Item Description:
The VF2812 is a varifocal zoom PRO lens, and all lens adjustments must be made manually by hand. Once the desired focal length is acheived, the lens has thumb screws which tighten to maintain that specific focal length. It is a great option for KPC650CHQ cameras.
We also carry fixed focus C-mount lenses for those applications desired.
It can be used to provide a dynamic field of view control between 2.8mm and 11.5mm focal lengths, and the weight is 78 grams.
The VF2812 employs voltage from the camera's auto-iris port to automatically adjust the amount of light which passes through the lens optical glass and reaches the imager. This feature allows for brilliant lighting in many diverse and changing lighting conditions. However, its extra light gain sensitivity can make the video image too bright under certain direct forward lighting circumstances. When room illumination is likely to remain constant, a manual iris lens in fact offers better overall image quality in many situations.
Lens F.O.V. (Field Of View) chart.
1.7mm lens has approximate 170 degree field of view
2.1mm lens has approximate 158 degree field of view
2.5mm lens has approximate 147 degree field of view
2.8mm lens has approximate 130 degree field of view
2.9mm lens has approximate 127 degree field of view (Natural Human eye)
3.6mm lens has approximate 92 degree field of view
4.3mm lens has approximate 88 degree field of view
6.0mm lens has approximate 78 degree field of view
8.0mm lens has approximate 58 degree field of view
12 mm lens has approximate 28 degree field of view
This product was added to our catalog on Monday 31 December, 2007.
