Telecentric lens
Telecentric lenses allow you to obtain images with less distortion.
I tested with our RT3 and RT5 telephoto lenses.
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We attached the RT3 and RT5 telecentric lenses to a USB camera to take photos of the glass ladder. |
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| Take pictures with RT3 telephoto lens | Take pictures with RT5 telephoto lens |
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You can see that the 4 corners of the screen are not distorted at all. This is a feature of telecentric lenses. |
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CCTV lens
If you are using a CCTV lens, a telephoto lens will have less distortion than a wide-angle lens.
We tested with a 6mm prime lens and a 25mm prime lens.
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We attached an 8mm fixed focus lens to a USB camera and took a photo of the chart paper. |
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It can be seen that the four corners of the chart paper are distorted. |
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We attached a 25mm fixed focus lens to a USB camera and took a photo of the chart paper. |
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There is not much distortion in the four corners of the graph paper. |
Some macro lenses have less distortion depending on the performance of the lens, but they are more expensive.
Conclude
Telecentric lenses allow you to obtain images with less distortion.
A feature of the telecentric lens is that there is no distortion at the four corners of the screen.
If you are using a CCTV lens, a telephoto lens will have less distortion than a wide-angle lens.
A feature of the telecentric lens is that there is no distortion at the four corners of the screen.
If you are using a CCTV lens, a telephoto lens will have less distortion than a wide-angle lens.
