Sigma C 28-70mm F2.8 DG DN Leica-L [28-70mm F2.8 DG DN (Contemporary) Leica L Mount]

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Number of lenses configuration 16 pieces 12 groups (2 FLDs, 2 SLDs, 3 non -sphere lenses) angle of view 75.4 ° ~ 34.3 ° Number of squeezed feathers 9 pieces (circular aperture) min imum aperture F22 The shortest shooting distance 19 (W) -38 (T) cm Maximum shooting magnification 1 to 3.3 (w) -1 to 4.6 (t) Filter size φ67mm Maximum diameter x length φ72.2mm x 101.5mm Mass 470g Edition number C021 Accessories With Food (LH706-01) Installed technology A brass mount that combines high accuracy and robustness.In order to withstand long -term use, the surface treatment has been applied to enhance strength, and high -quality lenses are realized. Mount is adopted rubber sealing to protect the mounting part that is most worrisome about intrusion of garbage. Water repellent and anti -fouling coating that can easily wipe off water drops and prevent fats and fats from adhering.It will help you use comfortable use in harsh situations and to maintain the lens surface. Normal specification polygon aperture is also designed so that the blur of the dotted source is also multifunctional when squeezed, but the circular aperture is designed so that circular blur can be obtained near the opening. Sigma's unique coating technology "NPC (nanoporouscoating)".It is less likely to be affected by strong incident light such as backlight. Since the refractive index of the glass differs depending on the wavelength of light, the phenomenon in which the imaging points are shifted for each color are called chromatic aberration.It is easy to appear strongly with telephoto lenses, causing image quality. Show more