Photographers and engineers have always dreamed of wide-aperture standard zoom lenses that can rival prime lenses – without being enormous beasts. Could there ever be a lens that combines the versatility of a standard zoom with the impressive aperture of a prime lens while maintaining a practical size and weight for professional photographers who might otherwise opt for a 24-70mm f/2.8?
There have been some notable entries in this category – Sigma's 28-45mm f/1.8 DG DN Art offers a prime-like f/1.8 aperture but sacrifices some focal length. On the other hand, Tamron's 35-150mm f/2-2.8 Di III VXD provides a broad focal range but cannot maintain its maximum aperture throughout.
