Waterproof Rangefinder

1,772 Reviews Scanned

In order to provide you with accurate and valuable pieces of information and reviews, we have conducted in-depth research for the best waterproof rangefinder of 2023. In addition, you will find our top picks and highest-reviewed products in the section below.
# Preview Product Rating
1 AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with... AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with... No ratings yet
2 Hunting Rangefinder 1000Y Waterproof Hunting Range Finder 6.5X... Hunting Rangefinder 1000Y Waterproof Hunting Range Finder 6.5X... No ratings yet
3 REVASRI Hunting Laser Rangefinder with Rechargeable Battery 1000 Yards Hunting Range Finder with... REVASRI Hunting Laser Rangefinder with Rechargeable Battery 1000 Yards Hunting Range Finder with...
4 Bushnell Golf Pro X3 Golf Laser Rangefinder, Waterproof, Slope + Elements Compensation, Locking... Bushnell Golf Pro X3 Golf Laser Rangefinder, Waterproof, Slope + Elements Compensation, Locking... No ratings yet
5 TideWe Hunting Rangefinder with Rechargeable Battery, 700Y Camo Laser Range Finder 6X Magnification,... TideWe Hunting Rangefinder with Rechargeable Battery, 700Y Camo Laser Range Finder 6X... No ratings yet
6 AOFAR HX-1200T Range Finder for Hunting Archery, 1200 Yards with Angle and Horizontal Distance,... AOFAR HX-1200T Range Finder for Hunting Archery, 1200 Yards with Angle and Horizontal Distance,... No ratings yet
7 Vortex Optics Viper HD 3000 Laser Rangefinder Vortex Optics Viper HD 3000 Laser Rangefinder
8 Leica Rangemaster CRF 2800.COM Compact Laser Rangefinder (40506), Black Leica Rangemaster CRF 2800.COM Compact Laser Rangefinder (40506), Black
9 OWLNV Night Vision Digital Rifle Scope, HD Day & Night Hunting Riflescope Monocular with... OWLNV Night Vision Digital Rifle Scope, HD Day & Night Hunting Riflescope Monocular with...
10 AOFAR HX-800I Hunting Range Finder 800 Yards,6X Magnification, Waterproof Archery Rangefinder for... AOFAR HX-800I Hunting Range Finder 800 Yards,6X Magnification, Waterproof Archery Rangefinder for...
11 Vortex Optics Ranger 1800 Laser Rangefinder , Black Vortex Optics Ranger 1800 Laser Rangefinder , Black
12 USCAMEL 10X50 Marine Binoculars for Adults with Rangefinder Compass, Waterproof Marine Binoculars... USCAMEL 10X50 Marine Binoculars for Adults with Rangefinder Compass, Waterproof Marine Binoculars... No ratings yet
13 AOFAR GX-2S Golf Rangefinder Slope On/Off, Flag-Lock with Vibration, 600 Yards Range Finder, 6X 25mm... AOFAR GX-2S Golf Rangefinder Slope On/Off, Flag-Lock with Vibration, 600 Yards Range Finder, 6X... No ratings yet
14 TIDEWE Hunting Rangefinder with 700Y Red & Green OLED Display, Built-in Magnet Multi Functional... TIDEWE Hunting Rangefinder with 700Y Red & Green OLED Display, Built-in Magnet Multi Functional... No ratings yet
15 BACK 2 BASICS GOLF | Pro Vision Golf Rangefinder with Slope, 8X Zoom, 800 Yards | Green | Waterproof... BACK 2 BASICS GOLF | Pro Vision Golf Rangefinder with Slope, 8X Zoom, 800 Yards | Green |... No ratings yet
16 Astra Optix HBX1600B 10x42 1760 Yard Laser Rangefinder Binocular for Hunting, Shooting and Golf with... Astra Optix HBX1600B 10x42 1760 Yard Laser Rangefinder Binocular for Hunting, Shooting and Golf...
17 ATN Auxiliary Ballistic Smart Laser Rangefinder w/Bluetooth, device works with Mil and MOA scopes... ATN Auxiliary Ballistic Smart Laser Rangefinder w/Bluetooth, device works with Mil and MOA scopes... No ratings yet
18 LaserWorks Range Finder for Hunter, Laser Rangefinder for Hunting with Slope, Range Finder... LaserWorks Range Finder for Hunter, Laser Rangefinder for Hunting with Slope, Range Finder...
19 KILO1600 6x22mm Waterproof Digital Ballistic Laser Rangefinder OLED SOK16608 with 2 Extra CR2... KILO1600 6x22mm Waterproof Digital Ballistic Laser Rangefinder OLED SOK16608 with 2 Extra CR2... No ratings yet
20 AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with... AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with... No ratings yet

SaleBestseller No. 1
AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with...
  • 【HIGH PRECISION FUNCTIONAL RANGEFINDER】Aofar rangefinders own advanced pin sensor technology, which is capable of obtaining six times magnified...
  • 【HUNTING RANGE FINDER】Our rangefinders measure from 5-700 yards. Distances can be obtained even in harsh environments using the rangefinder mode....
  • 【TWO MODE FOR ANY CIRCUMSTANCE】The AOFAR HX-700N rangefinder has two basic modes: Range and Speed. It is a very cost-effective rangefinder for...
  • 【LIGHTWEIGHT AND PORTABLE】The HX-700N rangefinder measures 110x75x45mm and weighs 180g. It is very light and compact, making it ideal for carrying...
  • 【RISK FREE AND FULL ACCESSORIES】 AOFAR factory direct selling with TWO year VIP and lifetime customer support. Including carrying pouch, CR2...
SaleBestseller No. 2
Hunting Rangefinder 1000Y Waterproof Hunting Range Finder 6.5X...
  • 【CAMOUFLAGE PATTERN】Realtree Xtra camouflage, a high-quality printed camouflage pattern that blends well in any hunting environment. Range finder...
  • 【MULTIPLE FUNCTIONS】Multiple functions include continuous scan modes, golf club logo lock, slope correction, speed and angle functions. The...
  • 【6.5X MAGNIFICATION】The hunting rangefinder uses upgraded technology to accurately measure distance and speed, providing a brighter, clearer image...
  • 【PORTABLE AND DURABLE】 Multicoated material, which is scratch-resistant, makes the lens durable. This hunting range finder weighs only 0.7 pounds...
  • 【BUY WITH CONFIDENCE】If you have any questions or problems with our range finders, please feel free to contact us. Our customer service team is...
SaleBestseller No. 3
REVASRI Hunting Laser Rangefinder with Rechargeable Battery 1000 Yards Hunting Range Finder with...
  • [Hunting Range Finder with Mode Memory]-This laser hunting rangefinder has 7 functions: ranging mode,all-in-one mode, scanning mode, speed measurement...
  • [Measure Multiple Targets Continuously]- In continuous scan mode, you can measure multiple targets with one press. Angle, height, horizontal and...
  • [High Accuracy and Clear View]-High accuracy 1000 Yards laser range finder with 6.5X magnification. Multilayer coated glass lens and high end...
  • [Rechargeable and Portable]- The rangefinder is equiped with rechargeable built-in Li-ion battery(not replaceable), charging is super easy. The...
  • [Technical Support]-24 hours full-time service, 1 year warranty, lifetime technical support. If you have any questions, please feel free to email us...
Bestseller No. 4
Bushnell Golf Pro X3 Golf Laser Rangefinder, Waterproof, Slope + Elements Compensation, Locking...
  • TRUE PLAY AS DISTANCE - Temperature and altitude have been added to Bushnell's patented Slope technology to give golfers the most precise compensation...
  • NEW LOCKING SLOPE-SWITCH - The locking Slope-Switch Technology lets the golfer easily switch the Pro X3 in and out of Slope mode. Pro X3 is legal...
  • DUAL DISPLAY - Allows users the ability to easily toggle between the bright red or crisp black display settings based on lighting conditions and user...
  • PINSEEKER WITH VISUAL JOLT - A red ring now flashes as JOLT vibrates to give the golfer even greater feedback and confidence to know you have locked...
  • INTEGRATED BITE MAGNETIC MOUNT - The Pro X3 features Bushnell’s integrated BITE magnetic mount that allows you to easily mount the Pro X3 right on...
SaleBestseller No. 5
TideWe Hunting Rangefinder with Rechargeable Battery, 700Y Camo Laser Range Finder 6X Magnification,...
  • 【INTEGRATED FUNCTIONS】TideWe rangefinder offers 6x magnification, and displays a straight-line vertical distance, horizontal distance, and speed...
  • 【FAST ACCURATE READING】Our rangefinder is a premium product with advanced technology that accurately ranges from 3 to 1000 yards. It provides...
  • 【LIGHTWEITH & DURABLE】The weight is only 0.35lb, which makes it compact and portable. Our rangfinder is perfect for hunting or shooting at...
  • 【EASY TO USE】You simply point the target, push a button, and you get almost instantaneous precision range data on an easy-to-read LCD display. ...
  • 【USER FRIENDLY】Equipped with 750MAH rechargeable Li-ion battery, it can measure 20000 times after a fully charge. It is built with clear LCD...
SaleBestseller No. 6
AOFAR HX-1200T Range Finder for Hunting Archery, 1200 Yards with Angle and Horizontal Distance,...
  • 【ACCURATE HUNTING RANGE FINDER】:Adopting the latest Al technology, supports bow and range two modes, dust proof, fog proof, waterproof for all...
  • 【BOW AND HUNTING MODE】:Shows angle and horizontal distance when showing straight-line distance.
  • 【HIGH PRECISION RANGEFINDER】:Upgrade pinsensor technology. Accuracy with±1 yard in 5~300Y, larger than 300 yards is +/-1 yards. Measurement up...
  • 【COMPLETE RANGE FINDER】:Including carrying pouch, CR2 battery, high-grade portable rope, carabiner, cleaning cloth and manual.
  • 【SAFETY SHOPPING EXPERIENCE】:AOFAR factory direct selling with TWO year VIP and lifetime customer support. It's Important to Share Your Shopping...
Bestseller No. 7
Vortex Optics Viper HD 3000 Laser Rangefinder
  • The Viper HD 3000 laser rangefinder with 7x magnification and a 25mm objective lens, gives you the tools to act quickly and confidently. A 3,000-yard...
  • The HD optical system uses select glass elements to deliver exceptional resolution that cuts chromatic aberration and provides outstanding color...
  • The red OLED display stays clear in low light. To give you the flexibility to range any shot on any hunt, the Viper HD 3000 has four target modes...
  • Built to handle tough situations, the rangefinder uses ArmorTek coatings to protect the lenses. Rubber armor provides a secure, non-slip grip and...
  • The included soft carry case will provide you with easy access to your rangefinder whether in the field or at the range.
Bestseller No. 8
Leica Rangemaster CRF 2800.COM Compact Laser Rangefinder (40506), Black
  • RED LED DISPLAY with automatic brightness control provides exceptionally clear and razor-sharp images and guarantees simple and reliable reading of...
  • EESY OPERATION via the new Hunting App that calculates the individual ballistic output values based on caliber, bullet type, trajectory and weigh
  • THE EXTREMELY FAST SCAN MODE captures the environment every 0.3 seconds and displays the values in decimal numbers for a precise, safe shot at any...
  • MEASURING RANGE 10 TO 2,700 YARDS and integrated BLUETOOTH CONNECTIVITY
  • WATER AND DUST PROTECTION provided with AquaDura lens coating and carbon-fiber-reinforced plastic housing
Bestseller No. 9
OWLNV Night Vision Digital Rifle Scope, HD Day & Night Hunting Riflescope Monocular with...
  • 【Ergonomic Design & Multi-Function】Rugged and steady, Compact size light-weight 565g. Bar design focus adjustment ring with locking quick-detach...
  • 【Longer Range Viewing Day & Night Mode】Full color view daytime, Black and white view nighttime, Up to 350 meters in complete darkness and 1000...
  • 【Build-in Rangefinder】Rangefinder range up to 1000m, Range your target in just 1 click and get the precise distance measurement in the blink of an...
  • 【One Shot Zeroing & 6000 J Recoil Resistance】Time to say "NO" to waste of time and ammunition, All you have to do is to move the zero reticle to...
  • 【WiFi Streaming/Video Recording】Sync to your smart device via app for wireless video streaming, HD Video recording (Resolution: 1920*1080 FULL...
Bestseller No. 10
AOFAR HX-800I Hunting Range Finder 800 Yards,6X Magnification, Waterproof Archery Rangefinder for...
  • 【MULTIPLE AND PRACTICAL MODES】:For hunting and golf with three modes:Range,Scan,and Speed.You can easily identify target with continuous scan....
  • 【ACCURATE AND FAST READING】:Press and hold the "POWER" button and move to the far or near to measure different objects, identify the target...
  • 【LIGHTWEIGHT AND ERGONOMIC DESIGN】: Ergonomic design is perfect for holding and is more light for carrying.Sizes:105x 75 x 25 mm, weight :...
  • 【ADVANCED TECHNOLOGY AND RELIABLE QUALITY】:Adopting the latest Al technology and the upgrade pinsensor technology. Measuring up to 800 yards...
  • 【TWO-YEAR WARRANTY AND FULL ACCESSORIES】:Customer service is our top priority. We provide two years VIP and lifetime customer support. Your...
Bestseller No. 11
Vortex Optics Ranger 1800 Laser Rangefinder , Black
  • The Ranger 1800 rangefinder is easy to use and features a clean, illuminated display and highly intuitive menu. The Ranger 1800 is capable of ranging...
  • The primary HCD mode displays an angle compensated distance that is ideal for the majority of hunters and shooters. An advanced LOS mode provides you...
  • A scan feature gives continuous range readings as you pan across a landscape or track a moving target. Three brightness settings allow the display to...
  • Fully multi-coated lenses deliver optimal light transmission. Textured rubber armor provides a secure, non-slip grip. Water and fogproof performance...
  • The included neck lanyard and removable utility clip make the Ranger easy to pack and keep handy. Compatible with a tripod adapter, allowing use on a...
Bestseller No. 12
USCAMEL 10X50 Marine Binoculars for Adults with Rangefinder Compass, Waterproof Marine Binoculars...
  • ✔【Marine10x50 Binoculars】:Binoculars floating with 10x magnification and 50mm large objective lens.field of view is 396 feet at 1000 yards,with...
  • ✔【High Quality BAK4 Binoculars】: High refractive BAK4 Prism eliminates the stray light and improves color reproduction to 99.99%. Green FMC...
  • ✔【Waterproof Binoculars】: Binocular come with nitrogen-filled waterproof design. O-ring sealed for complete waterproof and float on water so no...
  • ✔【Binoculars with Rangefinder & Compass】:Night vision binoculars illuminated compass built-in for direction location, with an internal...
  • ✔【Attached Binoculars with Bag and Strap】:It is easy to carry and store. Ideal For Travel, Concerts Outdoor Activities, Bird Watching, Climbing,...
SaleBestseller No. 13
AOFAR GX-2S Golf Rangefinder Slope On/Off, Flag-Lock with Vibration, 600 Yards Range Finder, 6X 25mm...
  • 【GOLF RANGEFINDER】: Measurement 5-600 yds. 5/285 yds to Flag, 5/415 yds to tree. High-definition, 6X Magnification, LCD clear display. Fast...
  • 【FLAG-LOCK TECHNOLOGY WITH VIBRATION】: Scan from far to near. After get the further object distance then move to flag. This way you will get the...
  • 【SLOPE SWITCH TECHNOLOGY】: Slope switch technology is legal for Golf Tournament. Pressing “M” button for 10 seconds to switch Slope. The...
  • 【LIGHTWEIGHT AND UNIQUE DESIGN】: Dimensions: 121x 72 x 43 mm, weight 180g. Lightweight and durable body. Starry paint pattern. Streamlined...
  • 【RISK FREE AND FULL ACCESSORIES】: Provides two years VIP and lifetime customer support. Comes with carrying pouch, free CR2 battery, high-grade...
Bestseller No. 14
TIDEWE Hunting Rangefinder with 700Y Red & Green OLED Display, Built-in Magnet Multi Functional...
  • 【RED & GREEN OLED DISPALY】TIDEWE Rangefinder has a built-in clear OLED display, which can provide a projected red and green intersecting reticle...
  • 【ADVANCED TECHNOLOGIES】Packed with featured MODES including golfing, hunting and archery; Generally, there are 3 modes available(Distance...
  • 【FAST ACCURATE READING】Our rangefinder is a premium product that accurately ranges from 3 to 700 yards; Rangefinder provides fast measurements...
  • 【PORTABLE & LIGHTWEIGHT】Rangefinder's Specs (Dimensions) are 4.12" x 2.61" x 1.50"; The rangefinder weight is only 0.36lb, which makes the...
  • 【USER FRIENDLY】The rangefinder is equipped with 750MAH rechargeable Li-ion battery, which can ensure you measure 20000 times after a full charge;...
Bestseller No. 16
Astra Optix HBX1600B 10x42 1760 Yard Laser Rangefinder Binocular for Hunting, Shooting and Golf with...
  • ULTRA-FAST RANGING: Our Standard Ranging Mode provides accurate and ultra-fast ranging speeds as fast as 0.15 seconds suitable for target shooting,...
  • ACCURATE LONG RANGING CAPABILITIES: With long distance ranging capability, this rangefinder is accurate and versatile for various objects at short...
  • HIGH TRANSMISSION LCD DISPLAY WITH 3 RETICLE OPTIONS: Our enhanced LCD display provides brighter image and color quality with over 40% more light...
  • PREMIUM OPTICAL QUALITY: Our All Glass Optical System provides better light transmission vs. lesser quality plastic lens systems. 10 times...
  • ADVANCED TECHNOLOGIES AND LIFETIME PROTECTION: Packed with featured technologies including Ballistics Mode, Scan Mode, Horizontal (Angle Corrected)...
Bestseller No. 17
ATN Auxiliary Ballistic Smart Laser Rangefinder w/Bluetooth, device works with Mil and MOA scopes...
  • Unmatched Accuracy - range in up to 1000 yards with the ABL 1000. One button operation through your ATN Smart scope makes ranging easier than ever
  • Smart Ballistic Calculator - just press one button to integrate with your Smart Scope and shift your reticle to the new POI (Point of Impact)
  • Pairs with Smart HD - works with ATN’s X-Sight II, X-Sight 4K, and ThOR 4 series
  • See the Distance to your target on your Videos - not sure how far you were when you made that perfect shot. No worries your video will have the range...
  • > NOTE: There will be no visible indication that the device is powered ON other than the Bluetooth icon in the scope changing to a solid blue circle...
Bestseller No. 18
LaserWorks Range Finder for Hunter, Laser Rangefinder for Hunting with Slope, Range Finder...
  • 【Waterproof Range Finder】-This rangefinder for hunting is crafted with IPX5 waterproof standard, good to be used in harsh conditions. No worries...
  • 【Range Finder for Hunter】-The rangefinder accuracy is +/- 1 Yard. There are 3 modes, continuous scan ranging to mapping multiple targets, small...
  • 【Easy Operation】-The range finder is easy to operate with Power/Ranging button and Mode button. Simply pointing at the target and trigger the...
  • 【Light Weight & Durable】-The range finder for hunter weights only 152g. The ergonomic design makes the range finder easy to hold. Hand strap and...
  • 【Quality Rangefinder】-6X magnification with clear image at day time. Package includes a range finder soft pouch, wrist lanyard, lens cleaning...
Bestseller No. 19
KILO1600 6x22mm Waterproof Digital Ballistic Laser Rangefinder OLED SOK16608 with 2 Extra CR2...
  • Transparent Red OLED display for daytime and low light use. Simplified user interface with range and mode buttons only
  • Lumatic display automatically calibrates display brightness to changing ambient light conditions. Compact, lightweight polymer housing with eyecup and...
  • HyperScan provides 4 range updates per second in scan mode while RangeLock reports the last range result when ranging distant targets
  • Revolutionary LightWave DSP technology for the fastest and longest distance rangefinder engine
  • Features line of sight or angle modified range, units in yard or meters to tenth Y/M resolution
Bestseller No. 20
AOFAR HX-700N Hunting Range Finder 700 Yards Waterproof Archery Rangefinder for Bow Hunting with...
  • 【HIGH PRECISION FUNCTIONAL RANGEFINDER】:Advanced pinsensor technology, 6x magnification, accuracy with ±1 yard.
  • 【HUNTING RANGE FINDER】:Measurement up to 700 yards. Use range and fog mode can give you amazing experience for hunting even in bad weather day.
  • 【FOUR MODE FOR ANY CIRCUMSTANCE】:For hunting and golf with four mode:Range,Scan,Fog and Speed. You can easily identify target with continuous...
  • 【LIGHTWEIGHT AND PORTABLE】:Dimension is 110x 75 x 45 mm and weight is 180g. Waterproof and dust resistant with durable feeling. Perfect for...
  • 【RISK FREE AND FULL ACCESSORIES】:AOFAR factory direct selling with TWO year VIP and lifetime customer support. Including carrying pouch, CR2...

What should you look for when purchasing the best waterproof rangefinder?

To purchase the right product, you need to research its qualities and flaws.

Diversity is highly important since it offers options for different budgets and lifestyles. Choosing the best waterproof rangefinder requires asking yourself the right questions to ensure the product is precisely what you need.

To make your money’s worth, you should thoroughly research the options you are presented with and ask the following questions:

  • How does buying waterproof rangefinder benefit me?
  • Is it worth the price?
  • Which waterproof rangefinder is the best option to go for in the nowadays market?
  • What features are essential when purchasing the waterproof rangefinder?
  • Which brand of the this is most trustworthy?
  • Which waterproof rangefinder has the best price/value ratio?

You are bound to have even more vitally important questions when purchasing the waterproof rangefinder. The best way to inform yourself about it is a meticulous exploration of internet resources and research for second opinions and customer reviews.

Various websites can hold pieces of information necessary for purchasing a top-notch product. Forums, reviews, and rating websites can all offer you the instrumental info needed to buy the best possible waterproof rangefinder. In order to get accurate information, you should explore trustworthy websites that have a history of providing customers with specific and genuine content.

Curee.org worked hard and conducted comprehensive research to get you the necessary information regarding the waterproof rangefinder.

It helps us to put together a high-quality buying guide that will provide you with pros and cons, features, and reasons the product is the right choice for you. To get the waterproof rangefinder that will suit your needs best, you should consider the following factors:

Advantages of the Brand

Every brand of waterproof rangefinder holds different values to it. Typically, each and every brand will have something unique that will attract your attention and make you consider their product as the leading option. The more unique the feature is, the more it will allure you to the product and its value.

Features

Each product has some value that separates it from the pack. Therefore, always ask yourself what features are relevant when purchasing the waterproof rangefinder? What is essential for this product to have?

Value of the product

This factor is crucial since it can tell you how much value you will get for your money’s worth when purchasing this.

Customer reviews

The second opinion always matters when you cannot decide on which product you should opt for. These reviews will paint you the picture of the waterproof rangefinder by real-world customers that had experience with the product and inform you on how well it served them.

Customer ratings


Customer ratings are similar to reviews but offer you a number or star rating of the waterproof rangefinder, which can tip the scales when you are unsure which product to choose.

Reliability

To get the waterproof rangefinder that will serve your purposes and pay off, you need to choose a reliable and durable one. High-quality product equals wise investment and peace of mind.

Beware off-brands

Purchasing the off-brand waterproof rangefinder is unwise. Always look for reliable brands that offer you the highest possible quality and are trusted and recognized as a legitimate option.

Curee.org always tends to bring its visitors accurate and valuable information that is relevant to the waterproof rangefinder. We always refresh and update our content since our priority is and has always been top-notch user experience.

If you have any questions or suggestions about our presentation of the this product, please let us know. You can contact us here, and if our article has made you interested in our work, you can find more about us and better realize our vision and what it represents.

FAQ:

Q: What is the best range finder for hunting?

A: The Halo XL450 is the lightest and the best hunting rangefinder for close range hunting. Its maximum rated ranging distance is 450 yards with a magnification of 6X. This simply means it is suitable for bow hunting. It has the most reliable adjustment for altitude, and its operation is pretty easy.

Q: Can I use a hunting rangefinder for golf?

A: For hunting rangefinders, they often use a different technology to lock in on a target further away and IGNORE the items that it is picking up closer to you. That’s so it doesn’t give you a range to the tree that’s between you and your buck. You can turn this off as well if you are using a hunting rangefinder for golf.

Q: What is range finder?

A: range finder. or range·find·er. any of various instruments for determining the distance from the observer to a particular object, as for sighting a gun or adjusting the focus of a camera.