Not enough, that is why I sold. It really is a great lens with good performance but what is it worth if you don't use it enough. That is of course for everyone different.
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I have 2 batteries and don't have this issue.Neither have I
I had the outer focus point problems that you speak of on my 5D3 with the Tamron 24-70. I sent it in 3 times, the 3rd time with my 5d3, and they still didn't correct the problem. They told me that they couldn't find anything wrong with the lens and it tested fine. They finally replaced my lens with a new one, which has the same problem on my 5D. I don't know if it is only on certain 5Ds, or what, since Tamron stated they couldn't duplicate the problem I was having. I'm skeptical about the knowledge of their customer service, though. When I referred to shooting in portrait and landscape ORIENTATION while testing the problem, they told me that I should try shooting in Manual mode.
If you use the 24-105mm as your primary lens I would troll back through your images and see how many of them are in the 70-105mm range from that lens. That would tell you how much you would miss it if you were to sell it.
I have both and still use both. The usage of the 24-105 is now restricted to travel situations where I am without a tripod and/or need the additional focal length.
In any controlled or reasonably lit environment (till the time IS is not required), the 24-70 II certainly trumps the 24-105 in ways more than one (except that it doesn't shoot at 71-105mm).
I'm not considering selling the 24-105 anytime soon.
I am curious if anyone has noticed problems with peripheral AF points on the 5D3 and this lens like those mentioned at http://www.dpreview.com/forums/post/42545234?
Sorry if this has been asked previously.
Seeing no one jumping up and down I decided to test the lens. Sadly, my results are consistent with the above link.
I tested the lens on a brick wall and on some more challenging subjects as well, using aperture priority and three focal lengths: 24mm, 50mm, and 70mm. All shots were made on a tripod using a two second delay. I only tested at f/2.8. Since I was comparing only f/2.8 shots I believe it is a fair comparison. If I want to use an f/4 lens I have the 24-105. I took multiple images (at least three) of each test shot, except the center point shots where I generally only took two.
The results were consistent at the three focal lengths I tested. Using the center AF point of the 5D3 the shots are nice and sharp. They are sharp over the peripheral AF spots as well. Using a peripheral AF point the image is soft throughout. These are sample screenshots of the RAW image at 70mm in DPP at 100% showing the selected AF point.
I would send it into Tamron. Their customer service is excellent and they will fix this for you.
Here's the most complete 70D review i've found for now :
Canon Rumors loads almost instantly on my iPad and on my Win 8.1 PC. I have a 116Mbit/s internet connection and a HP Z800 Dual CPU workstation.
If CR is loading slowly, I suspect the issue is most likely related to your internet connection speed foremost, PC speed cold be a secondary issue causing the delay. Though unless your PC is ancient (6+ years old), I suspect the hardware will not be the issue.