CCTV calculators

[dinefwr]

Lens calculator

[Stanislav]

· VideoCAD is a tool of view area and cameras' arrangement calculation

that will help you in designing CCTV of any complexity and functions.

· VideoCAD is user-friendly, allowing even the beginners to use the new

opportunities appearing to be hard to obtain without it due to

the complexity of calculations and therefore not being used even by

the skilled engineers of CCTV.

· VideoCAD practically boosts the quality of CCTV developing to a new

level which appears to be beyond any competition with those lacking

the program.

With VideoCAD you can:

· Choose the most suitable lenses, heights and locations for camera

installation to provide the required parameters of view areas, detect

and identify a person, read license plates out and obtain an object image

of required size on a display using the known actual sizes and location

of an object.

· Choose visually a relative location of cameras using the graphics window

with CAD interface.

· Calculate the horizontal projection sizes of viewing, person detecting,

identifying and license plate reading-out areas to draw them on the

object plan.

· Measure the view area distortions, arising from natural obstacles.

-Calculate the image size on a display of any object in camera view area

in the percentage of display size, pixels, TV lines and millimetres.

· Obtain a drawing containing two projections of object layout with the

camera images, calculated view areas and cables, and with coordinate grid

and text to be pasted into explanatory notes as an illustration as well.

· Obtain a text file with full description of all the cameras in project,

view areas and cables to be pasted into a project explanatory note or

used as an instruction on installation.

· Study the influence of the criteria of person detection, identification

and license plate reading-out on the sizes and location of the

correspondent areas by changing the criteria according to the video image

quality obtained.

· Study the principles of object representation in different view area

parts using test object and graphics window.

· Calculate the length and electric parameters of cables.

· Spare the means and win tenders due to the reduction of cameras'

quantity in projects and the increase of their efficiency.

· Reduce the time expended and boost the design quality.

· Cut down the amount of controversial situations with customers and

accelerate their solution.

CCTVCAD Sowtware

[Guest dale]

You dont need to cross post, we read the first one!

[Guest andy jinks]

just tryed that lens calc....and didnt understand a word of it ...

need a bit of help with it lads ....

[Guest Adrian]

yep tryed the calulater as well I dont get it what does it do?

Adrian B)

[ian.cant]

Basically a lens calculator works out what size lens you need depending on the distances and or size of area you want in your picture.

So you know what chip size your using (1/3 inch), use metres, and you have measured how far away and how wide the object you gonna watch is ( 10mtrs x 3 mtrs).

You want that object in you picture and its height will be say 3 mtrs, enter those into the calculator where required and calculate. it will now tell you what size lens you will need. In this case it will be a 16mm lens.

They were almost essential once but now i dont know anyone that needs to use one.

If a varifocal lens wont do the job then maybe you would need one but myself i sort of know from experience.

[Guest andy jinks]

Arrrrrr i understand now ....the focal lenth is the lens size...

[Guest Peter James]

Anyone know where I can get a cheap set of lense filters for night time focusing?

Pete

[ian.cant]

As silly as it may sound Peter i use a welders glass from Machine Mart, costs a couple of quid and works a treat.

[Guest celtickiwi]

Peter if you don`t have a len`s filter set your fine focus on the lens to the middle and use back focus on the camera then use the fine focus on the lens to get a sharp picture .......But if you get a len`s filter use it