Corvane Sedge 20x41 binoculars
20x magnification · 41 mm objectives · 2.8° field
$239
Catalog preview. Not available for purchase.
- Package
- Binoculars only
- Optics
- ED glass, fully multi-coated
- Armor
- Desert tan armor
- Edition
- 2023 edition
Specifications
| Magnification | 20x |
|---|---|
| Objective diameter | 41 mm |
| True field of view | 2.8° |
| Exit pupil | 2.1 mm |
| Dawes limit | 2.83 arcsec |
| Limiting magnitude | 10.1 |
| Eye relief | 15 mm |
| Close focus | 10.0 m |
| Prisms | BaK-4 roof |
| Weather sealing | Not sealed |
| Weight | 1,150 g |
| Package | Binoculars only |
| Optics | ED glass, fully multi-coated |
| Armor | Desert tan armor |
| Edition | 2023 edition |
Description
The Sedge 20x41 binoculars pair 20x magnification with 41 mm objectives, which gives an exit pupil of about 2.1 mm. The true field of 2.8 degrees produces an apparent field of about 56 degrees, so the view stays wide enough to locate targets from a star chart. At this magnification, small movements of the hands show as a shaking image, so most observers use a tripod or a parallelogram mount instead of holding the binoculars by hand.
Before the first session, set the interpupillary distance and focus on a distant object in daylight. After dark, begin with the Moon near the terminator, where crater rims cast long shadows across the surface. Next, move to the Beehive Cluster in Cancer and the Double Cluster in Perseus, both of which fit within the field. Allow your eyes ten to fifteen minutes to adjust to the dark before judging faint detail. The 15 mm eye relief lets observers who wear glasses see the full field, and the rubber eyecups fold down for that use.
At 1,150 g, these binoculars are too heavy for steady hand-held use over long periods. Mount them on a tripod or a parallelogram harness rated for at least 1.5 kg, and carry them by the body rather than the central hinge. Allow the binoculars to reach the air temperature before use, since condensation on cold lenses reduces contrast. The 10.0 m close focus lets you check focus on nearby objects in daylight before dark. The binoculars are not sealed, so keep the objective caps on between sessions and store them in the soft case to limit dust on the prisms and lens surfaces. Clean the lenses with the supplied cloth only.
About this configuration
This listing covers one configuration of the Corvane Sedge 20x41 binoculars, defined by its package, optical coatings, armor color, and edition year. Binoculars alone suit hand-held scanning of the Milky Way, bright star clusters, and the phases of the Moon. If you later want steadier views, the tripod socket between the barrels accepts a standard L-shaped adapter. The ED version adds low-dispersion glass and full multi-coating for sharper star images toward the edge of the field.
Desert tan armor stays cooler in direct sunlight, which helps during daytime use before an evening session. This is the 2023 edition of the Sedge line, the earliest version that is still listed in the catalog. The magnification, field, and exit pupil figures in the specifications table apply to every configuration of the Sedge line.
What's in the box
- Binoculars with center hinge and neck strap
- Objective and eyepiece caps
- Soft carrying case
- Lens cleaning cloth
Compatibility notes
- The central tripod socket takes a standard L-shaped binocular adapter with a 1/4-20 thread.
- Fits parallelogram mounts and harnesses rated for at least 1.5 kg.