Last updated on September 16th, 2025
The Maven CS.1A is a spotting scope aimed at shooters, hunters and outdoor users who need clear glass in a compact little package. Its built around a 65mm objective lens with a magnification range of 15 to 45. The scope weighs 1.15 kilograms and measures just under 29 centimeters in length. That puts it in the smaller end of the mid-sized spotting scope class.
Maven Optics @PrecisionRifle
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The body is made from a mix of magnesium and aluminium, which keeps weight down while still being durable. The housing is waterproof and fog proof, with nitrogen purging and an IPX7 rating. That means it can survive being out in the rain or packed into a wet bag. The lenses are fully multi-coated and treated to resist scratches. These coatings also help with light transmission and reduce glare in bright conditions.
Inside, the scope uses ED glass and a Schmidt-Pechan prism system with phase correction coatings. In practice this gives a bright and sharp image with good colour accuracy. Edge-to-edge clarity is solid for its size and price bracket. At lower magnifications the image is very clean and easy on the eye. At the higher end of the zoom range there is some softness, which is common in scopes at this level. Even so, spotting hits at distance or picking out detail on game remains practical.
The eyepiece is fixed and angled at 45 degrees. Eye relief sits at about 19 millimeters, which works well with or without glasses. The focus wheel is positioned in the center of the body and is smooth to adjust. The zoom collar is also easy to turn, with enough resistance to hold in place. Mounting is straightforward with a rotating tripod collar that locks firmly. On a stable tripod the CS.1A feels balanced and steady, even at maximum magnification.
In the field the scope is compact enough to pack into a rucksack without being a burden. For hunters this makes it realistic to carry on longer days out bush. On the range it provides enough clarity to call shots at typical long range distances without needing a larger 80mm class spotter. The smaller size does limit low-light performance compared to bigger objectives, but it still handles dawn and dusk glassing well enough.
Price sits around 800 US dollars. Maven uses a direct to consumer model which cuts out dealer margins. For shooters this means you get performance and build quality that usually costs more when buying from the larger optics brands. In terms of competition, the CS.1A lines up against scopes like the Vortex Viper HD 65mm or Leupold SX-4 Pro Guide 65mm. It comes in lighter than both, while still offering comparable clarity. Having used my mates one here in Aus and hunting in NZ, I am impressed by this little spotter.
The Maven CS.1A is a practical spotting scope for shooters who want a balance of performance and portability. It has clear glass, a solid build and is light enough to carry into the field. While maximum magnification is not as sharp as premium models, the overall package delivers well for its price. For hunters and long range shooters who want a reliable mid-sized spotter, the CS.1A is worth serious consideration.
Maven CS.1A Spotting Scope
Specifications
Magnification Range: 15× – 45×
Objective Lens Diameter: 65 mm
Exit Pupil: 4.3 mm / 1.4 mm
Field of View: 3.3° / 1.5° (174 ft / 81 ft per 1,000 yds)
Apparent Field of View: 50° / 70°
Brightness: 18.5 / 2.0
Twilight Factor: 31 / 54
Eye Relief: 16–19 mm
Eyecups: Multi-position
Eyepiece Construction: 5-group, 8-element
Minimum Focus Distance: 12 ft
Dimensions: 11.4″ × 5.6″ × 3.1″
Weight: 40.4 oz
Prism Type: Schmidt-Pechan (fully multi-coated, phase-corrected)
Lens Coating: Fully multi-coated, ED glass
Frame Material: Magnesium / Aluminum
Fog-proof: Nitrogen-purged; Waterproof: IPX7
Operating Temp: –13 °F to 140 °F; Storage Temp: –40 °F to 158 °F
Objective Filter Thread: None
Included Accessories: Lens caps, double-layer microfiber bag
Origin: China
MSRP: US $800 (direct, no retail markup)
Warranty: Lifetime
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