Why settle for less when you can capture the cosmos with the Art level 20mm f/1.4 DG DN lens for Sony E, a product of Sigma's relentless pursuit of superior optical performance and rich expression. This bundle comes complete with an 82mm filter kit, 82mm VND filter, lens cleaner, cleaning kit, and lens cap tether, providing you with all the essentials for a seamless photography experience.The Sigma 20mm F1.4 DG DN Art lens, a mirrorless version of the Sigma 20mm F1.4 DG HSM Art, is a pioneer in its field, boasting an unrivaled specification of a maximum aperture of 1.4 and an ultra-wide angle of 20mm. This compact lens offers photographers overwhelming optical performance and unlimited potential for ultra wide-angle creativity.Designed to deliver exceptional F1.4 brightness and breathtaking sharpness across the entire image even at maximum aperture, this lens is the ultimate choice for astrophotography. It captures stars in the sky as clear, precise pinpoints of light, making it an ideal companion for any photographically demanding situation.The state-of-the-art optical design and the large, high-precision double-sided aspheric glass front element allow for the addition of a front filter thread without compromising optical performance or size. The lens also features a rear filter holder and a variety of useful switches, further enhancing its creative possibilities and usability.With 17 glass elements arranged in 15 groups, including two SLD, three aspherical glass elements, and the largest class double-sided aspherical glass element in Sigma's history, the 20mm F1.4 DG DN Art rigorously suppresses various optical aberrations. This results in highly-detailed images with exceptional sharpness and accuracy from the center to the furthest corners.The lens also comes with a Manual Focus Lock (MFL) switch to prevent accidental changes to the focusing distance, and a lens heater retainer to prevent internal condensation during longer night shoots. Its dust- and splash-resistant structure and the water- and oil-repellent coating on the front glass element make it safe to use during longer outdoor shoots.The Sigma 20mm F1.4 DG DN Art lens is not just about superior optical performance, it's also about usability. With a focus mode switch, a customizable AFL button, and an aperture ring lock switch, this lens enhances your photography experience. The robust body is built from a combination of aluminum and Thermally Stable Composite (TSC), giving it a sleek finish, and the included petal-shaped lens hood is equipped with a lock mechanism to keep the hood securely fastened to the lens.In conclusion, the Sigma 20mm F1.4 DG DN Art lens is the ultimate choice for astrophotography and other high-end applications, offering photographers an exceptional experience with high-end results even in the most difficult conditions.