The main purpose of the Sturman binoculars 7-21x40
Binoculars with variable magnification Sturman 7-21x40 is a pancratic binoculars and can be used to conduct surveillance in the city or outdoors, for example while hunting or sports.
The main characteristics of the Sturman binoculars 7-21x40
- Magnification range from 7x to 21x, aperture 40 mm high-aperture lenses
- Porro prism, lenses with multi-layer anti-reflective coating
- Adjustment interpupillary distance Central focusing, diopter correction
- Rubber-coated housing made of aluminum alloy, rubber eyecups
- Mounted on a tripod (tripod socket ¼ inch) using adapter (not included in scope of delivery)
- Comes complete with protective covers lenses and eyepieces, a strap and a storage case. Tripod adapter sold separately
Design features Sturman binoculars 7-21x40
Shockproof case binoculars Sturman 7-21x40 made of alloys of aluminium, resistant to deformation and extreme temperatures. Non-slip rubber coating plays the role of additional protection from mechanical damage and provides a good grip. The use of inversion system based on Porro prisms allows to obtain three-dimensional contrast image with minimal loss of light. To enhance the brightness and contrast on the lens surface applied multi-layer coating.
Thanks to ground the mechanism of the binoculars occurs a smooth change of magnification range from 7x to 21x, respectively, changing the value of parameters such as the diameter of the exit pupil, aperture and field of view. When minimum multiplicity 7x is the most convenient to carry out an overall review and search for objects, with a maximum ratio 21x – to drill the selected objects.
For convenient adjustment adjustable inter-pupillary distance, guidance of field through the mechanism of Central focusing and diopter correction in the right eyepiece. Please note that after each change of the zoom, you need to spend a refocusing of the image.
Binoculars Sturman 7-21x40 weighs around 0.8 kg, which makes it difficult for a long period of observation with it. Therefore, for easy operation and reduce hand shake recommend installing the instrument on the tripod using a special adapter (not included in scope of delivery) diameter tripod socket ¼ in.
Package Sturman binoculars 7-21x40
Comes complete with protective covers lenses and eyepieces, a strap and a storage case. Tripod adapter available separately.
Experts of our online store will provide the most complete information about the main characteristics and design features of the binoculars Sturman 7-21x40. Post your question on the website or call us at (495) 989-10-56.
Technical characteristics of the Sturman binoculars 7-21x40
7 - 21
Effective Lens Diameter, mm
Exit Pupil Diameter, mm
The 5.7 and 1.9
The removal of exit pupil, mm
32,5 – 3,61
Field of View, deg
Apparent field of view, deg
Field of View at 1000m, m
The solution, "
Tripod socket 1/4"
Unit weight, kg
Overall dimensions, mm
185 x 150 x 55
Country of Origin
|Lens diameter (mm)||40|
|Magnification||7 — 21|
|Field of view (deg)||2.5 — 4.4|
|Field of view (m/1000m)||43.6 — 76.8|
|Exit pupil diameter (mm)||1.9 — 5.7|
|Eye Relief (mm)||15|
|Close focus (m)||8|
|Optical designs||Porro prism|
|Case material||aluminum alloy|
|The coverage of the case||rubber|
|Tripod socket 1/4"||Yes|
|Country of origin||China|
|Manufacturer's warranty (years)||0.5|
|Dimensions (mm)||185 × 150 × 55|
|Package dimensions, place 1 (mm)||195 × 170 × 80|
|Net weight (kg)||0.74|
|Gross weight 1 (kg)||1.12|