---
product_id: 441836547
title: "42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC)"
brand: "generic"
price: "S$30"
currency: SGD
in_stock: true
reviews_count: 8
category: "Generic"
url: https://www.desertcart.sg/products/441836547-42mm-binocular-monocular-objective-lens-caps-internal-diameter-51-8
store_origin: SG
region: Singapore
---

# Fits 51.8-53.3mm barrels Durable flexible rubber Scratch & weather protection 42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC)

**Brand:** generic
**Price:** S$30
**Availability:** ✅ In Stock

## Summary

> 🖤 Keep your lenses flawless—because your view deserves the best.

## Quick Answers

- **What is this?** 42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC) by generic
- **How much does it cost?** S$30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/441836547-42mm-binocular-monocular-objective-lens-caps-internal-diameter-51-8)

## Best For

- generic enthusiasts

## Why This Product

- Trusted generic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight & Compact:** Adds minimal bulk and weight, maintaining your gear’s sleek profile and portability.
- • **All-Weather Lens Shield:** Protects your optics from rain, dust, and scratches—perfect for every adventure and commute.
- • **Premium Flexible Rubber:** High-quality material stretches for a secure fit without compromising durability or ease of removal.
- • **Precision Fit for 42mm Lenses:** Snugly fits barrels between 51.8-53.3mm, including popular 8x42, 10x42, and 12x42 models.
- • **Tethered Design for Convenience:** Caps stay attached and hang out of the way when in use—never lose your lens cover again.

## Overview

This 42mm binocular/monocular lens cap set fits barrels measuring 51.8-53.3mm, offering a snug, flexible rubber cover that protects lenses from scratches, dust, and weather. Designed for popular 42mm models and some scopes, these tethered caps stay attached and hang down when in use, combining durability with convenience for professionals who demand reliable gear protection.

## Description

【Measuring】Please measure the Outside diameter (including armouring) of the barrels to get accurate sizing, if the tubes outer diameter is between 51.8-53.3mm, it will fit perfect. If the diameter is different, please choose a different size. 【Fits Models】Fits most 42mm models including 8x42, 10x42 and 12x42. These covers also fit several binoculars / monoculars with objective lenses between 40-44mm as well as some scopes. 【Protection】These covers protect your lenses from rain, dust and scratches in any weather or environment. They also offer protection to your lenses in transit and storage. 【Easy to Remove / Add】Place the lens covers on the outside barrel of your binocular/monocular to protect your lenses. Covers remain attached to the binocular barrel and hang down when in use. 【Design】High quality flexible rubber is independently tethered and stretches for a tight fit. This ensures optimal protection for each lens.

Review: Good quality and Snug Fit - Perfect fit for my Swarovski binocular objectives. These fit snugly on both objectives compared to the oems, which had stretched and constantly flopped off. I can recommend these. They seem to be good quality and stay on until you pull them off.
Review: Best size for Nikon Prostaff P3/P7 - Winner: 51.8-53.3mm - If you're like me, you might be wondering... Do I get the 50.5-51.8mm or the 51.8-53.3mm. Well after trying both I can say definitely get the 51.8-53.3mm. Because the Prostaff P3/P7 has a thick rubber armor the smaller of the two was too tight, you almost have to force it a little around the lens. With the 51.8-53.3 you just push it in and it fits perfectly snug, not loose or too tight. The quality of these is fairly good. I was worried they'll be too much flex on the cap but it has a nice balance between flex and stiffness. I would prefer it to be a slightly stiffer/harder but it's still good the way it is. The edges are cut perfectly smooth. One noticeable thing I like is when the cap is off, it goes straight down and out of the way of the viewing lens as shown in the photo. Definitely recommend.

## Features

- 【Measuring】Please measure the Outside diameter (including armouring) of the barrels to get accurate sizing, if the tubes outer diameter is between 51.8-53.3mm, it will fit perfect. If the diameter is different, please choose a different size.
- 【Fits Models】Fits most 42mm models including 8x42, 10x42 and 12x42. These covers also fit several binoculars / monoculars with objective lenses between 40-44mm as well as some scopes.
- 【Protection】These covers protect your lenses from rain, dust and scratches in any weather or environment. They also offer protection to your lenses in transit and storage.
- 【Easy to Remove / Add】Place the lens covers on the outside barrel of your binocular/monocular to protect your lenses. Covers remain attached to the binocular barrel and hang down when in use.
- 【Design】High quality flexible rubber is independently tethered and stretches for a tight fit. This ensures optimal protection for each lens.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09RQXFD4Q |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #3 in Binocular Accessories |
| Brand | Generic |
| Coating | Scratch-Resistant |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 641 Reviews |
| Enclosure Material | Rubber |
| Exit-Pupil Diameter | 21 Millimeters |
| Eye Relief | 18 Millimeters |
| Features | Lightweight |
| Focus Type | Fixed Focus |
| Item Weight | 0.02 Kilograms |
| Magnification Maximum | 12 x |
| Manufacturer | Stealth Birding Limited |
| Objective Lens Diameter | 42 Millimeters |
| Size Map | Compact |
| Special Feature | Lightweight |
| Water Resistance Level | Water Resistant |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Generic
- **Magnification Maximum:** 12 x
- **Objective Lens Diameter:** 42 Millimeters
- **Special Feature:** Lightweight

## Images

![42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC) - Image 1](https://m.media-amazon.com/images/I/71P4MkF6dFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality and Snug Fit
*by J***3 on December 30, 2025*

Perfect fit for my Swarovski binocular objectives. These fit snugly on both objectives compared to the oems, which had stretched and constantly flopped off. I can recommend these. They seem to be good quality and stay on until you pull them off.

### ⭐⭐⭐⭐⭐ Best size for Nikon Prostaff P3/P7 - Winner: 51.8-53.3mm
*by J***G on August 11, 2025*

If you're like me, you might be wondering... Do I get the 50.5-51.8mm or the 51.8-53.3mm. Well after trying both I can say definitely get the 51.8-53.3mm. Because the Prostaff P3/P7 has a thick rubber armor the smaller of the two was too tight, you almost have to force it a little around the lens. With the 51.8-53.3 you just push it in and it fits perfectly snug, not loose or too tight. The quality of these is fairly good. I was worried they'll be too much flex on the cap but it has a nice balance between flex and stiffness. I would prefer it to be a slightly stiffer/harder but it's still good the way it is. The edges are cut perfectly smooth. One noticeable thing I like is when the cap is off, it goes straight down and out of the way of the viewing lens as shown in the photo. Definitely recommend.

### ⭐⭐⭐⭐⭐ good product for the price point.
*by D***. on January 18, 2026*

Fits perfectly.

## Frequently Bought Together

- 42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC)
- 40.7-42mm Binocular Rainguard/Eyepiece/Eyecup Cover/Dustguard/Eye Guard Cap Rubber Black, 40.7-42RG
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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-19*