L078-2.78-M12

2.78mm M12 wide angle low distortion fixed focus lens

Pictures

Specifications

Dimensions

Distortion map

The field angle map shows iso angle contour lines projected through the calibrated lens model onto the sensor plane. Each line represents a constant field angle from the optical axis outward. Straight, evenly spaced lines indicate clean rectilinear behavior. Curved or compressed lines reveal barrel or pincushion distortion. The blue dashed circle marks the image circle boundary - beyond it, no usable image is formed. All content outside the circle is clipped for clarity. This map is the quickest way to evaluate how a lens distributes angular information across the sensor and whether the distortion profile is suitable for your application.

DOF

The depth of field chart shows the near and far focus limits as a function of subject distance for a given f-number. The circle of confusion (CoC) defines the largest blur spot that still appears sharp in the final image. Here it is set at the Nyquist limit - twice the pixel pitch - which represents the smallest detail the sensor can physically resolve. Short focal length lenses produce inherently deep depth of field. In many cases the hyperfocal distance is well under one meter, meaning everything beyond that distance is acceptably sharp without refocusing. This is especially relevant for surveillance, machine vision, and multi camera rigs where active focus adjustment is impractical or undesirable.

Cube projection

The camera is placed at the center of a virtual cube, facing the front wall. Grid lines on all visible faces are projected through the calibrated lens model. Each wall is drawn in a distinct color - front, sides, top, bottom, and back - so you can immediately see which faces the lens covers. A lens with a horizontal FOV beyond 90 degrees will show portions of the side walls. Very wide lenses will reveal all five forward facing walls, while only ultra wide fisheye designs reach the rear wall behind the camera. The view is clipped to the image circle, showing only the usable portion of the projection. This gives an intuitive, at a glance sense of the lens's spatial reach and how it distorts geometry toward the edges.