SIGMA 56mm F1.4
DC DN | Contemporary
• Compact, léger et d’une qualité d’image remarquable
• Un téléobjectif modéré pour appareils sans miroir APS-C
• NOUVEAU pour la configuration Canon EF-M
• Un AF sans à-coups, idéal pour la prise de vue vidéo
• Qualité d'image rivalisant avec celle des objectifs de la gamme Art
| Ligne | Contemporary |
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| Klevu Image | /p/r/product_img01_16.png |
| Formule optique | 10 Elements in 6 Groups |
| Lens Type | Telephoto |
| Angle de vue | 28.5º |
| Diaphragme | 9 (Rounded Diaphragm) |
| Ouverture minimale | F16 |
| Distance minimale de mise au point | 50 cm |
| Rapport de reproduction maximal | 1:7.4 |
| Dimensions (diameter x length) | Sony E-mount ⌀ 66.5 mm x 59.5 mm |
| Poids (gramme) | 280 |
| Diamètre de filtre | 55mm |
| Edition number | C018 |
| Accessoires | Hood (LH582-01) supplied |
| EAN | Sony E-mount 085126351656 |
LENS CONSTRUCTION
GEOMETRICAL MTF Chart
DIFFRACTION MTF CHART
Compatible with Lens Aberration Correction
Matching the optical characteristics of the lens, this function performs in-camera corrections of peripheral illumination, chromatic aberrations, distortion, and more, to further enhance image quality.
*Function available on supported cameras only. Available corrections or auto correction functionality may vary depending on the camera model.
*On cameras where lens aberration correction is controlled with 'ON' or 'OFF' in the camera menu, please set all aberration correction functions to 'ON'(AUTO).
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.
Mount with Dust and Splash Resistant Structure
The lens mount incorporates rubber sealing to protect the mount from dust and water drops.
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.
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.
