One of the most noteworthy features of the Sigma 10-18mm f/2.8 is its ability to offer an extra stop of light compared to Sony’s 10-18mm F4 lens while maintaining a similar size. This lens boasts the widest-angle perspective for Sigma’s APS-C lenses, providing a full-frame equivalent focal length of 15-27mm. This versatile range is ideal for various applications, especially for 16:9 video with its top and bottom crop of the frame, making it a must-have for landscape photographers.
The Sigma 10-18mm lens pairs beautifully with the Sigma 18-50mm f/2.8 DC DN lens, covering an equivalent 15-75mm focal length with a constant f/2.8 aperture, all while maintaining a combined weight of just 550 grams. The value of these lenses becomes apparent when compared to their full-frame counterparts, which tend to be larger and heavier. This showcases the advantages of the APS-C format.