All-metal mirror structure
48-degree wide field of view
FMC full broadband multilayer coating
4-Element in 2 groups optical structures
M28.5*0.6 threaded standard for 1.25-inch interface
The lens edges and inside the barrel are light-removed.
Great Quality/price for F4 Newtonian
noticeable upgrade compared to simple eyepieces
Model | SV131 | SV131 | SV131 | SV131 | SV131 |
Eyepiece Type | Plossl | Plossl | Plossl | Plossl | Plossl |
Focal length | 6mm | 12mm | 17mm | 25mm | 40mm |
Field of View | 48-Degrees | 48-Degrees | 48-Degrees | 48-Degrees | 48-Degrees |
Exit Pupil | 3.5mm | 9mm | 11mm | 16mm | 22mm |
Field Stop Diameter | 5mm | 12mm | 16mm | 24mm | 25.6mm |
Lens group | 2 Group / 4PCS | 2 Group / 4PCS | 2 Group / 4PCS | 2 Group / 4PCS | 2 Group / 4PCS |
Lens coated | FMC | FMC | FMC | FMC | FMC |
Side of the lenscoate | Extinction Ink | Extinction Ink | Extinction Ink | Extinction Ink | Extinction Ink |
Material | Metal | Metal | Metal | Metal | Metal |
Thread size | M28.5*0.6 | M28.5*0.6 | M28.5*0.6 | M28.5*0.6 | M28.5*0.6 |
Non-slip Cover | Yes | Yes | Yes | Yes | Yes |
Eyecup type | Rubber | Rubber | Rubber | Rubber | Rubber |
Net Weight | 48g/1.69oz | 56.8 g/2.00oz | 71.7 g/2.53oz | 83.6 g/2.95oz | 142.8g/5.04oz |
Dimension | Ø33.5x40mm | Ø33.5x43.7mm | Ø35.5x50mm | Ø35.5x61.5mm | Ø41x88.5mm |
- SV131 Eyepiece has five focal length sizes, meeting different needs. It has a high-quality image for its fully coating in each glass. Besides, the 48-degree field of view allows you to see more bright images. The all-metal mirror structure will give you comfortable touching. M28.5*0.6 threaded supports 1.25-inch filter adapter installation. The lens edges and inside the barrel are light-removed, which can prevent stray light. The 4-element in 2 groups optical structure brings the great clear images. This eyepiece will show you a brilliant viewing.