Century Precision Optics advanced line of Achromatic Diopters provides video zoom lenses with more close-up range and magnification, while maintaining zoom capabilities - without compromising image quality. Common single element diopters permit focusing at close camera-to-subject distances at the expense of image clarity. Instead, Achromatic Diopters feature two highly corrected glass elements which minimize chromatic aberration and distortion. More details about product +2.5 Achromatic Diopter 37mm
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