Best Monoculars For Surveillance - Up to 35mm Lens Diameter

The main consideration when selecting a monocular are the magnification level and objective lens diameter, which determine the optical capabilities of the monocular. The bigger the objective lens diameters, the better the image quality and the heavier the monocular may get. Waterproofing and night vision (thermal or infrared) are also important factors to consider when selecting a monocular.

The main consideration when selecting a monocular are the magnification level and objective lens diameter, which determine the optical capabilities of the monocular. The bigger the objective lens diameters, the better the image quality and the heavier the monocular may get. Waterproofing and night vision (thermal or infrared) are also important factors to consider when selecting a monocular.

Monoculars for surveillance should be small but still offer good performance. Consider choosing a maximum magnification of 10x and an objective lens diameter of not more than 42mm. An 8x42 monocular weighs about 1.5 lbs. (0.7 kg) and a 10x25 one weighs about 0.75 lbs. (350 grams).

Monoculars for surveillance should be small but still offer good performance. Consider choosing a maximum magnification of 10x and an objective lens diameter of not more than 42mm. An 8x42 monocular weighs about 1.5 lbs. (0.7 kg) and a 10x25 one weighs about 0.75 lbs. (350 grams). Read More

Compact monoculars with an objective length diameter of less than 35mm are very small and lightweight. They are ideal for backpacking, theater shows, and sports event. For nature viewing, consider at least 35mm diameter, but if you need a really light monocular, try the 25mm size.

Compact monoculars with an objective length diameter of less than 35mm are very small and lightweight. They are ideal for backpacking, theater shows, and sports event. For nature viewing, consider at least 35mm diameter, but if you need a really light monocular, try the 25mm size. Read Less