objective lens
noun
technical
: a lens or system of lenses in a microscope, telescope, etc., that forms an image of an object
Examples of objective lens in a Sentence
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Key features: 10x magnification, 42mm objective lens diameter, high-quality BaK-4 prisms with anti-reflective coating, 6.2-degree angle of view, waterproof and fog-proof.
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Paul Brett, Space.com, 11 June 2025
The regular model features the same huge 70mm objective lens, 18 mm of eye relief and multi-coated optics.
—Harry Bennett, Space.com, 20 May 2025
The large 70mm objective lens on this model offers maximum brightness in low-light and long-range conditions.
—Harry Bennett, Space.com, 20 May 2025
Key features: 10x magnification, 25mm objective lens diameter, non-removable glass solar filters, 5.7-degree angular field of view, 11.5 oz weight.
—Paul Brett, Space.com, 17 Mar. 2025
Key features: 8x magnification, 42mm objective lens diameter, 8.1-degree angular field of view, 17mm eye relief, 23.1 oz weight.
—Rich Owen, Space.com, 7 Mar. 2025
When light enters the monocular through the objective lens located at the front of the device, it is initially inverted, meaning that the image appears upside down.
—Matt Morris, Space.com, 16 Jan. 2025
On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters.
—Jamie Carter, Space.com, 15 Jan. 2025
The larger the front lens (also called the objective lens), the more light reaches your eye.
—Scott Gilbertson, WIRED, 6 Oct. 2024
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Paul Brett, Space.com, 11 June 2025
The regular model features the same huge 70mm objective lens, 18 mm of eye relief and multi-coated optics.
—Harry Bennett, Space.com, 20 May 2025
The large 70mm objective lens on this model offers maximum brightness in low-light and long-range conditions.
—Harry Bennett, Space.com, 20 May 2025
Key features: 10x magnification, 25mm objective lens diameter, non-removable glass solar filters, 5.7-degree angular field of view, 11.5 oz weight.
—Paul Brett, Space.com, 17 Mar. 2025
Key features: 8x magnification, 42mm objective lens diameter, 8.1-degree angular field of view, 17mm eye relief, 23.1 oz weight.
—Rich Owen, Space.com, 7 Mar. 2025
When light enters the monocular through the objective lens located at the front of the device, it is initially inverted, meaning that the image appears upside down.
—Matt Morris, Space.com, 16 Jan. 2025
On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters.
—Jamie Carter, Space.com, 15 Jan. 2025
The larger the front lens (also called the objective lens), the more light reaches your eye.
—Scott Gilbertson, WIRED, 6 Oct. 2024
Cite this Entry
“Objective lens.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/objective%20lens. Accessed 1 Jul. 2025.
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