well... all i can say here is it is all about political things during contract bid...
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Except for the low ISO range is the newly announced D5200 a competitor to the T4i or the 7D? I see it as an upgrade to old D90 users but it must have a Canon rival now doesn't it?
You're adding a lot of confusion here by arbitrarily defining your own zero. It's like saying you're going to start counting everything from the number 4, so if there are of 2 of something on a table, you're telling everyone there are 6. Makes no sense.
0 EV has a real, absolute definition - an exposure of 1 s, f/1.0, ISO 100.
Technically, your "0" EV is actually EV = 5. That means your -7 EV is really -2 EV (and in fact, the 6D is spec'd to AF at -3 EV, but of course, that may not equate to real world numbers).
It would help avoid confusion if you restate your numbers according to the real definition of EV = 0, otherwise many people will read that you're testing at "EV = -7" and think you're spewing complete
Sorry, but the fact that you don't seem to understand some of the basics, like the fundamental definition of the basis for the specification you are testing, makes me question what you're doing. I definitely appreciate individual testing (and especially the fact that you did post your definition, so the error could be spotted), but post/blogs like this contribute to the vast and growing pool of bad and/or unreliable information out there.
Various websites are saying the 6D sensor will actually have an advantage in low noise at high ISO vs. the sensor on 5D3.
I have an itchy trigger finger with all the $2500 give-aways on the 5D3. If the 6D were really going to stay at or around $2100.00, it would seem like a slam dunk for buying 5D3, UNLESS the new sensor really is better in low light... I realize the AF seems to have been deliberatively crippled (and overly-so!), but for shooting portraits and candids and casual soccer of my kids, I really don't need the pro athlete or bird-in-flight AF.
Plus, heck, the replacement for the 7D (7D2?) could have a wildly better sensor?
What do CR folks think of this?
I should say you can see my equipment below my name. I shoot portraits and candids of my 7-year old and 6-y-o and my infant. They do/will play some peewee soccer, but nothing challenging for another 6-8 years max! I've never met a bird who would pay fair value for an excelent portrait at 1000 yards, so I don't need too incredible an AF capability.
If your choosing between the 6D and 5D3 based mostly on sensor tech, Be prepared for disappointment.
If you choose based on the metering, AF, ergos, etc... the 5D3 is vastly superior.