ReviewsAdjustable Objective Lens

Telescope for Kids with Tripod - 40mm Beginner Telescope with Adjustable Tripod and 30x Magnification for Science, Nature and Astronomy by Hey! Play!

  • BEGINNER ASTRONOMY TELESCOPE – The lightweight and durable construction of this telescope paired with the 40mm objective lens helps to locate and view objects faster. Makes exploring stars and constellations in the night sky, or wildlife during the day fun and easy..
  • STRONG MAGNIFICATION – This telescope is small enough to take anywhere, but still features powerful magnification up to 30x.   The magnifying capabilities of this beginner telescope are perfect for nature and science exploration!.
  • EASY TO SET UP AND USE - This beginning telescope includes a full-sized adjustable tripod, and a convergent objective lens and a divergent eyepiece lens for effortless viewing and stargazing.  The setup of this telescope is easy with a quick screw-type assembly and no tools required to put together..
  • PRODUCT DETAILS - Dimensions of Telescope: 18.5 inches (Length) x 2.5 inches (Diameter), with a 27” adjustable tripod.  Telescope is yellow, and tripod is silver, both with black features..
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Beileshi 6-24X50 AOEG Optics Hunting Rifle Scope Red & Green Illuminated Crosshair Gun Scope with Flip Up Scope Covers

  • Magnification: 6-24X, Objective Diameter: 50mm, suitable for close to mid range or long range shooting..
  • Rangefinder reticle with 5 levels of illuminations in green and red color,diopter adjustable fast focus eyepiece for people with different eyesight..
  • AO adjustment:the adjustable objective (AO) lens can be moved by the parallax dial at the end of the scope.Etched Reticle on the Glass(EG) make sure the reticle won’t fall apart..
  • Eavy duty scope ring mounts for .79(20mm) rail only.2x ring mounts,CR2032 battery and lens cover included.
  • Made of aerospace aluminum alloy, shockproof,waterpfoof,fog-proof,solid and durable.Hard anodizing multi-coated lenses ensure a good hand feeling and avoid scratching..
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Occer 10x42 High Power Monocular Telescope HD Dual Focus Scope, Compact Monocular with Bak4 Multi-Coated Zoom Lens, Low Night Vision for Hunting Bird Watching Camping Outdoor Sporting

  • ...E FIELD OF VIEW AND HD DUAL FOCUS. The HD monocular has broad view field, 419ft/1000yds(128m/1000m), and it will provide the farther scenery in your eyes. The HD dual focus in the zoom monocular, watching animals or other thing much more clear, and you can adjust the two focus knob slightly according to your sight..
  • ADJUSTABLE EYE CUP FIT MORE PEOPLE. This focus monocular is design for more people, especially perfect for glasses wearers. It can let eye-glass wearers near to the eyepiece without disturbing the viewing experience, feel more comfortable. With or without glasses wearers can twist up and down the adjustable eye cups for the best visual effect. TIPS :People who do not wear glasses need to twist up the adjustable eye cups,that will gain clearer image..
  • LIFE WATERPROOF, COMPACT AND SINGLE-HAND USE. The life waterproof monocular is cover by durable and environmental rubber. And the monocular telescope only weigh 281g, 154mm high, The handheld monocular is compact and easy to use by one-hand, convenient to carry for everywhere..
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Elikliv EDM301 Biological Microscope with 9\ IPS Screen- Three Lens 100X, 600X, 1200X Digital Microscope for Adults with Touch Control, 24MP Resolution, Windows/Mac OS Compatible

  • ...choose from! It really greatly facilitates the work needs of professionals. It is also a useful tool for enthusiasts to explore the micro-world and satisfy their curiosity!.
  • 【Professional Observe Design】Biological microscope is designed with a safety regulation area like a traditional microscope, the appropriate adjustable upper limit can avoid damage to the specimen and lens due to excessive adjustment. The magnetic fixing clip (included) can be installed on the object stage. The surface of the microscopes object stage is a non-slip treatment..
  • 【Adopted 11 LED Light Design】 The 10 Adjustable LED illuminator ensures your specimens are clear and bright.
  • suitable for observing glass specimens, provides more excellent detail and optimal clarity and allows to capture pictures or video even in some dark places..
  • 【Support Connection with PC for Larger and Clearer Visual Experience 】 this video microscope is compatible with Windows XP/Vis ta/7/8/10 or Mac 10.5/Above. it is easy to record high-definition video and picture with larger scale, enabling you to accurately measure specimens.
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Bushnell 613510A Rimfire Optics Scope with Multi-X Reticle 3.5-10 x 36mm Matte

  • 3.5-10X magnification and a 36mm objective lens.
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Sig Sauer BDX Combo Kit Sierra6BDX 3.5-10x42mm Rifle Scope 30mm Tube, Second Focal SOK16BDX02

  • Magnification: 6-24X, Objective Diameter: 50mm, suitable for close to mid range shooting..
  • Rangefinder reticle with 5 levels of illuminations in green and red color,diopter adjustable fast focus eyepiece for people with different eyesight..
  • AO adjustment:the adjustable objective (AO) lens can be moved by the parallax dial at the end of the scope.Etched Reticle on the Glass(EG) make sure the reticle won’t fall apart..
  • Eavy duty scope ring mounts for .79(20mm) rail only.2x ring mounts,CR2032 battery and lens cover included.
  • Made of aerospace aluminum alloy, shockproof,waterpfoof,fog-proof,solid and durable.Hard anodizing multi-coated lenses ensure a good hand feeling and avoid scratching..
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Monstrum G2 6-24x50 First Focal Plane FFP Rifle Scope with Illuminated Rangefinder Reticle and Parallax Adjustment | Black

  • High precision tactical rifle scope with 6-24x magnification, a 50mm objective lens, and an eye relief of 4-4.5 inches.
  • Functionally designed first focal plane rangefinder reticle, with easy-to-read ranging information that remains constant regardless of magnification, for faster range estimation and holdover correction.
  • Equipped with an adjustable objective lens – or AO – that allows for sharper focus of the target image, elimination of parallax, and range estimation.
  • Dial controlled reticle illumination in both red and green with multiple brightness intensities, for better reticle visibility.
  • Package also includes set of high profile picatinny scope rings, a detachable honeycomb filter sunshade, a set of spring loaded flip-up lens covers, a felt drawstring carrying bag, a lint free cleaning cloth, and one CR2032 3V battery.
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Levenhuk Wise PRO 10x50 Monocular

  • High-aperture waterproof monocular with 10x magnification and a 50mm objective lens.
  • Multi-coated BaK-4 glass optics deliver a saturated and contrast image.
  • large 50mm objective lens gathers much light and ensures great visibility even in twilight.
  • Waterproof shell is impervious to rain and snow.
  • nitrogen filling protects the optical elements from fogging.
  • Long eye relief is convenient for observing in regular glasses or sunglasses.
  • eyepiece and objective lens protective caps.
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Levenhuk Wise PRO 8x42 Monocular

  • Wide-field waterproof monocular with 8x magnification and a 42mm objective lens.
  • Multi-coated BaK-4 glass optics deliver a saturated and contrast image.
  • 42mm objective lens gathers much light and ensures great visibility even in twilight.
  • Waterproof shell is impervious to rain and snow.
  • nitrogen filling protects the optical elements from fogging.
  • Long eye relief is convenient for observing in regular glasses or sunglasses.
  • eyepiece and objective lens protective caps.
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Monstrum Rubberized Flip-Up Rifle Scope Lens Cover Set

  • Rubberized flip-up rifle scope lens covers that conform tightly around your rifle scope tube, protecting your lenses from dust and abrasion.
  • Spring-loaded flip-up mechanism pops open effortlessly when needed and securely tightly when not in use.
  • Each set includes two Rubberized Flip-Up Lens Covers. This set include one eyepiece cover with the size 37-43mm/1.5-1.7in and one objective cover with the size 26-31mm/1.0-1.2in.
  • For optimum fit, carefully measure the OUTSIDE DIAMETER of both your rifle scope’s eyepiece and objective bell. Please note that this measurement is different than the diameter of your objective lens.
  • Available in a full range of sizes to fit any rifle scope. Eyepiece Cover available in 37-43 mm(1.5-1.7 inch) or 43-49 mm(1.7-1.9 inch diameter). Objective Lens Cover available in 26-31 mm(1.0-1.2 inch), 31-37 mm(1.2-1.4 inch), 37-43 mm(1.5-1.7 inch), 43-49 mm(1.7-1.9 inch), 49-55 mm(1.9-2.1 inch), or 55-62 mm(2.2-2.4 inch) diameter.
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Monstrum G2 6-24x50 First Focal Plane FFP Rifle Scope with Illuminated Rangefinder Reticle and Parallax Adjustment | Flat Dark Earth

  • High precision tactical rifle scope with 6-24x magnification, a 50mm objective lens, and an eye relief of 4-4.5 inches.
  • Functionally designed first focal plane rangefinder reticle, with easy-to-read ranging information that remains constant regardless of magnification, for faster range estimation and holdover correction.
  • Equipped with an adjustable objective lens – or AO – that allows for sharper focus of the target image, elimination of parallax, and range estimation.
  • Dial controlled reticle illumination in both red and green with multiple brightness intensities, for better reticle visibility.
  • Package also includes set of high profile picatinny scope rings, a detachable honeycomb filter sunshade, a set of spring loaded flip-up lens covers, a felt drawstring carrying bag, a lint free cleaning cloth, and one CR2032 3V battery.
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