Corvane Lark 15x50 binoculars
15x magnification · 50 mm objectives · 3.0° field
$219
Catalog preview. Not available for purchase.
- Package
- Binoculars only
- Optics
- ED glass, fully multi-coated
- Armor
- Desert tan armor
- Edition
- 2025 edition
Specifications
| Magnification | 15x |
|---|---|
| Objective diameter | 50 mm |
| True field of view | 3.0° |
| Exit pupil | 3.3 mm |
| Dawes limit | 2.32 arcsec |
| Limiting magnitude | 10.5 |
| Eye relief | 15 mm |
| Close focus | 8.5 m |
| Prisms | BaK-4 Porro |
| Weather sealing | Not sealed |
| Weight | 1,100 g |
| Package | Binoculars only |
| Optics | ED glass, fully multi-coated |
| Armor | Desert tan armor |
| Edition | 2025 edition |
Description
The Lark 15x50 is a Porro-prism binocular with 50 mm objectives and 15x magnification. The pairing gives an exit pupil of about 3.3 mm and a true field of 3.0 degrees, which is an apparent field of about 45 degrees. At this power the view is closer to a small telescope than to a wide-field hand-held glass, and the 50 mm objectives collect enough light to show double stars and open clusters under a dark sky.
The higher magnification shows hand tremor more clearly than the lower-power models in this line. Rest the binoculars on a tripod through the central socket, or brace your elbows on a wall or a car roof. With steady support, the Double Cluster in Perseus, the Beehive Cluster in Cancer, and the star fields of Sagittarius along the Milky Way fill the narrow view. On the Moon, the crater rims and the shadow line along the terminator show clearly when the air is still.
The BaK-4 Porro prisms and the multi-coated lenses reduce light loss inside the barrels, but the bodies are not sealed. Keep the instrument dry and out of direct sun between sessions, and wipe the objectives after dew forms. The 15 mm eye relief is shorter than the 22 mm of the Lark 7x50, so observers who wear glasses may find that part of the field is blocked; fold the rubber eyecups down to hold the eye at the correct distance. The 1,100 g weight is manageable for short sessions, and the focus wheel and right-eye diopter adjust smoothly.
Begin with the Moon a few days after new, then move to the Double Cluster and the Beehive Cluster on a dark night. Note how many stars you can count in each cluster, and return on a later night to compare the results.
About this configuration
The Corvane Lark 15x50 binoculars comes in several configurations, and the notes below explain what this particular combination includes. This package contains the binoculars with their strap, lens caps, and case, without any mounting hardware. If you later want steadier views, the tripod socket between the barrels accepts a standard L-shaped adapter. ED glass reduces the color fringing that otherwise appears around bright objects such as the Moon and Venus.
Desert tan armor stays cooler in direct sunlight, which helps during daytime use before an evening session. The 2025 edition keeps the same optical figures as the earlier years of the Lark line. The magnification, field, and exit pupil figures in the specifications table apply to every configuration of the Lark line.
What's in the box
- Binoculars with neck strap
- Objective and rain guard 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 binocular tripod adapters rated for 1.2 kg.