Trying out the Sigma 150-600 and 60-600 lenses this weekend. A moose was kind enough to say hi! (Shot at 900mm equivalent with a slight crop to cut out distraction)
Apparently this is what I have been looking for, the 400 )600mm equiv) was never really enough for most birds on walks.
@haskar thanks, and I understand about long lenses. I rented a 4.5lb and 6lb lens fully expecting to like the lighter one better, but I am leaning the other way after seeing how handy it is to have a 60-600 with a built in 200m macro.... Pretty much replaces my whole bag short of wide angle. . . In weight and focal range!