For me, this is why I am considering the 6d over the 5d3 as a backup/secondary body. This is only my second season shooting weddings. So my income is not at the level it should be, and I want my shots to be as good as they can be. So a secondary body is needed, mostly so I can get 2 uniquely composed shots without having to run to the bag to swap lenses, and also for the piece of mind a second body gives you (the good old just in case!) From that perspective, the mk3 gets a big extra point because then I have no falloff in capabilities. Now lets add in the other factors. I am currently using the older non-IS 70-200 2.8. I am interested in upgrading to the v2 IS because IS would improve my keeper rate at the long end, and give me more flexibility in Shutter speed. I'm also considering options with my 24-70 v1, seeling it and upgrading to the v2, or, fill in the gap with another prime (either the 24mm or the 35mm). I would also really like to snag a 135 f2...
I can't make bold moves with glass if I spend 3k on a body, an mk3 now means no new glass until the end of the season or next season (and in theory, I could do a 6d now then glass, then sell the 6d over the winter and snag a used mk3)...
Add in another factor, I am getting married this year, and weddings are freaking expensive!!!!!!
So whats the better option, a 5d3/6d combo with top end glass? Or, 2 mk3's and no moves on glass?
You suggest the perfect solution yourself 6d now, then glass, then sell the 6d over the winter and snag a used mk3.
The 6D is pretty good (I don't think I need to tell you that) but it appears a compromise over the 5D3 - though in reality it might not be a compromise at all for shooting weddings ... after all prior to the introduction of the 5D3, more than half the weddings were clicked with the good old 5D2 and the 6D is even better.
BTW, do you feel a used 5D2 will not suit your purpose as a backup / second body? Why not get a used 5d2 AND glass right now - I would say better glass would improve IQ more than a 6D over a 5D2.
It's entirely my opinion, Skirball may differ
Cheers ... J.R.
I considered a 5d2 (have been actually since before there was a 6d). The 5d2 is a great body, but, its so close (used price even) in price to the 6d that it's a hard sell (LOL, b&h still has new 5d2's with a price tag of 2199!!!!) my fear in buying a 5d2 would be that it would sit in the bag for the vast majority of the day - it would get lots of use for outdoor ceremonies, but indoors I can see myself heavily favoring the mk3 (leaving the mk2 as an expensive lens holder). I just sent a rental 6d back to lensrentals... I had kind of hoped that using a 6d would give me more reasons to opt for the mk3, but, I was pleasantly surprised, which makes the decision that much harder because it is a fun little camera to use (and yeah, weight is a factor, i rather like the idea of being able to switch to the 6d later on in the day - lighter, easier to move and yeah, deep into the reception at weddings the weight does become an issue). It does in fact do quite well at the high ISO's too, and I like to do a combo of natural light, on cam light and off cam light --- I think the 6d outshines the 5d2 for those situations (thinking reception, ambient light, 16-35mm lens...center point is just fine for that kind of stuff!)
Edit: I will admit, at MAP price ---I would not opt for a 6d at $2099...the biggest reason I am considering it is because B&H is still offering it at $1779. IF i can find a refurb 5d3 for $2400 then that is what i get (it would make my glass plans more difficult, but still possible), but at $2800 used, and $3100 new...that would end up being the only gear move I made this year...