billnourse wrote:
... have been waiting for it as I want to go from 70d to full frame....
Why? What do you think "full frame" will do for you and your photography?
Let's see... FF will require different lenses and there will be fewer choices. A FF camera will only be able to use EF/FF-capable, while your 70D can use both EF and EF-S lenses. FF-capable lenses are necessarily bigger, heavier and typically more expensive, too.
Do you make 16x20"and larger prints a lot? If so, FF might be for you. If not, you might be the only person who ever notices any difference, and then only when viewing your images at high magnifications on your computer monitor.
Are you looking for about one-stop's worth greater background blur (i.e., pretty much the same could be accomplished with a stop faster lens) or do you need to be able to use about one stop smaller aperture before diffraction is a concern (i.e., f11 instead of f8, for an 8x10 print)? If so, FF might be what you want.
Or, are you looking for one or two stops higher usable ISOs for especially low light shooting? If so, a FF camera might be ideal.
But if none of these are major benefits to you a $1200, 24MP 80D might be a better "upgrade" for you, than a $3500, 30MP 5D Mk IV.
I am not saying "Don't do it". I'm just saying go into it with reasonable expectations.
The 5D MK IV does appear to inherit a slightly improved 61-point AF system from the 1DX Mk II.... but be aware that the 1DX II uses a separate chip to run the AF (as well as dual processors to handle its 20MP images at up to 14 frames per second). The 5D Mk IV appears to be using a single Digic 6+ processor for everything (up to 7 fps). The main improvement with both cameras appears to be f8-capability at all 61 points (earlier models had f8 capability only at the center point). I have not compared the configurable focus patterns of the 5D4 vs 1DX2. Wouldn't be surprised to find that 1DX2 offers more.
The primary difference between 30MP 5D4 and the 50MP 5DS/5DS-R, besides the resolution and AF systems, is that the latter
are not particular low light/high ISO capable or video capable cameras. The 5D4, on the other hand, is especially designed to excel at both. The 5DS/5DS-R ISO range is 100 to 6400, expandable to 50 and 12800. On the other hand, the 5D4's ISO range is 100-32000, expandable to 50, 51200 and 102400.
Note: The 5DIII actually offers the same ISO range up to 102500, that the new model does. However, it's native range tops out at 25600 (vs 32000) and, perhaps more importantly, one needs to compare the
usability of the respective models' higher ISOs. Presumably and hopefully, 5D4 will see improvements similar to 7D Mark II and 80D, where high ISOs are significantly more usable. For example, coming from 7D to 7D2... I have been able to shoot at ISO 8000 and 16000, where before I was sort of self-limited to 6400 (even though the cameras could be set higher). Further, the newer models' high ISO images require less extensive post-processing work. To use my 7D's at ISO 6400 I always planned to do some rather extensive noise reduction in post. Now with 7DII it takes almost not post processing NR at 8000 (default settings are adequate for a lot of uses) and less time and effort with 16000.
I am no expert on video so will leave it to others for more detailed explanations of that. I'm a little surprised that the 5D4 doesn't accommodate CFast memory cards with their faster speeds and larger capacities, both of which I would think desirable, especially if shooting 4K video.
The Dual Pixel Focus in Live View, as well as the touch screen that will be offered on the 5D4, both also are new features that should be very nice for videographers. The video capabilities of the 5D-series are near legendary (Hollywood has made extensive use of 5DII, onward). I'm mostly a stills photographer, don't use my DSLRs for video... but am sure that Canon will put a lot of effort into furthering their reputation in this regard, with the new model.
However, both Dual Pixel and the touch screen have appeal to still photographers like me, too. Dual Pixel on my 7DII's makes the difference between Live View being sort of a "novelty" with rather narrow usefulness versus now being a more widely useful feature. I understand they are doing some new things with Dual Pixel that might allow for sort of Micro Focus Adjust/Bokeh Shift in images in post-processing I need to learn more about that!
I haven't checked, but I bet 5D4 also has Canon's "Flicker Free" feature, which I've found really nice in 7DII (also in 80D, I believe). It makes for far more "keepers" when you have no choice but to shoot under fluorescent or sodium vapor lighting! "Flicker Free" simply times the shutter release with the lighting's peak output, effectively and for the large part solving both exposure and color balance issues with those types of lighting. The timing changes are imperceptible... there's no noticeable delay in shutter release. Just makes for more consistent exposures and color.
Doesn't hurt, either, that the new camera now has built in WiFi and GPS (both of which some folks want for various reasons). Or that the introductory price is the same as the model that preceded it when it was intro'd in 2012.
There's more... But overall sounds like nice, solid and useful "incremental" improvements to an already good, solid product... rather than earth-shaking "game changers".
We'll see. Should be very interesting to start seeing images made with 5D4 and hearing some "real world" user feedback.