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Showing results for tags 'lens'.
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So quick question? Mounting 2 different cameras lens for a job. 1. 3-9 MM lens for all views other than ones see door entries. 2. 10-23 MM lens for walls adjacent doors. So yes the 3-9 MM will be exterior sides of bldg. And the 10-23 MM will be interior adjacent doors. Goal according to Engineer to capture faces entering doors. Problem the camera is only 15' to 20' away from the doors on two jobs so at 9' only issue is being to tight of a shot at that distance. According to the lens calculator of the manufacturer. The last building is about 50' in width and are placing the camera from a pipe mount 19 feet away and about 17' high which will be catching nothing more than top of heads. So question does anybody have any previous installs where this has been an issue. My thought is relocate on adjacent wall at 9' to 11' high wall is 50' from target. Cameras have varifocal lenses so see no problem with zooming into the door. Project is public utility and lots of approvals and arguments from engineer as they never wrong but want best view for customer. Ideas?
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I have a CCTV surveillance system of 12 cameras. The cameras that look at wide driveways and flat yards and fields work great at night. However 2 cameras look down paths (used by coyotes) with high bushes along each side. Regardless of where I place these cameras, the IR light is always too bright on the bushes which swamps out the view along the path. It seems that if I had a camera with a narrow field-of-view then the bushes wouldn't be in the picture and I could see the path. Is it possible to just add a simple (cheap) lens to narrow the FOV? If so, any suggestions would be appreciated. Or Is there any material I could use to mask off the IR beam along the edges without lighting up? I was thinking of putting tape along the sides of the camera to block IR light to the bushes but I think the tape would light up even more than the bushes. Unless maybe there is a material that refracts IR wavelengths out of the FOV without reflecting it back into the FOV of the camera. My system uses Q-See cameras and DVR.
