CCTV Focal Length Lens Calculator:
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CCTV Focal Length Lens Calculator:
CCTV Focal Length Lens Calculator:
Distance from object multiplied by 4.8, divided by horizontal or vertical area equals the lens required.
D x 4.8 / A = L
e.g.
To focus on an area 5m wide from a camera installed 20m away would be:
20 x 4.8 / 5 = 19.2mm
so you would need a lens with a focal length of 19.2mm
ISLAM HAMED- عدد المساهمات : 12
تاريخ التسجيل : 31/03/2016
مواضيع مماثلة
» Fixed Focal Length and Variable Focal Length
» Focal Length:
» What is the CCTV Lens?
» What is the CCTV means???
» Lens selection:
» Focal Length:
» What is the CCTV Lens?
» What is the CCTV means???
» Lens selection:
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