Lens Calculator for CCTV design

by Stanislav

CCTV Design Lens Calculator 1.0 - a new advanced free Lens Calculator for CCTV designers

This CCTV Lens Calculator offers usual features of other Lens calculators and in addition several new more effective tools:

CCTV Lens Calculator will help you:

Choose the most suitable lenses, heights and locations for camera installation to provide required parameters of view areas.

Calculate the horizontal projection sizes of view areas to draw them on the location plan.

The calculation of the projections is performed in 3D coordinate system, depending on parameters and height of the camera, required range of heights and the maximum distance of video surveillance. It is convenient to use the resulting projection to draw them on the location plan during CCTV design in any graphics program.
CCTV Lens Calculator can correctly calculate all possible camera positions not only the standard one.

Choose optimal camera resolution for any specific tasks.

Calculate distances from the camera up to which the specified criteria of spatial resolution (pixel density) and field-of-view size are satisfied. It is convenient to mark these distances on the obtained projections during CCTV design in any graphics program. The default values of these criteria of spatial resolution correspond to the five regions according to the

CCTV Operational Requirements Manual 2009: Monitor and Control, Detect, Observe, Recognize, Identify.

Calculate values of spatial resolution (pixel density) and field-of-view size at specified distances from the camera.

Visually, using automatically scalable pictures, estimate details of images of various objects at specified distances from the camera or with specified values of spatial resolution (pixel density). CCTV Lens Calculator contains photos and models of people and a car with license plate. You can add your own pictures.

CCTV Lens Calculator allows to model images from megapixel cameras, up to hundred of megapixels using PiP (Picture in Picture) technology.
The Lens Calculator has Digital ZOOM tool for more accurate estimation of resolution.
CCTV Lens Calculator allows to export the results of calculation and models of images as screenshots in formats *. bmp, *. jpg, *. gif, *. tiff, *. png. You can also copy the results and images to the clipboard.

CCTV Lens Calculator can operate metric (meters) and imperial (foot) measurement systems.

Tools of CCTV Design Lens Calculator are based on VideoCAD CCTV Design Software.


CCTV Design Lens Calculator calculates the spatial resolution by a simplified way, along the main optical axis of the camera. Height of the camera, camera tilt angle and height of measurements of the spatial resolution are not taken into account. These parameters are used only for calculating view area projections.

When modeling resolution only the number of pixels is taken into account. Other factors affecting the detail of object images (compression, lens resolution, contrast, noise, etc.) are not counted. Thus, the models demonstrate the maximum possible image detail of an object with the specified spatial resolution. The real image of the object may be less detailed.

In modeling spatial resolution using pictures, the simulated spatial resolution can not exceed the spatial resolution of the pictures.

If necessary, you may consider some of nonregistering factors using corrective factors, or use much more powerful CCTV design software - VideoCAD.

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