While I agree with Dan about the quality of the 2x extender, if it comes down to you having more focal length with it, I'd still go for it KNOWING ahead of time that your quality is going to be degraded quite a bit. If you already have the 70-200 lens and can't afford a 100-400 just yet, I'd still probably go for it.


Maybe even tone it down to a 1.4, that way you're quality won't be quite so degraded.


Do you already have the 70-200?