Dear Ben, The best Canon flight photography combo is EOS 50D + EF 400mm f/5.6L USM. Arthur also likes this although he suggests a better but pricey lens like EF 400mm f/4L DO IS USM if possible.

In any case, the first combo suggested above is the best for enthusiasts like you and me and this is endorsed by most of the gurus. Personally I found it very effective. Here’s a shot of mine: http://www.flickr.com/photos/sanjeed/5583935074/in/photostream

Rgds.

Good Afternoon Arthur. Hope you are fine.

Are you, by any chance, planning to throw some light on the current hype of mirrorless cameras? I’m little concerned about the impression of some that those might replace the APS-C sensor DSLRs that we are using at present.

May I request your take on this?

Thanks in advance.