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Lens calculator - Calculating the object size / field of view (FOV)

The object size G is usually the object range to be detected which must be viewed by means of the camera.

Method1
'Classic',
G=B* (g / f´-1)
Method4
Extended calc. of
width, height & diagonal
Method2
Using
imaging scale
Method3
Using opening angle

Calculating the object size or FOV using entocentric standard lenses

Calculate the field of view given the working distance, sensor size and lens focal length.

G = B * (g / f'-1)

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!


Sensor size :
Focal length:
Working distance in mm:


Calculated object size (FOV):


Calculating the object size (height, width, diagonal) using real sensor dimensions

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!

Sensor pixel count in X direction:
Sensor pixel count in Y direction:
Pixel size in µm:
Focal length of lens:
Working distance in mm:


Calculated sensor dimensions:
Calculated sensor ratio:


Object size / FOV
X:
Y:
Diagonal:


Attention: Calculated object sizes of several millimetres can indeed be realised by means of entocentric lenses (incl. close-up rings), but often hardly useful. Normal objects with close-up rings in retro position provide an alternative for better image quality. In case of smallest image details and large magnifications please use macro-lenses which are specially designed for these applications.

Further details on optical calculations can be found in chapter Optical basics.


Calculating the object size using the reproduction scale (macro & telecentric lenses)

Also for macro lenses and telecentric lenses it is possible to calculate the field of view using the imaging scale and sensor size.

Object size G = sensor size B / imaging scale ß

Abbildungsmaßstab beta

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!


Sensor size:
Imaging scale of lens:


Calculated object size (FOV) in mm:


Calculating the object size from opening angle

The field of view at a given working distance can also be calculated using the aperture angle of the optics.


Opening angle of lens:
Working distance in mm:


Field of view (object size):


Note:

Further details on optical calculations can be found in chapter Optical basics.

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