D-Link DVC-20 2 x 4-8mm Varifocal Lens, For DVC-1000/1100

List Price: $90.15

Features:

• Product Type - Accessory Len
• Provides a Wide Angle View for Wider Coverage or "Zoom In" View for a Close-Up
• High Quality Glass Lens Elements
• Focal Length: 4mm to 8mm
• Back Focal length: 7.6mm to 11.4mm

Customer Reviews:

Poor focus depth [Posted on 2005-09-26]
I purchased it to better frame the video picture.
I found the following problems:
(1) focus depth very narrow.
(2) focus does not work on both ends of the zoom range.
It may be a design or manufacturing defect.
I returned it after a week of usage.

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