Slightly off topic but I think it is important.
When buying lens, it is an investment and it can be an expensive one. A good lens can last you many years (We are talking about 5-10 years) so, firstly, when buying, go for a quality made lens.
Secondly and most importantly, there is a saying that the poor man always pay twice and this is a common pitfall when it comes to photography because we tend to settle for the next best within our budget when an event important to us, pushes the buttons in our brain to buy.
But we don't have to buy NOW if we don't have the money. Renting makes much better financial sense than buying because by the time we sell off our make shift purchase, it easily depreciates 20% from NPP (New Part Price) which could be equal to the rental cost but you get better quality photos from using the right lens (Right tool for the right job).
So, if you are into this gene of photography for the long haul, rent a good lens, save the money and when the time comes, buy it so you wont have to pay twice for it.
IMHO from the stand point of a serious enthusiast, unfortunately, the isn't one lens that can do 70 to 300mm all in one.
Suitable ones at about 3k and below as follows (Prices as estimated with local warranty):
1) 300mm f/4D AFS - Old model lens but works great and continue to do so and cost slightly above S$2,000. It is light weight and can be hand held as compared to its heavier and 3.5 times more costly variant, the 300mm f/2.8G VR II
2) 70-200mm f/2.8G VR II Great lens but very costly at slightly over S$3,000
3) 70-200mm f/2.8G VR I
4) 70-200mm f/4G VR III
5) TC-14E II Tele-converter (Good addition to add reach to the 70-200 series and to the 300mm f/4D. When added to the mentioned lens, shoots can be done wide open without having to be stopped down with a 5% loss in sharpness)
Hi, I will be gg Formula 1 race this yr, sitting at the floating bay.
I intend to get a zoom till 300mm lens on my D7000
There's only 3 option of lens for mi to choose (due to budget) can advise mi which lens is better.
1) 18-300mm f/3.5 VR
2) 28-300mm f/3.5 VR
3) 70-300mm f4.5 VR