I plan to buy a 6D with 24-105 f/4L kit lens as an upgrade to a much lighter PnS with lens of similar FoV range that i currently use.
I realize the value this kit lens offers, both in price and the flexibility to determine what FL primes i (may) gravitate to over time.
However, i am anxious that it's weight may dampen my enthusiasm and hence contemplating a lighter 6D start point.
I have two questions
1. AF sensor
What perceivable impact does the f/4 kit lens impose, given that 6D's center x-point sensitivity is f/2.8?
Surely prior 5D bodies did not have a more forgiving f-stop requirement for AF?
The 24-70 f/2.8 L I or II is no lighter (and shorter and costlier)...but (on a 6D) is it noticeable more responsive for AF and in low light?
2. Your experience
If you moved away from this initial kit lens onto others, what constraints/findings led you to do this and to what alternatives?