Telecentric lens compatible with megapixel (compatible with coaxial lighting, W.D.65 mm type)

Supports megapixels that can take advantage of camera performance!
Compact size and ideal for embedded applications!
Coaxial lighting compatible, working distance 65 mm type)


● Supports megapixels
● Single telecentric lens with structure centered on the face of the observer
● Compact size and ideal for embedded applications
● High-contrast design that allows you to clearly observe shadows and dark light, black and white
● Achieves low price while maintaining high performance

Product Inquiry phone028-3911-2006


Model RTK-05F-M65 RTK-08F-M65 RTK-1F-M65 RTK-1.5F-M65 RTK-2F-M65 RTK-3F-M65 RTK-4F-M65 RTK-6F-M65
Optical magnification 0.5x 0.8x 1x 1.5x 2x 3x 4x 6x
Working distance
65.1mm 65.4mm 65.1mm 69.8mm 65.2mm 60.5mm 65.3mm 64mm
Depth of field
2.87mm 1.18mm 0.79mm 0.35mm 0.26mm 0.18mm 0.08mm 0.06mm
12μm 8μm 6.7μm 4.4μm 4.4μm 4.4μm 2.9μm 2.9μm
Numerical aperture
0.028 0.042 0.05 0.076 0.076 0.076 0.118 0118
Valid F value 9 9.4 9.8 9.8 12.9 19.6 16.9 25.5
TV distortion -0.001% +0.006% -0.023% +0.007% +0.021% +0.014% -0.003% -0.026%
weight 80g 62g 54g 52g 55g 63g 85g 100g
Compatible camera 2/3 type 2/3 type 2/3 type 1/1.8 type 2/3 type 2/3 type 2/3 type 2/3 type
Mount C Mount C Mount C Mount C Mount C Mount C Mount C Mount C Mount
Scope of view
1/3 inch camera
(H x V)
9.6mmx7.2mm 6mmx4.5mm 4.8mmx3.6mm 3.2mmx2.4mm 2.4mmx1.8mm 1.6mmx1.2mm 1.2mmx0.9mm 0.8mmx0.6mm
Scope of view
1/2 inch camera
(H x V)
12.8mmx9.6mm 8mmx6mm 6.4mmx4.8mm 4.27mmx3.2mm 3.2mmx2.4mm 2.13mmx1.6mm 1.6mmx1.2mm 1.07mmx0.8


※1 Calculated value calculated with a permissible circle of confusion diameter of 40 μm
※2 Theoretical resolution calculated at a wavelength of 550 nm


Main features

A telecentric lens is a lens that has a constant magnification at any position within the object distance.
There is no change in magnification within the depth of field.
There is no image distortion due to the field of view, and the accuracy of shape measurement of deep parts is greatly improved.


Features of telecentric lenses

1.Can be used as a medium to high magnification macro lens.


→  The price will be higher than the macro lens, but the performance will also be improved.



2.There is no expansion or contraction of the object within the depth of focus.


 →Measurement error can be reduced when measuring dimensions.



3.You can reduce the ambient distortion due to parallax.



4.You can choose the focal length.
USBカメラ (Short-distance type WD65mm and long-distance type WD110mm are available)


5.When used with coaxial lighting, uneven illuminance of the object can be reduced. 
Non-coaxial type and coaxial lighting type are available


Example of use

Comparison between using a telecentric lens and using a macro lens
using a macro lens
using a telecentric lens
If you use a macro lens, the parallax between the center and the edge of the screen will be distorted even if you shoot the observation object from directly above.
However, when a telecentric lens is used, the distortion due to the parallax between the center and the edge of the screen is extremely small, accurate image information can be obtained no matter where the observation object is projected on the screen.


General Specification

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