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Vortex Defender Flip Cap - Objective Lens O-40 (45.5-48.5 mm)
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$29.99
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SKU: O-40-875874008441
Overview
This objective lens flip cap is made for protecting compatible 45–48 mm optics when they are not in use. It offers a simple way to keep the lens covered during transport, storage, and time in the field without adding unnecessary bulk. The black finish keeps the look understated, and the fit range makes it a practical accessory for hunters who want a straightforward lens cover for select Vortex setups.
Why Hunters Choose the Vortex
Fits Objective
Lenses in the 45.5–48.5 mm
Flip-cap Design
Helps keep the lens covered
Black Finish
Low-profile look
Simple Accessory
For protecting compatible optics during
Made Vortex,
Recognized optics brand
Key Features
- Vortex Defender Flip Cap for objective lenses in the 45.5–48.5 mm range.
- Black finish for a low-profile look on compatible optics.
- Designed as an objective lens flip cap accessory.
- Vortex O-40 model identification for product matching.
- Retailer-listed fitment range: 45–48 mm lens size.
Best Used For
- Hunters needing a simple objective lens cap for 45–48 mm optics
- Field users wanting added lens protection during transport and storage
- Shooters who prefer a low-profile black flip cap on their scope
- Outdoor enthusiasts looking for a straightforward Vortex accessory fit
Specifications
| Color | Black |
|---|---|
| Lens Fit | 45-48mm Lens |
| Model | O-40 |
| Objective Lens Size | 45.5-48.5 mm |
| Product Type | Defender Flip Cap |
| Upc | 875874008441 |
Pros
- Fits objective lenses in the 45.5–48.5 mm range
- Flip-cap design helps keep the lens covered when not in use
- Black finish offers a low-profile look
- Simple accessory for protecting compatible optics during transport
- Made by Vortex, a recognized optics brand
Considerations & Trade-offs
- Sized for 45–48 mm objective lenses, so fit depends on the exact outside diameter of your optic rather than the scope model name alone.
- This is a lens cap accessory, so it adds protection and convenience but does not change the optic’s performance or handling.
- The black finish is straightforward and functional, but it is a simple utility accessory rather than a low-profile integrated scope feature.
Suggested Comparisons
- Flip-up scope caps
- Scope lens covers
- Optics protection accessories
Suggested Accessories
- Lens cleaning cloth
- Lens cleaning brush
- Optics case
- Protective lens cover
Frequently Asked Questions
What lens size is the Vortex Defender Flip Cap O-40 made for?
It is listed for 45-48 mm objective lenses.
Is this cap intended for the objective lens or the eyepiece?
The product title identifies it as an objective lens cap.
What color is this flip cap?
It is listed in black.
Does the product data include any details about materials or weather protection?
No. The provided product data does not specify materials or any weather-protection claims.
Will this fit a specific scope model?
The data only gives the lens-size range, not compatibility with any specific scope model.