Corvane Sedge 20x41 binoculars, with parallelogram mount
20x magnification · 41 mm objectives · 2.8° field
$459
Catalog preview. Not available for purchase.
- Package
- With parallelogram mount
- Optics
- ED glass, fully multi-coated
- Armor
- Slate gray armor
- Edition
- 2025 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 | With parallelogram mount |
| Optics | ED glass, fully multi-coated |
| Armor | Slate gray armor |
| Edition | 2025 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
All configurations of the Corvane Sedge 20x41 binoculars share the same magnification and objective size; the options below change the package and finish. The parallelogram mount keeps the binoculars at eye level while you move them across the sky in smooth arcs. A parallelogram mount lets observers of different heights share the same view without aiming the binoculars again. The ED version adds low-dispersion glass and full multi-coating for sharper star images toward the edge of the field.
The slate gray finish makes the binoculars easier to find on a dark table than the black armor does. The 2025 edition keeps the same optical figures as the earlier years of the Sedge line. Compare the exit pupil in the specifications with your sky conditions and your age, since both affect how bright the view looks.
What's in the box
- Binoculars with center hinge and neck strap
- Objective and eyepiece caps
- Soft carrying case
- Lens cleaning cloth
- Parallelogram mount with counterweight
- Tripod adapter
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.