Theia's telephoto varifocal lenses allows the user to optimize the field of view to zoom in on an area of interest far away (during camera setup). The multi megapixel resolution lenses support the new 4K resolution cameras with 4K compatible lenses for sensors 1/2.3" and true 4K resolution (12 megapixels) lenses for 1/2.3" and 1/1.7" sensors.
These telephotos allow the user to optimize the field of view with 4X zoom capability and then digitally zoom in up to 16X while still maintaining better than SD image resolution. The lenses are IR corrected for use with true Day/Night cameras giving a bright image in both visible and artificial IR illumination. This IR correction will keep the image sharp in daylight, at night, and in between when there is a mix of visible and IR illumination without the need for a camera with automatic back focus adjustement (the lens will work great on cameras that support auto back focus adjstement and those true Day/Night cameras that do not).
Telephoto lenses are available in motorized configurations with board mounts (D25) as well.
Theia offers several families high quality megapixel lenses designed to high image resolution standards. The use of aspheric lens elements and extra low dispersion glass types (ELD-glass) enable the unique features of each of Theia's lens families, be it ultra wide angle or short telephoto. Theia's process of precision engineering and prototype development and validation assure every lens shipped to our customers will be consistently high quality. Choosing the right lens for your application depends on many factors including field of view, required image resolution, day/night capability, and cost. To assist in lens selection, Theia offers an image simulator calculator that relates FOV, resolution, and object distance. We also offer many educational materials for a better understanding of the technology and selection of Theia's optimal lens for your application.