[john-f]

This is my first time using this forum so hi to you all.
If I could ask for some help on lens choice. My idea is to use a Sigma 70-200 2.8 zoom and a Sigma 2x converter to give a greater range but have read some good reviews in this forum for the Sigma 80-400 and 50-500 can anyone help me out. I have seen the 70-200 at less than £600 but the 50-500 just a few pounds more.Although I have yet to find the 80-400 at an affordable price. Hope some help is out there.
Thanks