The 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 lens iris is wide open. The CBF-1 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.
Downloads
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Back Focus Instructions (Size: 62.6 KB) | |
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Lens Technical Guide (Size: 1.8 MB) |
Additional Information
| Product SKU | CBF-1 |
|---|---|
| Brand | Computar |
| Condition | New |
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