Practical optics, from sensor to scene.
Calculators for engineers who choose and design lenses: for phone, security, machine-vision, automotive, robotics and drone cameras, or any other lens and sensor pairing. Each tool shows its formulas, so you can check the math.
Tools
6 toolsDepth of field
Near and far limits, hyperfocal distance, and the f-number and focus distance needed for a required sharp range.
Open tool → LiveField of view
Horizontal, vertical and diagonal FOV from focal length and sensor size, or the focal length for a target FOV. Rectilinear and fisheye projections.
Open tool → LiveSensor format
What “1/2.8-inch” really measures. Active-area size from resolution and pixel pitch, diagonal, crop factor and the nearest optical format.
Open tool → LiveDiffraction & resolution
Airy disk size, diffraction MTF at the pixel Nyquist frequency, and the f-number where your sensor becomes diffraction-limited.
Open tool → LivePixels on target
Pixel density and mm per pixel at a working distance, pixels on a target, and IEC 62676-4 DORI distances with the focal length each level needs.
Open tool → LiveDepth of focus
Image-side focus and tilt tolerance for lens-to-sensor alignment, and whether a fixed-focus module covers infinity to its nearest object.
Open tool →Learn
All articles →Built for engineering work
Starting values come from real camera modules and small sensors, not full-frame photography, and any lens and sensor pairing works.
Every tool lists the equations and assumptions behind its results.
Everything runs in your browser. No sign-up, and nothing you type is sent anywhere.