Do you think this would be a good upgrade? I have been in turmoil over this for the past couple of weeks.
I have also been debating over the f4 versus the 2.8 IS. Trying to be smart regarding f stop and weight. I don't do 'a lot' of low light, but still would like the ability to shoot low light in the future.
I will be taking on a trip to Yosemite and Northern Cal coast in a couple of weeks, so weight is a definite factor. Thanks for opinions....Janie

