Board Lens

Board Lens

CCTV Lens

Lensa CCTV Board Lens tersedia dalam:

  • SL-B245 : 2.45mm, Angle of View 140, F2.0
  • SL-B36 : 3.6mm, Angle of View 92, F2.0
  • SL-B6 : 6mm, Angle of View 53, F2.0
  • SL-B8 : 8mm, Angle of View 40, F2.0
  • SL-B12 : 12mm, Angle of View 28, F2.0
  • SL-B16 : 16mm, Angle of View 21, F2.0

Spesifikasi

SL-B245
Imager Size : 1.3″
Focal length : 2.5mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 121.5°
Focusing Range : 0.15m
Weight : 5g
SL-B36
Imager Size : 1.3″
Focal length : 3.6mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 92.7°
Focusing Range : 0.2m
Weight : 5g
SL-B4
Imager Size : 1.3″
Focal length : 4mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 76.1°
Focusing Range : 0.2m
Weight : 5g
SL-B6
Imager Size : 1.3″
Focal length : 6mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 51.6°
Focusing Range : 0.2m
Weight : 5g
SL-B8
Imager Size : 1.3″
Focal length : 8mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 42°
Focusing Range : 0.2m
Weight : 5g
SL-B12
Imager Size : 1.3″
Focal length : 12mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 27.1°
Focusing Range : 0.2m
Weight : 5g
SL-B16
Imager Size : 1.3″
Focal length : 16mm
Mount Type : M12x0.5
Aperture Range : F2.0-360°
Field : 21.2°
Focusing Range : 0.2m
Weight : 5g

Board Lens

Lens board is a photographic part used for securing a lens to the front standard of a large format view camera. The lens board itself is usually flat, square, and made of metal or wood and sometimes plastic. The lens board will have a hole of various diameters drilled dead center on the board. A lens board typically varies between 1 and 4 millimeters in thickness. The overall size and shape of the lens board depends on the brand of camera and film format used.

Some cameras will use 2 to 4 screws to secure the lens board to the front standard of the view camera, most commonly however, the lens board will be secured by one or more locking levers or tabs to allow tool-less removal of the lens board. The rear surface of a lens board is usually painted matte black to keep light entering the camera through the lens during exposure from reflecting off the surface and interfering with the projected image.

Lenses are fitted to a lens board by placing the shutter assembly through the front of the board and securing the shutter assembly by threading a locknut to rear of the shutter. A front lens element will thread onto the mounted shutter and if necessary, a second lens element will thread onto the rear of the mounted shutter. This procedure can be accomplished by a camera technician, or by an end-user with the appropriate tools.