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For Video Applications Requiring a Larger Field-of-View
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18-108 Macro Video Zoom Lens is designed to attach directly to a video camera. This lens includes a special "close-up" lens that allows it to function with a working distance as close as 5.5-11inches. When the "close-up" lens is removed, it will function from 11" out to infinity.
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Features/Advantages
- Parfocality - Maintain focus throughout the entire zoom range.
- Longer Working Distances - From 5.5 inches to infinity.
- Magnification - With "close-up" lens = 1.0X - 0.066X. Without "close-up" lens = 0.47X - 0.084X
- Compatibility - Single chip, C-Mount video cameras. 2/3" camera format or smaller recommended.
Macro Video Zoom Lens Specifications
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Working Distance
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Focal Length
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18 - 108 mm
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Aperture
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F/2.5 - Closed
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Magnification w/close-up lens
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Zoom Ratio
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6:1 (parfocal)
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Focus
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External, Manual w/ locking screw
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Zoom Control
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External, Manual
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Video Mount
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C-Mount
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Camera Format
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2/3" or smaller
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Weight
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1 lb., 3 oz.
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Length
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159 mm
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Diameter
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62 mm maximum
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Fields-of-View (F.O.V.)
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With "Close-Up" Lens
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Working Distance
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F.O.V. (mm) @ Low Mag.
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F.O.V. (mm) @ High Mag.
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5.5"
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38 x 51
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6 x 8
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7"
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60 x 80
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10 x 14
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8"
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72 x 96
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12 x 16
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9"
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83 x 110
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14 x 19
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10"
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90 x 120
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16 x 22
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11"
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100 x 133
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17 x 23
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Without "Close-Up" Lens
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Working Distance
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F.O.V. (mm) @ Low Mag.
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F.O.V. (mm) @ High Mag.
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11"
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79 x 105
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14 x 19
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24"
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198 x 264
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33 x 44
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36"
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311 x 415
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55 x 73
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48"
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415 x 553
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70 x 93
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* Based upon a 2/3" camera format. For 1/2" camera format, multiply F.O.V. x 0.72. For 1/3" camera format multiply F.O.V. x 0.54.
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