Lens 'overlap'

KOsey wrote:

I'm new to the forum and hoping for some good advice. I currently have a T3i and I'm about to upgrade to a 6D which will require I also upgrade my 'everyday' lenses. The lenses I will need to replace are my 18-55mm f/3.5-5.6 IS II 'kit' lens and my 55-250mm f/4-5.6 IS II zoom. I have already decided on the EF 24-105mm f/4L IS USM lens and the EF 70-300mm f/4-5.6L IS USM lenses. I'm concerned I won't be satisfied with 24mm for wide-angle shots, so I'm considering also purchasing a wider angle lens and have my eye on the EF 17-40mm f/4L USM. My question is: how much difference will I notice between 17mm and 24mm at the wide end? I realize these lenses overlap some, but my concern is gaining a wider angle. I've looked online at the various wide-angle lenses - both fixed and zoom - and the price difference is huge! Still, I don't want to drop $700 on the 17-40 if there isn't a noticeable advantage over the 24-105 for landscape shots.

Thank you!

I guess you already know that the 24-105 will be wider on the FF 6D than your 18-55 was on your rebel; the 24 on FF being like a 15 on crop, so you will pick up some additional "wide angle" just going this route.  So I would say if you always felt like you needed the 10-22 for your T3i, and you feel you need considerably wider than what you had before then go for it, you will definitely see a difference between a 17 and a 24 FL on the FF.  Nothing at all wrong with the overlap in the 24-40 range, I would prefer some as it might cut down on some lens changing.