| Model | F9158A |
| Eyepiece Type | Svbony PL Eyepiece |
| Focal Length | 4mm |
| Lens Coating | FMC |
| Angle Field of View | 48 Degree |
| Lens Design | 4 Elements |
| Material | Metal & Optical Glass |
| Eyecup Material | Rubber |
| Barriel Size | 1.25 inch |
| Filter Threads | M28.5*0.6 (for standard 1.25 inch filters) |
| Weight | 63g /2.19oz |
| Height | 45mm /1.77inch |
