Bird Companion
Member

Hi, having read some articles regarding this question it looks like a 500 with IS would be the better choice. But, I sure like the reach of a 600. Using the 600 might make the use of an extender less likely so the f/4 could be taken advantage of more often. If there is someone out there who has actually had the opportunity to compare these two lenses it would be great to hear what you think. Both of these lenses would be used. I would purchase "L" series Canon lenses that seems to me to be the best choice considering my minimal experience. Or, if someone has a suggestion about something better? Thanks for any light you could shed on this. Chris