Corvane Lark 15x50 binoculars, with parallelogram mount
15x magnification · 50 mm objectives · 3.0° field
$249
Catalog preview. Not available for purchase.
- Package
- With parallelogram mount
- Optics
- Multi-coated optics
- Armor
- Olive rubber armor
- Edition
- 2024 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 | With parallelogram mount |
| Optics | Multi-coated optics |
| Armor | Olive rubber armor |
| Edition | 2024 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. 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 multi-coated version suits casual scanning of the night sky as well as daytime nature viewing.
The olive armor has the same grip pattern and thickness as the other colors in the Lark line. The optics in the 2024 edition match the other years; the changes concern handling details only. 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
- 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 binocular tripod adapters rated for 1.2 kg.