« on: December 05, 2013, 09:35:02 PM »
The 5D3 is a great camera but not worth (at least to me) the $3400 price tag. After reading people's thoughts and reviews I was expecting a powerhouse of a camera, and it really wasn't. I just couldn't justify spending the money on it to upgrade. The 7D is a VERY fast camera and very hard to beat in that department. I shot BIF (birds, raptors exactly, in flight) with the 5D3 and got 10 times more blurry bird shots than I did with my 7D! (Yes I KNOW how to set up my camera for birds in flight, I am NOT new to this! Please don't waste your time telling me how I didn't know what I was doing... I always select the center point on AF and use AI Servo...) I was also using my own EF 70-300L on the 5D3. That lens is lighting fast on AF, so I know the fault wasn't with the lens.
Not trying to start a fight here but.... you definitely didn't have the 5DIII AF set up correctly for the type of shooting you were doing (or something else was going on). I have shot extensively with Rebels, 7D, 1DIV, 5DII and 5DIII for BIF... hands down the 5DIII is the best out of all of these regarding AF speed and accuracy. The 7D does have a very good AF system but once you get the setup right on the 5DIII it is nothing short of amazing.
Regarding the OP. Glad you sorted out your priorities. It sounds like you are looking for some justification for your decision from the forum and there are definitely a lot of people who think along similar lines. The 5DIII is a fully customizable workhorse and for many shooters it is certainly overkill. The cameras you are using are great and will not hold you back from making great images. Happy shooting.
Canon1, would you please share your setup for the 5DIII? I have been shooting with the 6D and I am not happy with it's AF, particularly it's slow focus lock time using a 70-300Lens. My 60D is much better.
So I intend to sell the 6D and buy a III. I shot a lot of birds and think I will be much happier.
Sure. This is what works for me:
Tracking sensitivity set to "-2": I use this setting most of the time. Once I acquire focus on a BIF this setting helps to keep it locked on despite whether the focus point moves off the bird for a moment or another bird passes between the desired subject (or a tree passes between as the bird flies by, etc...) This can slow down the initial acquisition s tiny bit but is un-noticable on ast primes. If using a slower AF lens like 100-400 then you can bump this setting to "-1"
Accel/decel tracking set to "+2": Many birds are erratic in flight, this helps keep lock on. (not as big a deal with slow subjects like geese but this really helps with fishing terns, etc...
Af Point autoswitching: I dont care about this setting. I don't use 61 pt AF Auto selection...
I also very frequently use 4 point AF Expansion. When shooting BIF that don't fill much of the frame it can be difficult to get the center point over the BIF to acquire intitial lock. Using 4 Point expansion really helps especially when shooting handheld and not from a gimball head.
Should go without saying that camera is also in AI Servo and high speed burst and all lenses calibrated with focal pro....
Hope this info helps.
Looks like you and I have same setting here
AI servo, case# 2, 4-8points expansion.
Keeper rate is high, as you can see here: http://albums.phanfare.com/isolated/t302HPVC/1/6306064
Out of 61 AF points, I only activate 41 cross type AF points and 5 dual cross type AF points on both of my 5D III.