With the 2470GM, is it necessary to add a super wide-angle lens?

It is recommended to give priority to purchasing a fixed-focus lens with a large aperture, 20F1.8 is optional, and of course there are many other similar options. Because in most cases it is okay to use the 24-end shooting style. If the scene is not enough, in fact, in many cases, panoramic shooting can be used to make up for it. However, when shooting starry skies, the field of view and aperture of 24mmF2.8 are obviously not enough, so you should give priority to purchasing a large-aperture ultra-wide-angle lens to supplement the 24-70GM. Among the lenses you mentioned, the aperture of the 16-35 has not been improved whether it is F4 or F2.8, and there is a certain focal length overlap (24-35mm). The aperture of the 24F1.4 has been significantly improved, but the field of view has not been improved. open. So in comparison, 20 F1.8 is obviously a better choice considering the two needs.