When anyone asks for a recommendation here for a zoom lens and the budget will stretch to an f2.8 version of a suitable lens, the expensive (once only owned by the very few) f2.8 lens is almost always suggested. I get that on average they are of very high quality and good in low light, sharp etc. I do think though that especially for full frame camera owners now, that have ability to shoot at higher iso with less penalty than before that it may not always be the best option. If for example a fullframe owner wants a midrange zoom and will use it for general photography and portraits and has 1000 dollars, you can be sure some version of a (often quite large and heavy) 24-70 f2.8 will be high on the list. This is probably an excellent choice, but, would an equally excellent choice be a zoom that cost half the price, has a slightly smaller aperture, but allows the person to also purchase a good speedlight and tripod. Just a discussion,What do you think here- there's no right or wrong answers?