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Rifle Scope Water Resistance: What To Look For

A riflescope is a critical accessory for any serious shooter or hunter that wants to enhance accuracy and target acquisition. When it comes to using a riflescope in outdoor environments, encountering wet or damp conditions is inevitable. Whether it’s rain, fog, or high humidity, water can pose a significant risk to the performance and durability of a scope. That’s where the importance of water resistance comes into play. 

A water resistant rifle scope is designed to withstand exposure to moisture and provide reliable performance even in adverse weather conditions. But what factors should one consider when choosing a water resistant riflescope? In this article, we will delve into the key factors to consider in selecting a water resistant rifle scope. By understanding these factors, you can make an informed decision and ensure that your scope remains reliable and effective even in wet or damp conditions. Let us get started!

What is water resistance in riflescopes?

Water resistance is the ability of a scope to withstand exposure to moisture, such as rain, fog, or high humidity, without compromising its performance or durability. A water resistant scope is designed to prevent water from seeping into the internal components of the scope, protecting it from moisture-related damage, such as fogging, corrosion, or condensation on lenses, which can impair visibility and accuracy. A water resistant optic may have features such as O-ring seals, nitrogen purging, and specialized lens coatings to create a barrier against water intrusion. 

Rifle Scope Water Resistance

The level of water resistance can vary among different scope models, with some offering basic protection against light rain while others are designed to withstand more extreme conditions, such as being submerged in water or used in heavy rainfall. Water resistance is an important factor to consider when choosing a scope, especially for outdoor shooting or hunting activities where exposure to moisture is likely to occur.

Importance of water resistance in rifle scopes

The importance of water resistance in scopes cannot be overstated. Here are some key reasons why water resistance is crucial in an optic:

Optical Performance

Water can cause lenses to fog up or accumulate condensation, which can significantly degrade the clarity and visibility of the scope, leading to reduced accuracy and compromised shooting performance. A water resistant scope with appropriate lens coatings and fog-proofing measures can help ensure that the optics remain clear and provide a crisp sight picture, even in wet or humid conditions.

Durability and Reliability

Exposure to moisture can damage the internal components of a scope, leading to corrosion, rust, and potential malfunction. A water resistant optic with proper seals and purging can help prevent water intrusion and protect the scope from moisture-related damage, ensuring its durable and reliable performance in adverse weather conditions.

Weather Resistance

Outdoor shooting or hunting activities often take place in varying weather conditions, including rain, fog, or high humidity. A water resistant sight is designed to withstand such conditions, allowing the shooter to maintain a clear sight picture and accurate aiming even in wet or damp environments.

Longevity and Investment Protection

Riflescopes are a major investment for shooters, and protecting that investment is important. Water resistance can prolong the lifespan of your scope by preventing moisture-related damage, such as fogging or internal component failure, which can result in costly repairs or replacements.

Enhanced Versatility

A water resistant sight can provide greater versatility in various shooting scenarios, including hunting, tactical operations, or recreational shooting, where there is a high chance of exposure to moisture. Having a water resistant optic allows the shooter to confidently use the scope in a wider range of environments and weather conditions, without worrying about damage or performance degradation due to water exposure.

Rifle scope water resistance: what to look for

Optical Performance

The optical performance of a scope is a critical factor to consider, and it becomes even more crucial in wet or damp conditions where visibility can be compromised due to fog, condensation, or water droplets on the lenses. A water resistant scope should have features that ensure good image quality, even in adverse weather conditions. Here are some key considerations for optical performance:

Lens Coatings

High-quality lens coating is essential for a scope’s optical performance, and it plays a significant role in preventing fogging, reducing glare, and enhancing light transmission. Look for a scope with multiple layers of anti-reflective coatings on all air-to-glass surfaces, such as fully multi-coated (FMC) or multi-coated (MC) lenses, which can help maintain clear visibility and minimize light loss, even in wet or foggy conditions.

Fog proof Measures

Fogging of lenses can occur when there are rapid temperature changes or exposure to high humidity. To maintain the optical performance of your scope, you must have fog proof measures in place. Nitrogen or argon gas is used to replace the air inside the scope, preventing internal fogging and ensuring better image quality, even in extreme temperature or humidity changes.

Lens Diameter and Magnification

The diameter of the objective lens and the magnification range of the scope can also impact its optical performance in wet conditions. A larger objective lens diameter can allow more light transmission through the scope and increase visibility in low light or foggy conditions. Similarly, higher magnification can make it easier to see targets clearly, even in adverse weather conditions. Although, lens clarity becomes more important in high-magnification settings. However, it’s important to balance lens diameter, magnification, and other factors that can determine the optical clarity of a scope in wet conditions.

Reticle Visibility

The visibility of the reticle, or the aiming point, is crucial for accurate target acquisition. In wet or damp conditions, the reticle may become blurred or obscured by water droplets or fog. Look out for a scope with a high contrast reticle or one designed to remain clear and visible in adverse weather conditions.

Lens Cleaning and Maintenance

Proper lens cleaning and maintenance are essential for maintaining optical performance in a scope. Get a scope with user-friendly lens cleaning procedures, such as easy-to-remove lens caps, anti-smudge coatings, or lens cleaning kits, to ensure the lenses can be easily cleaned and maintained, even in wet or damp conditions.

Durability and Construction

The durability and construction of an optic are important because they determine the scope’s ability to withstand exposure to moisture, protect internal components from corrosion, and ensure reliable performance in adverse weather conditions. Here are some key considerations for durability and construction:


A good rifle scope should have effective waterproofing measures in place to prevent water intrusion. This may include O-ring seals or gaskets at critical points, such as the lens housing, turret caps, or eyepiece, to create a barrier against moisture. When searching for a scope, look for those rated with an IPX waterproofing standard, which indicates the level of protection against water, with higher ratings providing better waterproofing performance.

Shock Resistance

Every scope needs to be able to withstand the recoil and vibrations generated by the firearm when it is fired. This feature is not exempted from a water resistant scope. The scope you are choosing must have been tested and rated for shock resistance, ensuring that it can withstand the repeated impacts without losing zero or damaging internal components.

Corrosion Resistance

Exposure to moisture can lead to corrosion, rust, and damage to both internal and external components of a scope. Ensure the scope is constructed with materials that are resistant to corrosion, such as aluminum, stainless steel, or other high-quality materials, to ensure long-term durability and reliable performance, even in wet environments.

Construction Quality

The overall construction quality of a rifle scope is also needed for its durability. Look for scopes that are built with precision engineering, robust construction, and high-quality materials to ensure that they can withstand the rigors of outdoor use, including exposure to moisture, impacts, and environmental conditions.

Coating Protection

In addition to waterproofing measures, scopes may also have additional coatings or protective treatments on the exterior surfaces to enhance their durability. Check for scopes with scratch-resistant, abrasion-resistant, or impact-resistant coatings on the lens surface or external components to protect against damage from moisture, debris, or impacts.

Testing and Certification

Reliable scopes should undergo rigorous testing and be certified by independent organizations to ensure their durability and performance in adverse weather conditions. Before choosing a scope, ensure that it has been tested for water resistance, shock resistance, and corrosion resistance and is certified by reputable organizations to ensure its durability and reliability in wet environments.

Weather Resistance

Weather resistance is a crucial factor in a rifle scope. It determines the scope’s ability to perform reliably in various weather conditions, such as rain, snow, fog, humidity, and extreme temperature changes. Here are some key considerations for weather resistance:

Rainproof Performance

Rifle scope on rain

A water resistant scope should be able to withstand exposure to rain without allowing water to penetrate the internal components or affect the optical performance. Look for scopes with effective waterproofing measures that can withstand heavy rain or prolonged exposure to moisture without compromising performance.

Fogproof Performance

Fogging of the internal lenses can occur when there is a rapid change in temperature or humidity, which can affect the clarity and visibility through the scope. Ensure your scope is purged with dry gas, such as nitrogen or argon, during manufacturing to prevent internal fogging. Additionally, scopes with lens coatings that resist fogging, such as anti-fog or hydrophobic coatings, can further enhance their fog proof performance.

Snow and Ice Resistance

If you plan to use the scope in snowy or icy conditions, it’s important to consider its resistance to snow and ice buildup. Scopes with lens coatings that repel snow, ice, or water can help maintain clear visibility.

Temperature Resistance

Riflescopes can be exposed to extreme temperature changes during outdoor use, such as during early morning or late evening hunts or in harsh environments. That is why you’ll need a scope that can withstand a wide temperature range without failing. Scopes with materials that are resistant to thermal expansion or contraction and effective sealing and purging methods can help ensure reliable performance in varying temperatures.

Ease of Use

Here are some key aspects to consider in terms of ease of use for a water-resistant scope:


The scope should be designed with user-friendly ergonomics, allowing for easy and comfortable handling, adjustments, and operation. Ensure your scope has intuitive controls, such as easily accessible turrets or knobs for windage and elevation adjustment, a smooth and easy-to-operate zoom or magnification ring, and a quick and simple reticle adjustment system. Ergonomic features, such as a non-slip grip or textured surfaces, can also enhance the ease of use, especially in wet or slippery conditions.

Quick Target Acquisition

A water resistant scope should allow for quick and easy target acquisition, especially in fast-paced shooting situations. Check if the scope you’re choosing has a wide field of view, a clear and bright sight picture, and a reticle that is easy to align with the target. Features such as illuminated reticles, daylight visible markings, or high-contrast reticle designs can also aid in quick target acquisition, even in adverse weather or low light conditions.

Eye Relief and Eyebox

The eye relief and eye box refer to the distance between the ocular lens and the shooter’s eye and the area where the shooter can obtain a full sight picture. A water resistant scope should have a comfortable eye relief and a forgiving eyebox to allow for quick target acquisition and a comfortable shooting experience, even in challenging shooting positions or when wearing eyeglasses. 

User-Friendly Features

Consider additional user-friendly features that can enhance the ease of use of the rifle scope. This may include features such as a zero-reset or zero-stop function for easy zeroing and re-zeroing, a parallax adjustment for improved accuracy at different distances, a fast focus eyepiece for quick reticle focus adjustments, or a flip-up lens cover for protection against dirt, debris, or moisture. Such features can add convenience and ease of use to the scope, making it more user-friendly in the field.

Brand Reputation and Price

When considering factors for a water-resistant scope, brand reputation and price are important aspects to take into account. Here’s a closer look at these two factors:

Brand Reputation

The reputation of the brand that manufactures the rifle scope is crucial in determining the overall quality and reliability of the product. Established brands with a long history of producing high-quality optics and firearms accessories are often more reliable and trustworthy compared to lesser-known or generic brands. A reputable brand is likely to have a proven track record of delivering reliable and durable products, including water resistant scopes. Research the brand’s history, customer reviews, and feedback to assess their reputation in terms of product performance, durability, customer service, and warranty policies.


The price of a riflescope is also an important consideration. Riflescopes come in a wide range of price points, and it’s essential to balance your budget with your requirements and expectations for the rifle scope’s performance and durability. Keep in mind that higher-priced riflescopes may offer advanced features, better optical performance, and increased durability, but they may not always be necessary for everyone’s shooting needs. On the other hand, cheaper options may sacrifice certain features to keep the cost low. It’s important to determine your budget and prioritize the features that are essential to your shooting requirements while considering the long-term value and durability of the scope.

Application and Intended Use

The intended use of a scope is a crucial factor to consider when selecting the right scope for your needs. Different shooting activities and environments require different features and specifications in a scope. Here are some key points to consider:

Shooting Activity

The type of shooting activity you engage in, whether hunting, target shooting, or tactical shooting, will influence the specifications you need in a scope. For example, if you primarily use your rifle for hunting in rugged and wet environments, you will need a scope that can withstand harsh weather conditions, including rain, humidity, and temperature fluctuations. On the other hand, if you use your rifle for target shooting or competition shooting in controlled environments, the water resistance requirements may not be necessary.

Environmental Conditions

Consider the environmental conditions in which you plan to use the scope. If you frequently shoot in rainy or humid conditions, a sight with higher water resistance ratings, such as IPX-7 or IPX-8, may be necessary to ensure reliable performance. Additionally, if you often shoot in dusty or sandy environments, a scope with good dust resistance and durable construction may be required to prevent damage to the optics.

Magnification Setting

The magnification setting in the scope should align with your intended use. For long range shooting, a higher magnification scope may be necessary, while a lower magnification scope may suffice for shorter range shooting or hunting in dense woods. Consider the typical shooting distances and targets you engage with, and choose a magnification range that meets your specific needs.

Scope Reticle Type

The type of reticle or crosshair in the scope is also important, as it can impact your shooting accuracy and ease of use. Different scope reticle types, such as duplex, mil-dot, BDC, or illuminated reticles, offer different functionalities and are better suited for specific shooting applications. Consider the type of shooting you do and choose a reticle that complements your shooting style and preferences.

Mounting Compatibility

Consider the compatibility of the scope with your firearm’s mounting system. Different scopes may require different types of mounts, such as Picatinny or Weaver mounts, and it’s important to ensure that the scope you choose is compatible with your firearm’s mounting system. This will ensure a secure and stable fit, which is crucial for accurate shooting.

Maintenance and Care

Proper maintenance is needed for a water-resistant scope’s longevity and optimal performance. Here are some key points to consider:


Regularly clean the lenses, body, and other parts according to the manufacturer’s instructions. Use a lens cleaning solution and a soft cloth to clean the lenses, and use a soft brush or cloth to clean the body and other parts. Avoid using abrasive materials or harsh chemicals that can damage the optics or the scope’s body.

Waterproof Checks

Periodically check the seals and O-rings of the scope to ensure that they are intact and functioning properly. If you notice any signs of wear, damage, or deterioration, it’s important to replace them promptly to maintain the water resistance capabilities of the scope. Always ensure that the lens caps, turret caps, and other protective covers are properly secured to prevent water or debris from entering the scope.


Store the scope in a dry and cool environment when not in use. Avoid storing it in extreme temperatures or high humidity conditions, as this can affect the performance and longevity of the scope. Consider using a protective case or cover to further safeguard the scope from dust, moisture, and other potential hazards during storage or transportation.


Handle the riflescope with care to prevent accidental damage or impacts. Avoid dropping or banging the scope, and always follow safe handling practices when attaching or detaching it from your firearm. Properly mount and secure the scope to prevent any movements or shifts during shooting that can affect its performance.

Follow the Manufacturer’s Recommendations

Always follow the manufacturer’s recommendations and guidelines for maintenance and care. Different scopes may have specific requirements or limitations, and it’s important to adhere to them to ensure the best performance and longevity of the scope. Consult the user manual or contact the manufacturer directly if you have questions or concerns about maintaining your specific scope.

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