So let's have a look at premium zooms, they often have a narrow range. So, for instance, I've got the 16 to 35 millimeter f4 canon, which is an L lens, it's very high quality as a premium lens, I've got the 2470, and I've got the Sigma 70 to 200. The 7200 I have an S 2470 have a fixed low aperture, so they choose an F 2.8. All the focal lengths cheaper zooms will start f two f 3.5 when you're at 50 millimeter, and then when you get to say, you know 80 millimeter, you'll find that your camera can only use f 5.6. So you'd lose that light. So the more expensive lens tend to be a fixed low aperture, which means you can shoot a bit more wide open, you've got more stops of light coming back to what I've been talking about, and they tend to be better Build quality but like I said earlier, start with a budget stuff, learn how to pull those levers for you go out buy loads of expensive lenses, and it gets expensive very fast, and you'd be amazed what you can do with the cheap lenses.