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Sigma EF 50mm f/1.4 DG HSM Art

עדשת פריים מסדרת ART היוקרתית של חברת Sigma. לעדשה 50mm צמצם פתוח במיוחד של 1.4. בנוסף, לעדשה מנוע פוקוס אוטומטי מהיר ומדוייק, חדות מרשימה גם בקצוות הפריים, אלמנטים SLD ו- FLD עם ציפויים חדשניים אשר תרומים להפחתת העיוותים בתמונה תוך כדי שמירה על תמונה נקייה ורוויה בצבעים.
  • EF Mount Lens/Full-Frame Format
  • Aperture Range: f/1.4 to f/16
  • FLD and Special Low Dispersion Elements
  • Two Aspherical Glass Elements
  • Super Multi-Layer Coating
  • Hyper Sonic AF Motor
  • Full-Time Manual Focus Override
  • Rounded 9-Blade Diaphragm
  • Thermally Stable Composite Material
מק"ט LNS-SI50
כמות:

The Canon EF mount Sigma 50mm f/1.4 DG HSM Lens is a fast standard-length prime designed to achieve high optical performance through the incorporation of both three Special Low Dispersion glass elements and one molded glass aspherical element. These elements, coupled with an advanced optical design, work to minimize sagittal coma flare and chromatic aberrations in order to provide high image sharpness and clarity. The lens' large diameter and floating system also help to correct for vignetting to ensure maintained peripheral brightness. A Super Multi Coating has been applied to lens elements, too, to reduce flare and ghosting for higher contrast and color fidelity.

Lens Construction

Complementing the optical performance is an equally adept Hyper Sonic Motor, which provides fast, smooth, and near-silent autofocus performance. This focusing motor also enables full-time manual focus override at any time just by rotating the focus ring for refined manual control and focusing as close as 10.9". The lens barrel is constructed using a Thermally Stable Composite material, which supports working in a wide variety of temperatures and conditions, and the lens mount is constructed from brass for long-term durability and mounting accuracy. Additionally, this lens is also compatible with the optional Sigma USB Dock for fine-tuned control over focusing parameters and other lens characteristics.

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.

Focus

  • A large HSM, AF with full-time manual focus and all of SIGMA’s latest design and manufacturing technologies help deliver an entirely new visual experience.
  • The large hypersonic motor (HSM) delivers ample torque to the focusing group for outstanding speed, ensuring exceptionally stable performance even at lower speeds. Along with the optimized AF algorithm, this feature delivers fast autofocus photography.
  • Full-time manual focus function allows the lens to be switched to manual focus simply by rotating the focus ring.

 

 

אופטיקה

Mount

EF

Focal Length

50

Aperture

f/1.4 to f/16

ממדים

Weight

815g

מכסה עדשה קדמי ואחורי
קייס עדשה

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