1. Product Overview
The Celestron UpClose G2 8x40 Porro Binocular is designed for clear and comfortable viewing across various activities, from birdwatching to sporting events. Its robust construction and advanced optics provide a reliable viewing experience.
1.1 Key Features
- Multi-Coated Optics: Enhances light transmission for brighter, sharper images with improved contrast.
- BK-7 Porro Prisms: Delivers high-quality images with excellent resolution.
- 8x Magnification: Brings distant objects 8 times closer.
- 40mm Objective Lenses: Gathers ample light for clear views, even in lower light conditions.
- Rugged Aluminum Body: Lightweight yet durable construction.
- Water-Resistant Rubber Armor: Provides protection against the elements and a secure, non-slip grip.
- Ergonomic Thumb Indents: Designed for comfortable and stable handling.
1.2 What's in the Box
- Celestron UpClose G2 8x40 Porro Binocular
- Soft Carrying Case
- Objective Lens Covers
- Eyepiece Covers
- Neck Strap
- Lens Cleaning Cloth
Image 1.1: The Celestron UpClose G2 8x40 Porro Binocular, showcasing its compact and ergonomic design.
2. Getting Started
2.1 Unpacking and Initial Inspection
Carefully remove all items from the packaging. Inspect the binocular and accessories for any signs of damage. If any items are missing or damaged, contact Celestron customer support.
2.2 Attaching the Neck Strap
- Thread the ends of the neck strap through the strap lugs located on each side of the binocular body.
- Secure the strap by threading it back through the buckle, ensuring it is tightly fastened to prevent accidental drops.
2.3 Adjusting Eyecups
The UpClose G2 8x40 features soft folding eyecups. For users without eyeglasses, fold the eyecups down to achieve the full field of view. If you wear eyeglasses, keep the eyecups in the up position to maintain proper eye relief.
Image 2.1: The binocular alongside its included carrying case and neck strap, ready for assembly.
3. Operation
3.1 Interpupillary Distance Adjustment
The interpupillary distance (the distance between the centers of your pupils) varies from person to person. To set the correct interpupillary distance for your binocular:
- Hold the binocular up to your eyes and look through them.
- Move the two halves of the binocular closer together or farther apart until you see a single, clear circular field of view.
3.2 Focusing
The binocular uses a center focus wheel and a right diopter adjustment for precise focusing.
- Choose an object to view approximately 50 yards (45 meters) away.
- Cover the right objective lens (the large lens at the front) with your hand.
- Look through the binocular with your left eye and rotate the center focus wheel until the image is sharp.
- Uncover the right objective lens and cover the left objective lens.
- Look through the binocular with your right eye and rotate the right diopter ring (located on the right eyepiece) until the image is sharp.
- The binocular is now adjusted for your eyes. You can now use the center focus wheel for general focusing.
Image 3.1: Close-up view of the binocular's central focus wheel and the right eyepiece diopter adjustment ring.
4. Care and Maintenance
4.1 Cleaning the Lenses
Proper cleaning of the binocular lenses is crucial for maintaining optical performance. Always use the provided lens cleaning cloth or a soft, lint-free cloth specifically designed for optics.
- Gently brush away any dust or loose debris from the lens surfaces using a soft brush or compressed air.
- Apply a small amount of optical lens cleaning fluid to the cloth, not directly to the lens.
- Wipe the lens surface in a circular motion, starting from the center and moving outwards.
- Avoid excessive pressure, which can scratch the lens coatings.
Note: Never use abrasive cloths, paper towels, or household cleaners, as these can damage the optical coatings.
4.2 Storage
When not in use, store your binocular in its protective carrying case in a cool, dry place. Avoid exposing the binocular to extreme temperatures or high humidity for extended periods.
Image 4.1: The binocular shown with a lens cleaning cloth, emphasizing proper care.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Image is blurry or out of focus. | Improper focus adjustment. | Adjust the center focus wheel and diopter ring as described in Section 3.2. |
| Seeing two overlapping images. | Interpupillary distance is incorrect. | Adjust the binocular halves until a single circular field of view is achieved (Section 3.1). |
| Dark edges or vignetting in the view. | Eyecups are not correctly positioned for your eyes. | Adjust eyecups (folded down for non-eyeglass wearers, up for eyeglass wearers). |
| Dust or smudges on lenses. | Lenses require cleaning. | Clean lenses carefully following instructions in Section 4.1. |
6. Specifications
- Model: UpClose G2 8x40 Porro Binocular
- Model Number: 71252
- Magnification: 8x
- Objective Lens Diameter: 40 mm
- Prism Type: Porro (BK-7)
- Optical Coatings: Multi-Coated
- Field of View: 430 ft at 1000 yards (143 m at 1000 m)
- Exit Pupil: 5 mm
- Eye Relief: 12 mm
- Close Focus: 23 ft (7 m)
- Water Resistance: Water-resistant
- Weight: 1.5 lbs (0.68 kg)
- Dimensions: 7.5 x 6 x 2.5 inches (19.05 x 15.24 x 6.35 cm)
7. Warranty and Support
7.1 Limited Lifetime Warranty
Your Celestron UpClose G2 8x40 Porro Binocular is backed by a Limited Lifetime Warranty. This warranty covers defects in materials and workmanship for the lifetime of the product. Please refer to the official Celestron website or contact customer service for full warranty terms and conditions.
7.2 Technical Support
Celestron provides unlimited access to technical support from a team of US-based experts. For assistance with product setup, operation, or troubleshooting, please visit the Celestron support website or contact their customer service department directly.
Celestron Support: www.celestron.com/pages/technical-support
