- 1 x Alpen Optics Chisos 10x50 ED Binoculars
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Alpen Optics Chisos 10x50 ED Waterproof Binoculars with Roof BK4 Prisms and Magnesium Housing
- Extra-low Dispersion Glass
- Multi-Coated Roof BK4 Prisms
- 10x Magnification
- 50 mm Objective Lenses
- Magnesium Housing with textured grip
- 294ft Field of View at 1,000 yards
- 8.2ft Close-focus Distance
- 18 mm eye relief and 4.9 mm exit pupil
- Weather-ready, Waterproof Construction
- Nitrogen-purged for Fog-proof Performance
The Alpen Optics Chisos 10x50 ED Binoculars combine detailed long-distance viewing with accurate color reproduction for birdwatching, hiking, and wildlife observation. Extra-low dispersion glass reduces color fringing, while the BK4 roof prism system with PXA phase coating and fully multi-coated lenses delivers bright, high-contrast images. The 10x magnification and large 50 mm objective lenses provide extended viewing reach with increased light gathering for early morning and late evening observation.
Clear Detail and Natural Color
ED glass helps reduce chromatic aberration for sharper details and more natural colors, particularly around high-contrast subjects. PXA phase-coated BK4 prisms improve image contrast, while fully multi-coated optics support efficient light transmission. Together, these optical features make it easier to identify birds, wildlife, and distant landscape details.
Versatile Viewing from Near to Far
With a 294 feet field of view at 1,000 yards, the Chisos 10x50 ED provides room to scan outdoor scenes and follow moving subjects. Its 8.2 feet close focus also allows detailed observation of nearby birds, butterflies, and other small subjects. Twist-up eyecups and 18 mm eye relief support comfortable viewing with or without eyeglasses.
Built for Changing Outdoor Conditions
The magnesium housing combines durability with a manageable 907 g weight, while the textured grip helps maintain secure handling. Waterproof construction and nitrogen purging prevent internal fogging as weather and temperatures change. The compact roof prism design makes these binoculars a practical companion for extended outdoor observation.
| Magnification | 10x |
| Waterproof | Yes |
| FOV at 1000 yds | 294 ft |
| Coatings | FMC |
| Apparent FOV | 8.2 degrees |
| Eye Relief | 18mm |
| Exit Pupil | 4.9mm |
| Prism | Roof BK4 |
| Close Focus | 8.2 ft |
| Eyecup Type | Twist-Up |
| Weight | 907g |
Starting at $20.83/mo
Estimated over 12 months with Affirm, subject to eligibility and approval.
Flexible payment options available
Interest-free installments and monthly financing may be available through Shop Pay on eligible purchases.
Starting at $62.50
No interest if paid in full by the promotional terms. Minimum monthly payments required and subject to credit approval.
Shipping Policy
Orders of $25 or more qualify for free standard shipping on eligible items.
Most in-stock orders placed before 3PM EST Monday–Friday ship the same business day. View Shipping Policy
Free Local Pickup
Please call for store stock availability. Requests made before 2:30 PM EST can be available for next-day pickup. Learn more
Tab: Frequently Asked Questions
How do I return an item?
How do I return an item?
Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
Will I receive a full refund when I return an item?
Will I receive a full refund when I return an item?
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges.
How many days do I have to make a return?
How many days do I have to make a return?
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days.
My item was damaged in transit. How do I place a return?
My item was damaged in transit. How do I place a return?
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact support@focuscamera.com with your order number and a description of the damage.
There’s an issue with my order, what should I do?
There’s an issue with my order, what should I do?
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at support@focuscamera.com, or send us a message here.
Can I exchange an item?
Can I exchange an item?
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead.
If I ordered a kit, do I have to return all the items?
If I ordered a kit, do I have to return all the items?
If you ordered a kit, you must return all components and accessories to receive a full refund.
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund.
Do you offer repairs?
Do you offer repairs?
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900.
What is your return policy?
What is your return policy?
Most items can be returned within 30 days for a full refund. Click here to read our full return policy.
