SVBONY SA401 20-60x85 Spotting Scope
- 85mm Objective Lens Diameter
- 20-60x Magnification Range
- Apochromatic (APO) Double ED Glass
- 20-18mm Eye Relief
- IPX5 Waterproof Rating
The SA401 20-60x85 Spotting Scope combines a large 85mm objective lens with an Apochromatic (APO) Double ED glass optical system to deliver images free of chromatic aberration. Its 450mm focal length and 20-60x magnification provide a wide 2.2° field of view for scanning and high power for resolving fine details. With a generous 20-18mm eye relief and a robust, IPX5 waterproof construction, this 2192g scope is engineered for critical observation in demanding field conditions.
The heart of the SA401 is its 85mm objective lens, built with a 4-piece, 3-group Apochromatic design that incorporates two Extra-Low Dispersion (ED) glass elements. This advanced optical configuration brings all wavelengths of light to a single focal point, virtually eliminating the purple and green fringing (chromatic aberration) that can soften images in standard scopes. The result is a sharp, high-contrast view with color fidelity that is critical for identifying subtle plumage on distant birds or analyzing target details.
A sophisticated 8-piece, 5-group eyepiece provides a versatile 20-60x magnification range, allowing you to sweep a wide area and then zoom in precisely on your subject. At 20x, the field of view is a generous 114 feet at 1000 yards, perfect for locating targets. The scope's 20-18mm of eye relief remains comfortable across the entire zoom range, a significant advantage for eyeglass wearers who can see the full field of view without removing their glasses.
Built for outdoor use, the SA401 features an IPX5 waterproof rating, ensuring it can withstand rain and wet conditions without fogging internally. The classic Porro prism optical path is known for its excellent light transmission and creating a rich sense of depth in the image. The entire assembly weighs 2192g and is protected by a durable rubber armor, demanding a sturdy tripod for stable viewing, which can be attached via the standard 1/4" mounting point.
The primary benefit is superior color correction. The Apochromatic (APO) Double ED glass system significantly reduces chromatic aberration, or false color fringing. This results in sharper, higher-contrast images with true-to-life colors, which is essential for detailed observations like identifying bird species or scoring targets.
This long eye relief allows you to see the entire field of view comfortably, even while wearing eyeglasses. Many scopes have shorter eye relief that forces eyeglass wearers to press their lenses against the eyepiece or remove them entirely. The SA401's design prevents this, making long viewing sessions more comfortable.
Yes. The SA401 has an IPX5 waterproof rating, which means it is protected against low-pressure water jets from any direction. This makes it reliable for use during rain or in generally wet environments without risk of internal fogging or water damage.
Given its weight of 2192g (about 4.8 lbs), a sturdy, full-size tripod is required for the SA401. Look for a tripod with a fluid head rated to carry at least 8-10 lbs to ensure stable, vibration-free viewing, especially when using the higher 60x magnification.
The SA401 is excellent for this scenario. At 1000 yards, you can use the 20x magnification to scan a wide 114-foot area to find the bird. Once located, you can increase magnification to 60x to resolve fine details like feather patterns and beak shape, with the APO optics ensuring colors are accurate for positive identification.
Absolutely. The 85mm aperture gathers a significant amount of light, and the APO optics will provide crisp, high-contrast views of the Moon. At 60x magnification, you will be able to clearly identify major craters, mountain ranges, and the maria (lunar seas), making it a capable tool for casual astronomical observation.
| Product Name | APO Spotting Scope |
| Objective Lens Diameter | 85mm |
| Magnification | 20-60X |
| Objective Lens Design | 4 pieces / 3 group (Double ED) |
| Objective Focal Length | 450mm |
| Eyepiece Design | 8 pieces / 5 group |
| Eyepiece Focal Length | 7.5mm - 22.5mm |
| Eyepiece Diameter | 24mm |
| Field of View (Angle) | 2.2° - 1.14° |
| Field of View (Distance) | 114-60 ft @ 1000 yds / 38m-20m @ 1000m |
| Eye Relief | 20mm - 18mm |
| Exit Pupil | 4.3mm - 1.4mm |
| Near Focus | 7.5m |
| Prism Type | Porro Prism |
| Prism Glass | H-K9L |
| Coatings | Super Fully multi-coated |
| Waterproofing | IPX5 |
| Armor Material | Rubber |
| Tripod Mount | 1/4" |
| Dimensions | 15.7 inch |
| Net Weight | 2192g |
| Tube Diameter | 100mm |
| Eyepiece Outer Diameter | 53.5mm |
| Color | Army Green |
| Included Case | Nylon soft bag |