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Message: <blockquote data-quote="MalR" data-source="post: 1310124" data-attributes="member: 38501">I bought the Canon 70-300 zoom to fill the gap between the kit lens I got with my 40D and the Canon 400 F5.6 that I bought as my main birding lens. I must say I think the zoom is a decent lens, although obviously it doesn't perform as well as the 400 prime. But then again, it's only half the price.I've attached three examples of different subjects, all taken with the 70-300. Hopefully they will give you some idea of its quality. The stonechat picture was taken using the non-reporting Kenco 1.5 TC. So, this lens will take a TC, but I must say autofocus does struggle at times, and I have missed quite a few shots because of that.Overall, I wouldn't say it was a good choice as a main birding lens, but it is a decent quality lens, considering it is not an "L" lens, and it is very versatile. Its close focus is just under 5ft, compared to about 11ft for the 400mm prime, and of course it has IS.Hope this is of some help.Malcolm</blockquote>