hollis_f wrote in post #17307774
Yes. I bought a new car and the seat was too low - so I sent that straight back. They suggested I tried turning the knob to raise the seat, but that doesn't sound reasonable with a new car.
For what it's worth, I don't think that's an appropriate analogy. I posted this on fredmiranda.com discussing the same issue that I think is more appropriate:
Out of curiosity, if you bought a brand new car with fuel injection, and they gave you a little knob to tune the mixture, would you want to drive a car off the lot that NEEDED to be tuned right off the bat?
That's how you lose customers, not keep them. You can't have a crappy out of box experience...its death in consumer electronics, especially in the internet age. How many people deferred purchase of this body because of threads like these? If your product gets a bad rap these days you're toast...even if it isn't deserved.
This is why canon needs to make sure--to the extent they can--that your first picture is in focus IF the camera says its in focus...not a foot in front.
After all, the 7d2 MANUAL says that MFA normally isn't necessary. E.G. It is not normal that one should need to spend four hours dialing in your lenses to get a focused picture.
I read somewhere that each tick in the MFA interface is equal to 1/8 of a DoF unit. I have no way to map this to the degree to which a lens/body combo fits in the tolerance stack up calculation between all the mating parts in the assembly, but I would suspect that tolerance stack ups resulting in "nearly out of spec" values would still result in "decent" focus....otherwise Canon's acceptable tolerances would be unacceptable.
My first shot out of the camera was OOF by at least a foot. That was rather extreme, and I sent the camera back.
Another factor in this is the effect of temperature on all the mating parts. If the nominal operating range of the camera and lens is (for example) 50*C, I would expect that the camera can take good pictures within that range. If I need to MFA my lens to +17 to get an acceptable shot, where does that leave me next time I take a picture when the temperature is different by 20*C?
Anyways, here's to hoping body #3 will be better....