Varifocal Length Lenses can change the lens focal lengths to obtain a different field of view with minimal changes to the overall system. These lenses are applicable where an entire object including small features is required to be inspected within the same imaging system.
Varifocal Length Lenses provide a flexible solution to applications that previously would have required multiple fixed focal length lenses. Simply adjust through the indicated focal length range for the desired field of view within the specified working distance range, and then set the focus for the best image.
Due to the variable focal length range, varifocal lenses are also known as vari-focal, variable-focus, or multi-focal lenses. Varifocal Imaging Lenses can select the focal length within the specified range, like zoom lenses, but unlike a zoom lens, focus adjustment is needed after setting of the focal length.
They have a different, simplified optical and mechanical design that is more cost-efficient to produce than zoom lenses. The focal length adjustment is typically a middle or rear assembly of elements that slide back and forth, whereas the separate focus adjustment is typically a front cell movement.
Megapixel Varifocal Lenses are the ideal choice when you need a specific field of view that corresponds to a non-standard focal length. They make system integration straightforward while allowing for fine tuning, and also create the flexibility so the lenses can be integrated across multiple applications. Day/Night varifocal lenses are the perfect choice when you need to extend your imaging system into the NIR without sacrificing visible imaging.
Note: CS-mount lenses are not compatible with C-mount cameras.
