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Best Objective Lens Diameter

OMAX 3.5X-90X USB3 18MP Digital Trinocular Zoom Stereo Microscope on Desk Stand with 144-LED Light

  • Head: 45 degrees inclined 360 degrees rotatable trinocular.
  • Eyepieces: 30mm widefield WF10X/20 and WF20X.
  • Beam split lever enables photo-tube or left eye-tube.
  • Interpupillary distance: adjustment 2-3/16inch ~ 2-15/16inch(55mm ~ 75mm).
  • Diopter: adjustable on both ocular-tubes +/-5dp.
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Monstrum Rubberized Flip-Up Rifle Scope Lens Covers (Eyepiece | 43-48 mm/1.7-1.9 inch Diameter)

  • 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 package includes one Rubberized Flip-Up Lens Cover.
  • 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..
  • Please refer to sizing chart and sizing video, carefully measuring the OUTSIDE diameter of your scope, to ensure the proper size and fit..
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Monstrum Rubberized Flip-Up Rifle Scope Lens Covers (Objective Bell | 37-42 mm/1.5-1.7 inch Diameter)

  • Rubberized flip-up rifle scope lens covers that conform tightly around your rifle scope tube, protecting your lenses from dust and abrasion.
  • IMPORTANT: Sizing is not based on the objective lens size of your scope – a 3-9x40mm scope will not fit with a 40mm sized lens cover. For the correct fitting lens cover, you must physically measure the outside diameter of your scope eyepiece and objective..
  • Each package includes one Rubberized Flip-Up Lens Cover.
  • Spring-loaded flip-up mechanism pops open effortlessly when needed and securely tightly when not in use.
  • Please refer to sizing chart and sizing video, carefully measuring the OUTSIDE diameter of your scope, to ensure the proper size and fit..
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AmScope SM15 1.5X Barlow Lens for SM and/or SW Stereo Microscopes (48mm)

  • 1.5X Barlow (auxiliary objective) lens for SM and/or SW series stereo microscopes, extending magnification power of the microscopes by 1.5 times. Mounting size: 1-7/8" (48mm) in diameter..
  • 1.5X Barlow (auxiliary objective) lens for SM and/or SW series stereo microscopes, extending magnification power of the microscopes by 1.5 times..
  • Mounting size: 1-7/8" (48mm) in diameter..
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AmScope A100X 100X (Oil) Achromatic Microscope Objective

  • This brand new 100X (spring, oil) Achromatic microscope objective lens fits common size (DIN/JIS standard) compound microscopes.
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AmScope A40X 40X (Spring) Achromatic Microscope Objective

  • This brand new 40X (spring) Achromatic microscope objective lens fits common size (DIN/JIS standard) compound microscopes.
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AmScope A10X 10X Achromatic Microscope Objective

  • This is a brand new 10X Achromatic microscope objective lens with high quality.
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Visionking Telescope 3 Inches Newtonian Telescope for 76 300mm Reflector Astronomical Beginners

  • Objective lens diameter: 76 mm(3 inches).
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Levenhuk Bruno Plus 20x80 Powerful Astronomy Binoculars with Fully Multi-Coated Lenses and Sealed Body Construction

  • Powerful high-aperture astronomy binoculars that can replace an amateur-level refractor.
  • Powerful high-aperture BaK-4 glass objective lenses transmit a contrast, crisp, detailed picture.
  • 5-element eyepieces smooth out the image and minimize optical and spherical distortions.
  • Comes with a strap, pouch, eyepiece and objective lens caps.
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SVBONY SV503 Telescope 102ED F7 Extra Low Dispersion Achromatic Refractor OTA Micro-Reduction Rap Focuser for Astrophotography

  • 102mm objective lens diameter and f/7 focal ratio telescope OTA.
  • large objective lens brings more lights into the scope body and you will get more bright and clear image.
  • Doublet air spaced achromatic S-FPL51 ED glass provides you less chromatic aberration image.
  • ultra wide band multi-layer coating technology.
  • 102mm aperture optics and retactable lens hood deliver bright wide-field images with sharp resolution.
  • it comes with dual focus rack and pinion focuser with focus knob cover.
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NyLeabon 4x32 Crossbow Scope Red and Green Illuminated Scope Glass Etched Reticle Scope Compact Hunting Scope Shooting Scope with 1 Inch Scope Rings Black 4X32EG

  • 4x32 Compact Crossbow Scope - 4x magnification, 32mm objective lens diameter, 25.4mm tube diameter, click value is 1/4 MOA, 22mm scope rings, compact....
  • Red and Green Illuminated Scope - With red and green illumination, 5 levels brightness control..
  • Glass Etched Reticle Design - 4 aiming points glass etched reticle which is easy to adjust, special design for crossbow use..
  • Multi Coated Lens - Multi optically coated eyepiece lens and objective lens can offer wide view and clear image..
  • Shockproof, Waterproof and Fogproof - Solid aluminum alloy tube can offer better shooting experience, it is shockproof. We can use this crossbow scope....
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Aim Sports 4X32 Tri III. Scope with Fiber Optic Sight

  • High performance optical scope with fiber optic sight.
  • 4X magnification power and 32-millimeter objective lens.
  • Six-inch total length, 30-millimeter tube diameter, 32-millimeter objective lens, and 2"-2.5"inch eye relief.
  • Eight-millimeter exit pupil, 36.6-foot field of view at 100 yards, and 16.4-ounce weight.
  • Includes limited lifetime manufacturer's warranty.
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Levenhuk Karma Plus 10x32 Compact Waterproof Binoculars with BaK-4 Glass Optics

  • High-quality universal roof prism binoculars.
  • High-quality multi-coated BaK-4 glass optics ensures high-quality, truly sharp views.
  • Reliable rubber-armored shell is completely waterproof and fogproof.
  • Comes with eyepiece and objective lens caps.
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