Anytime someone presents a long list of "must haves" everyone tends to leave the building.
Because that much data can not be found in one or two locations.
Some of it is may not be available at all.
I am going to approach it from a different angle.
Even then, it is not a solid answer.
1. By the fact you want a camera with Electronic View finder, you have eliminated all DSLR cameras.
A true DSLR will have Thru-the-lens optical viewfinder.
2. Battery life of 500 or over hours requires a large battery. A large battery requires a large body.
So, you have eliminated all small cameras.
That just leaves the family of so-called mirror-less cameras.
Here is a comparison of such cameras:
http://www.dpreview.com/articles/8986630048/mirrorless-roundup-2011
The Panasonic GH2 seems to have what you want.
But some items can not be verified.
It does gives you a starting place.
Good Luck.
..
I have been doing a lot of research lately and finding many cameras very close to what I am looking for, but not quite perfect. First, I am a specialized photographer by training, and use Nikon D300 and D200 models at work. I wouldn't mind getting a D300S, but would rather wait for them to come down a bit more in cost. Through my formal photography training, I realized I really enjoyed it. I own a few point and shoots, but have been using my 2004-vintage Nikon Coolpix 5400 most (back from retirement!) since I like it's limited manual controls. What I am looking for is a digital camera, no matter whether DSLR, ILC, or even point and shoot, with the following MUST-HAVE features:
1. Manual Controls
2. Low noise ISO range up to or above 3200
3. Continuous shooting of 6 fps or faster at full resolution
4. External means to control shutter (acc. port or IR/RF)
5. Excellent function in low-light with Auto settings
6. Good battery life (500+ shots)
7. 10mp or higher
8. HD video capable
9. Continuous and Manual focus
10. Ability to turn off display screen
11. Minimal lag if it switches automatically from screen to EVF
12. FAST(!!!) auto focus
Prefer to haves:
1. Internal flash
2. Hot shoe
3. Weatherproofing/Ruggedized
4. Zoom or lenses available up to 400mm equivalent
5. ISO down to 100
6. 1080 HD video
7. Electronic View Finder (EVF) with 100% coverage
8. Body-only <$1,000
Right now, the frontrunner seems to be the Olympus OM-D E-M5, but it's not even out, yet, much less thoroughly tested. I don't mind waiting to buy, though. I've also started reading about the Nikon 1 V1.
Thanks!

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