14-24mm F2.8
DG DN | A
• Newly developed high-performance lens series for full-frame mirrorless cameras
• High-resolution image quality developed with exclusive low dispersion glass elements and NPC (Nano Porous Coating)
• Substantial functions enable user confidence, even in tough environments
• Rear filter holder as a standard accessory
| Product Lines | Art |
|---|---|
| Youtube Videos | |
| Instagram Widget | |
| Klevu Image | /p/r/product_img01_17.png |
| Construction | 18 Elements in 13 Groups |
| Lens Type | Wide Angle |
| Sensor Size | Full Frame |
| Angle of view | 114.2° - 84.1° |
| Number of diaphragm blades | 11 (Rounded Diaphragm) |
| Minimum aperture | F22 |
| Minimum focusing distance | 28 cm / 11.0 in |
| Maximum magnification ratio | 1:7.3 |
| Dimensions (diameter x length) | L-mount ⌀ 85.0 mm × 131.0 mm |
| Filter diameter | n/a |
| Edition number | A019 |
| Accessories | Case and Cover Lens Cap (LC850-01) supplied |
| EAN | L-mount |
Lens Construction
Geometrical MTF Chart
Diffraction MTF Chart
Dust and Splash Resistant Structure
This lens features a highly effective dust and splash resistant structure with special sealing at the mount connection, manual focus ring, zoom ring, and cover connection.
*Although this construction allows the lens to be used in light rain, it is not the same as being waterproof, so please prevent large amounts of water from splashing on the lens. It is often impractical to repair the internal mechanism, lens elements and electric components if they are damaged by water.
High-precision, rugged brass bayonet mount
The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.
Water and oil repellent coating
Incorporates a water and oil-repellent coating that allows water to be wiped away easily and prevents oil and fat from sticking to the surface, even in challenging shooting conditions. At the same time, the maintenance of the lens surface becomes easier.
AFL button
the AFL button can be assigned with various functions widens the range of operations available on the lens.
Rounded diaphragm
The polygonal shape of a conventional iris dia phragm causes out-of-focus light points to appear polygonal. A rounded diaphragm is designed to pro duce rounded out-of-focus light points when opened to near maximum aperture. This creates attractive bokeh effects in many situations, such as when pho tographing a subject against an out-of-focus surface of water from which light is being reflected.
Nano Porous Coating
The super multi-layer coating is combined with SIGMA's unique coating technology "NPC (Nano Porous Coating)". The lens has been designed to be less susceptible to strong incident light such as backlight.
"NPC (Nano Porous Coating)" incorporates porous silica as the coating material. The porous silica layer has nano-sized holes with air inside. Having holes of this size enables a large reduction in the refractive index, allowing the reflectance to be lowered more than conventional anti-reflective coatings. As a result, reflected light causing flares and ghosting is sharply reduced, achieving clear image quality.
Exclusive low-dispersion glass
The degree to which light is refracted by glass depends on the light's wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as "secondary spectrum" may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD ("F" Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration.
