Hi,

I have a few lenses that I love for my 40D (50mm f1.4 being my favourite). Want to try some birding with my daughter, and need a decent but not too expensive longer lens.

I have a friend with to 100-400 mk ii on a 5D which takes beautiful shots, but at $2500, is out of my range..

the mk I, looks fine.. but I'm wondering now if I should consider the 70-300 given it's newer, a little cheaper at about $1400 and at 300mm I'll be getting an effective 480mm anyway .. right?

Any thoughts/advice will be appreciated.

Cheers,
Clinton