Sigma 20mm f/2 DG DN Contemporary Lens for Leica L

The Sigma 20mm f2 DG DN is a compact and relatively affordable wide angle lens for anyone who desires broader coverage than a 24 without breaking the bank. The expansive field of view is ideal for landscapes, astro, architecture, and interiors, and it’s also great for video whether you’re in front...

Your level of interest in this lens will probably vary depending on the camera system you’re considering it for. L-mount options at or near this focal length are few and far between, which makes a compact and high performing prime at a reasonable price of $699 USD an interesting addition there.

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  Beautiful, feature rich construction, Includes some weather sealing, Fast, quiet autofocus, CA is well controlled, Excellent sharpness and contrast across the frame even wide open, Very strong flare resistance, Good coma control, Extremely compact size, Reasonable price

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  Heavy and complex barrel distortion, Strong, persistent vignette, 62mm filter thread is somewhat unusual, The Sony 20mm F1.8 G exists

Sigma 20mm F2 DG DN C is a Fixed aperture Auto Focus (AF) Ultra-Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with E Mount cameras. The Sigma 20mm F2 DG DN C is also available in the Leica L mount.

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  Weather-sealed, Autofocus, Aperture Ring, Hood supplied, Fast Aperture, Covers Full-Frame Sensor, 9 Diaphragm Blades for Smooth Bokeh, Min focus distance of, 0.22m / 8.7 inch

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  Weather-sealed, Autofocus, Aperture Ring, Hood supplied, Fast Aperture, Covers Full-Frame Sensor, 9 Diaphragm Blades for Smooth Bokeh, Min focus distance of, 0.22m / 8.7 inch

Sigma 20mm F2 DG DN C is a Fixed aperture Auto Focus (AF) Ultra-Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with L Mount cameras. The Sigma 20mm F2 DG DN C is also available in the Sony E mount.

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  Weather-sealed, Autofocus, Aperture Ring, Hood supplied, Fast Aperture, Covers Full-Frame Sensor, 9 Diaphragm Blades for Smooth Bokeh, Min focus distance of, 0.22m / 8.7 inch

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  Weather-sealed, Autofocus, Aperture Ring, Hood supplied, Fast Aperture, Covers Full-Frame Sensor, 9 Diaphragm Blades for Smooth Bokeh, Min focus distance of, 0.22m / 8.7 inch

I think Sigma has an uphill battle on its hands on the Sony front, but we’ll find out how the Sigma i20 stacks up in this review. You can read my

I understand that the C series follows its own rules – giving up distortion and vignetting correction was supposed to allow to correct other aberration better and guarantee small physical dimensions and weight. Still, in this particular case, Sigma went one step too far.

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  solid, weather-sealed mechanical construction,, good image quality in the frame centre,, sensible image quality on the edge of the APS-C sensor,, decent image quality on the edge of full frame,, negligible lateral chromatic aberration,, excellent astigmatism correction,, moderate vignetting on the...

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  monstrous vignetting on full frame,, distinct distortion of moustache variety.

Sleek I Series style with an extra-wide view

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  Broad wide-angle view, Bright F2 optics, Quick, quiet focus motor, On-lens aperture control, Classic black aluminum finish

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  Not fully weather resistant, Raw captures require distortion correction, Noticeable focus breathing