Butler Creek Flip-Open Eyepiece Cover, Black Polymer, Size 13 (1.57"/39.90mm)

A Butler Creek flip-open eyepiece cover keeps your scope's lens protected when it matters most—during a hunt, match, or range session where seconds count. This Size 13 eyepiece cover (1.57"/39.90mm) is purpose-built to seal out dust, moisture, and debris without slowing you down. The fast flip-open design lets you transition from protected to ready in a single motion, and the silent spring hinges won't alert game to your presence.

The black polymer construction is lightweight—less than an ounce—so it won't add noticeable weight or bulk to your optic setup. Butler Creek engineered these covers to handle extreme field conditions, including temperatures down to –40°F, so you can count on reliable protection whether you're hunting in cold weather or working in dusty terrain. The friction-mount design grips your scope securely without requiring tools or modifications.

Built-in ambidextrous operation means it works just as well for left or right-eye shooters. The semi-O-ring seal creates an air-tight fit that keeps your lens clean and clear, which translates directly to better optics when you need them. If you run spotting scopes in the field, Butler Creek makes covers for those too, so you can protect your entire glass collection with the same proven design.

Key Features

• Fast flip-open mechanism for quick access to your scope lens
• Silent spring hinges designed not to spook game
• Friction-mount design anchors securely without tools
• Semi-O-ring seal creates air-tight, water-tight protection
• Tested to –40°F for extreme-condition reliability
• Weighs less than an ounce
• True ambidextrous operation
• Black polymer construction

Specifications

Frequently Asked Questions

How do I know if Size 13 is the right fit for my scope?

Size 13 covers optics with 1.57"/39.90mm eyepieces. Check your scope's eyepiece diameter and match it to this specification. Butler Creek offers multiple sizes, so if this isn't your size, you can find the correct cover for your scope.

Can I use this eyepiece cover on spotting scopes?

Yes. Butler Creek makes these flip-open covers for spotting scopes as well as rifle scopes, so if you use the same eyepiece diameter on multiple optics, one cover can protect multiple pieces of glass.

Will the spring hinges make noise or spook game?

No. Butler Creek specifically engineered silent spring hinges so the cover won't alert game when you flip it open. The design is built around the realities of hunting.

Does this cover require any tools or permanent installation?

No. The friction-mount design grips your scope's eyepiece securely with no tools, modifications, or permanent attachments. Installation and removal are quick and reversible.