What are your thoughts about this on a 7d? I know without it, I have a effective range of 28-75 FF equivalent. But sometimes outdoors I would like to have a little more reach. So was considering a 24-105, but got to thinking with a 1.4x converter I would get the extra reach being approx. 45-120 f/4 if my calculations are correct. I think it would be a better combo, rather than lugging around another lens. If I needed wide and fast use the lens normal and when I need that touch more reach, pop on the 1.4x and good to go. I know IQ may suffer some, but will it be that great of a concern that can't be overcome in PP. All your thoughts are appreciated and thanks.