The Tamron SP 35mm f/1.4 Di EF Mount is a high quality prime lens with an impressively bright f/1.4 maximum aperture and an Ultrasonic Silent Drive autofocus motor for quick and precise focusing performance. It features a Dynamic Rolling-cam mechanism that also contributes to swift focusing movement, even in harsh lighting conditions with a wide open aperture. Tamron gave particular attention to eliminating the on-axis chromatic aberrations that normally plague fast-aperture lenses. Sagittal coma flares are controlled, making this lens a great option for night sky landscapes. The Tamron SP 35mm f/1.4 Di USD Lens represents the best of Tamron's optical advancements and is an ideal lens for portraits, street photography, landscapes, nightscapes, and everyday shooting of events, pets, and more.