Sigma 28-45mm f/1.8 DG DN Art Lens | Sony E

The Sigma 28-45mm f/1.8 DG DN Art Lens is the world’s first f/1.8 zoom lens with a constant f/1.8 aperture for 35mm full-frame mirrorless camera systems. Developed as a full-frame successor to the SIGMA 18-35mm F1.8 DC HSM | Art (for APS-C DSLR cameras), which in 2013 became the first lens in the world to achieve f/1.8 throughout the entire zoom range. While offering the convenience of a zoom lens, it does not compromise on optical performance.   By effectively arranging 3 aspherical lens elements and 5 SLD glass elements, this lens suppresses various aberrations and achieves performance comparable to prime focal length lenses, even surpassing the SIGMA 24mm f/1.4 DG DN | Art and SIGMA 50mm f/1.4 DG DN | Art, which have an established reputation for their optical performance. In particular, the 28-45mm f/1.8 DG DN | Art focuses on suppressing axial chromatic aberration, which is often noticeable in large-aperture lenses, to achieve images with minimal coloration on both the focus plane and bokeh, and to demonstrate high optical performance from open aperture.

Design and Performance

This lens is meticulously designed to deliver exceptional optical performance, consistent with the high standards set by Sigma's Art series. The inclusion of 18 elements in 15 groups, featuring three aspherical elements and five Special Low Dispersion (SLD) elements, ensures the minimization of optical aberrations such as flare and ghosting. This sophisticated arrangement enhances image clarity and sharpness, making it comparable to or surpassing other Sigma Art lenses, including their prime counterparts.

The lens's optical design is further complemented by an 11-blade rounded diaphragm, which contributes to the production of smooth, aesthetically pleasing bokeh, especially when shooting at wide apertures. The f/1.8 maximum aperture is particularly beneficial for low-light situations and for achieving shallow depth of field effects.

Additionally, the lens boasts a minimum focusing distance of just 11.9 inches (30 cm) throughout its entire zoom range. This feature, combined with a maximum magnification ratio of 1:4 at the longest focal length, allows photographers to capture detailed close-up shots, enhancing versatility in various shooting scenarios, including tight spaces.

Overall, this lens is engineered to cater to photographers who demand superior optical quality, flexibility, and creative control, making it an excellent choice for a wide range of photographic applications.

Video Production

Designed with video creation in mind, the lens' bright f/1.8 aperture and wide-to-normal zoom range make it a versatile tool ideal for single-shooter, run-and-gun setups. An internal zoom design maintains the overall length during use, making it easy to balance on gimbals. The design also suppresses focus breathing for smooth movement across the focal range. Sigma's high-speed, high-response linear actuator autofocus remains both quiet and accurate, while manual focusing is improved with click and lock mechanisms.

• Two AFL buttons
  
  
• Focus mode switch
  
  
• Super multilayer and nano porous coatings
  
  
• Water- and oil-repellent coating on front element
  
  
• Dust- and splash-resistant design
  
  
• Durable brass bayonet mount