Corvane Sedge 20x40 binoculars, with tripod adapter
20x magnification · 40 mm objectives · 2.5° field
$129
Catalog preview. Not available for purchase.
- Package
- With tripod adapter
- Optics
- Multi-coated optics
- Armor
- Olive rubber armor
- Edition
- 2024 edition
Specifications
| Magnification | 20x |
|---|---|
| Objective diameter | 40 mm |
| True field of view | 2.5° |
| Exit pupil | 2.0 mm |
| Dawes limit | 2.90 arcsec |
| Limiting magnitude | 10.0 |
| Eye relief | 14 mm |
| Close focus | 10.0 m |
| Prisms | BaK-4 Porro |
| Weather sealing | Not sealed |
| Weight | 1,100 g |
| Package | With tripod adapter |
| Optics | Multi-coated optics |
| Armor | Olive rubber armor |
| Edition | 2024 edition |
Description
The Sedge 20x40 is a Porro-prism binocular with 40 mm objectives and 20x magnification. The exit pupil is 2 mm, which keeps the image bright enough for the Moon, bright planets, and double stars. At 20x the true field is 2.5 degrees, about five times the diameter of the full Moon, so you see a small part of the sky at a time.
Magnification this high shows every hand tremor, so use a tripod with a standard binocular adapter, or rest the binoculars on a fence post or car roof. Scan the Orion Nebula, the Double Cluster in Perseus, and the Beehive Cluster in Cancer. Near first quarter, follow the terminator, where crater rims cast long shadows. The narrow field makes objects slower to find, so start with a bright star you can identify, then move the binoculars in small steps.
The BaK-4 Porro prisms and the central focus wheel adjust quickly. The binoculars are not sealed, so keep them out of dew and store them in the soft case when the optics are damp. The 14 mm eye relief suits observers who remove their glasses. Observers who wear glasses may see a reduced field edge, so check the view with glasses on before a session.
At 1100 g, the Sedge 20x40 is heavy to hold for long periods. Use a tripod or a binocular harness, and set the right-eye diopter on a bright star before you focus with the central wheel. The 10 m close focus also allows viewing nearby terrestrial subjects.
About this configuration
The Corvane Sedge 20x40 binoculars comes in several configurations, and the notes below explain what this particular combination includes. The included tripod adapter lets you fix the binoculars to a photo tripod for steadier, more relaxed views. With the adapter on a tripod, hand shake disappears, which makes faint stars and close double stars easier to see. Multi-coated optics reduce reflections at the main glass surfaces while keeping the price of this binocular low.
The olive armor has the same grip pattern and thickness as the other colors in the Sedge line. This is the 2024 edition, which revised the focus wheel and the strap attachment points of the Sedge line. Before you add a mount or adapter later, check the compatibility notes for the thread and fitting that this binocular uses.
What's in the box
- Binoculars with neck strap
- Objective and eyepiece caps
- Soft carrying case
- Lens cleaning cloth
- 1/4-20 tripod adapter
- L-shaped tripod adapter
Compatibility notes
- The central tripod socket takes a standard L-shaped binocular adapter with a 1/4-20 thread.
- Fits binocular harnesses rated for 1.2 kg.