I know the question been asked loads times .
i curently have 30d and been using 100-300 for when i go to bike racing.
After using this lens for other things like zoo i find myself really wanting 70-200.
I will prob go to racing about 4 to 5 times through year so can get tcon for that but cant make me mind up which lens .The f4 is lighter for when walking around with kids which is what it will be used for majority of time .When i look at sample pics the f4 seems to be sharper to me as well ?
but when i go racing the 2.8 would be better using with tcon .
has anybody got pics of bike racing with these combos please bear in mind i using 30d as i think some of the latter cameras helping pics.
cheers shane
