image tag: optical, main color: blue, image quantity: 15

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spectacles, glasses, eyewear, vision, eyesight, optical, sky
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bungee jumping, limit, bungee, snowboard, board address, icarus, address top
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bottle, mineral water, bottle of water, drinking water, plastic bottle, liquid, blue
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telescope, field-glass, optical, focus, binoculars, looking, panorama
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binocular, tower display, tourist sites, optical machine, observation, beach
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background, mirror, reflection, optical illusion, tree, sky, blue
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starfire optical range, research, laboratory, military, laser, beam, directed energy
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reading glasses, glasses, old, about, learn, read, eyeglasses
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telescope, view, distant, binoculars, distant view, viewpoint, outlook
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mount palomar observatory, california, san diego, research, science, astronomy, telescope
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telescope, sky, cyan, silver, coins telescope, viewpoint, binoculars
4000x2248px

telescope, field-glass, optical, focus, binoculars, looking, observation
3000x2270px

diagram, graphic, drawing, energy, iter, magnetic confinement fusion, toroidal
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viewpoint, telescope, distant, overview, bank, view, binoculars
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monitoring, safety, surveillance, the police, the investigation, high technologies, the inquest