Hehe, I was in the same situation you are in right now!
So, I woke up one morning and ordered a Canon eos 300D kit with the 18-55 Lens and a second lens that was the 75-300 USM
III. I can be very simple about the 18-55.. Don't buy it.
I never used it with spotting. There are just better ones available in a bigger range (up to 75mm or SO to fill the 55-70/75 gap).
About a 300mm. I bought the 75-300 USM
III and I was totally not happy about it.
Simple as that. I didn't got many good results with it, at least not with fast moving objects. Both DTM
and planes potting that was.
If you are on a really tight budget, buy a Sigma 28-300. Not to expensive and all the range you need, but also not very good. Buying this lens will give you time to learn and spent money on a IS
lens (100-400 or 75-300 USM
) or a L lens.
If you are having a little bigger budget, go for the canon 70-200 F4 L
If you have a lot of time spending around an airport, the 75-300 USM
III maybe can do the trick for you to come home with some very descend shots SO now and then. I just didn't had that time to have that with my lens.
Good luck with the hard decisions.
All the best,
Stefan van Hierden