Canon Lens EF 24mm 1:1.4 L USM

Aperture Range [f] 1.2 to 16 Closest Focus 0.45m / 1.48 ft.
Dimensions 65.5mm x 85.4mm / 2.6 in. x 3.4 in. Magnification Ratio 0.15x / 1:6.7
Weight 545g / 19.2 oz Filter Size 72mm

Analysis of the 50mm lens resolution chart revealed that it is the sharpest at f/8. The image quality on a camera's chip depends on the distance from the center, as shown below, with the average resolution in hundreds of line widths per picture height (LW/PH) given below each chart.

lens quality test

At the full aperture there is a gradual drop of sharpness from 3600 to 3000 LW/PH from the center to the 12th mm, and than it levels off.
At the optimum aperture, f/8, the lens performance is very good throughout the entire frame (resolution of "37" is the max. theoretical number in this test).

Vignetting is significant between f/1.2 and 1.4, but only for full frame cameras. Chromatic aberration is minimal. The size of the circles remain relatively constant trhoughout the frame, where the 21mm circle diameter is only 1% smaller than the one in the center. At the 21st mm the circles are only about 1% elongated. The lens has very little distortions and if you have several images that cover a wider view can be easily stitched together.

This is a high quality bright lens, very handy for portraits. Compared to the zoom lens EF 24-105mm at 50mm, it is slightly sharper and produces significantly less distortions.


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