By combining the 11-20mm F2.8 and its balance of excellent portability and high image quality with the 17-70mm F/2.8 Di III-A VC RXD (Model B070), the combination of these two lenses covers an extreme range of focal lengths from 11mm to 70mm (equivalent to 16.5mm to 105mm on full-frame cameras) with a fast, wide-open aperture of F2.8. The combined weight of the two lenses is only approximately 860g (30.3 oz). Drastically reducing bulky size and weight can greatly lighten the load during shooting and transportation and is convenient during travel when you want to reduce the size and weight of your camera bag as much as possible. Additionally, like most of the TAMRON’s other lenses for Sony E-mount cameras, the filter size is unified at 67mm. In addition to allowing the shared use of PL and various other filters between lenses, the unified size is also highly convenient as it eliminates the hassle of finding the right lens cap when switching lenses. With these two lenses covering a broad angle of view, users can easily enjoy photography spanning various genres from portrait work to tabletop photography and landscapes. Have it all!