I dont know what happened since we last posted, however if you need to send equipment in to make sure it's fully up to par with Canon, great... however after that point, it may not be an equipment problem but a user problem if it still exists. ...As i've said in other posts, if you or anyone have questions, feel free to ask and or email me before giving up on a camera which may or may not be the problem.
Thanks for the detailed response Awin. If my post seemed to be exuding frustration, it's because it was.
I've just seen enough of the "you-just-don't-understand-the-ultra-advanced-7D-to-use-it-properly" comments strewn about the internet on this issue, and I have little to no patience for them; regardless of how "helpful" the poster's intent may be. With respect to additional details, I've sent the body back twice now. The first service resulted in no change, while the second trip proved to establish consistent and tack sharp focus with my 2 kit lenses (28-135 and 18-55) and my L series 70-200 f/2.8 II.
Curiously, the problems remain with my 50mm. MF adjustments fix the problem, but, and this is where it gets really weird, for only a short period of time. After a random time period (sometimes a few minutes, a few hours, or even a few days), the focus goes bonkers again. I explained this to the Canon service tech., and he was baffled. Now, both my 50mm and the 7D are at Canon Irvine (at this very moment) to try to get to the bottom of this.
The saddest situation, however, is my Tokina 11-16mm. No type of MF adjustments can fix this baby. When paired with the 7D it is just a total nightmare. Focus is sometimes spot on, and then sometimes totally out the window. There appears to be no rhyme or reason as to if/when/where it will focus, and it's driven me to madness. Selected points will "lock" focus with 100% consistency, it's just that the resultant photo is rarely actually "focused" (a total mish-mash of front/back focus). After a visit to THK service in California, the lens returned with a note saying "no work required - meets all manufacturer specifications." I even called and got to speak with a Tokina tech. directly who said the 11-16mm should have no issue pairing with the 7D. I've sent this letter/info on to Canon with its latest service, but not the lens, since I'm sure they won't touch non-Canon lenses. This is the same 11-16 that performed flawlessly on my 40D. So, to me, this seems very very bizarre.
Anyway - that's where I'm at. 3 of 5 lenses are now great. 50mm is so-so, but unreliable enough to be useless on paid gigs. Tokina 11-16mm is totally useless, and will probably be sold if there are no improvements after the latest 7D service visit.
However, I am more hopeful now than I have been regarding my future with this body. A recent shoot at a nearby racetrack with my 70-200 has really boosted my spirits. Even at 160th with AIservo and panning, she grabbed focus superbly. >> http://www.akphotodenver.com/client/mra711/download/7Dhope.jpg
Hopefully, all gets corrected in time. I'm not bailing on Canon, or this body, just yet. I'll keep you posted.