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Computar CBF-1 CCTV Camera Back Focusing Neutral Density Filter W/ Case
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CBF-1 Overview:
The Computar CBF-1 neutral density filter is used primarily to make the proper back focus adjustments when installing motorized zoom lenses. To assure that a zoom lens stays in focus throughout the zoom range, the camera must be backfocused when cctv lens iris is wide open.
The Computar CBF-1 neutral density filter is placed in front of the lens to keep the auto-iris open during adjustment. The filter is 4" x 4" square and made of glass - not plastic - and has an ND rating of 3.0. The CBF-1 filter is an essential tool for the professional installer. Protective case included.
CBF-1 Features:
■ 4" x 4" Square
■ Protective Case Included
■ Achieve Proper Back Focus
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Industrial Covert Unlimited
Address: PO Box 5449, Traverse City MI, 49696
Phone: (231) 932-9550 or Toll Free 1-800-251-8839
Fax: (413) 480-3528 With Your Purchase Order
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