Telecentric Lens Calculator

This telecentric lens calculator is specific to the CABR650 Basler Pulse puA1280-54um camera with Aptina AR0134 sensor having 3.75 x 3.75 micron pixels and 1,280 x 960 resolution.

Please let us know if you experience any problems using this calculator.

Complete the fields below to calculate the magnification of the ideal lens.


Complete the fields below to calculate the aproximate field of view.


These lens calculators are for telecentric machine vision lenses. Telecentric lenses have no perspective error, making them ideal for measurement systems.

All dimensional values are in millimeters.
First enter your application parameters in Calculator #1. This will help you determine the ideal lens magnification.
You're not likely to find a lens having the exact magnification suggested by Calculator #1. Typically, you'll want to select the first available lens having a lower magnification. This will result in a slightly larger field of view.
You can use Calculator #2 to determine the field of view provided by a lens having a particular magnification.
When imaging objects larger than the camera's sensor, choosing a large sensor will increase the necessary magnification. This typically results in a more compact lens that costs less. Plus, larger sensor pixels usually require less light and enables superior image contrast.
If you enter an area-of-interest ("AOI") smaller than the full sensor size, the calculator will assume the AOI is centered on the sensor, and that vignetting is acceptable outside the AOI. This sometimes enables selection of a lens having more magnification, resulting in a more compact and lower cost lens.
Calculators assume field of view width is in direction of the camera sensor's width. If your field of view's height is greater than it's width, consider rotating the camera 90 degress.
There are a couple cameras in our catalog that cannot access all of their sensor's pixels. Examples include the CASA200 and CABR212. The default AOI size is incorrect for these cameras.
There are many other factors to consider beyond lens magnification. Learn about telecentric lenses. We'd be glad to help you select a lens appropriate for your project.