps

SV193 Photo Reducer / Flattener for Astrophotography

Specifications
| Model | SV193 | |
|---|---|---|
| Fit For | SV503 80ED F7 | SV503 102ED F7 |
| SKU | W9152B | W9152D |
| Back Focus | 55 mm | 55 mm |
| Barrel Size | 2-inch | 2-inch |
| Thread Standard | M48×0.75 | M48×0.75 |
| Lens Structure | 3 elements / 2 groups | |
| Lens Coating | FMC | |
| Blackened Lens Edges | Yes | |
| Net Weight | 164 g / 5.78 oz / 0.36 lb | 177 g / 6.24 oz / 0.39 lb |