dinefwr Posted April 27, 2003 Share Posted April 27, 2003 Lens calculator Link to comment Share on other sites More sharing options...
Stanislav Posted March 20, 2004 Share Posted March 20, 2004 · 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 Link to comment Share on other sites More sharing options...
Guest dale Posted March 20, 2004 Share Posted March 20, 2004 You dont need to cross post, we read the first one! Link to comment Share on other sites More sharing options...
Guest andy jinks Posted March 28, 2004 Share Posted March 28, 2004 just tryed that lens calc....and didnt understand a word of it ... need a bit of help with it lads .... Link to comment Share on other sites More sharing options...
Guest Adrian Posted March 29, 2004 Share Posted March 29, 2004 yep tryed the calulater as well I dont get it what does it do? Adrian B) Link to comment Share on other sites More sharing options...
ian.cant Posted March 29, 2004 Share Posted March 29, 2004 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. Link to comment Share on other sites More sharing options...
Guest andy jinks Posted March 29, 2004 Share Posted March 29, 2004 Arrrrrr i understand now ....the focal lenth is the lens size... Link to comment Share on other sites More sharing options...
Guest Peter James Posted March 29, 2004 Share Posted March 29, 2004 Anyone know where I can get a cheap set of lense filters for night time focusing? Pete Link to comment Share on other sites More sharing options...
ian.cant Posted March 30, 2004 Share Posted March 30, 2004 As silly as it may sound Peter i use a welders glass from Machine Mart, costs a couple of quid and works a treat. Link to comment Share on other sites More sharing options...
Guest celtickiwi Posted April 5, 2004 Share Posted April 5, 2004 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 Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.