Canon 5DIV

[HDNitehawk]

IMO it has to have improved high ISO noise over the 5D III to even open a discussion of buying one. Otherwise I see no worthy benefit over the 5Ds R for my purposes. The frame rate isn't fast enough to make it interesting either.

The 5Ds R had a new mirror vibration control system, I am sure this is part of the improvement with the AF system. I can tell you the AF system of the 5Ds R has been on par with my 1D IV and is very accurate. But whether those improvements translate from the slow fps 5Ds R to the 5D IV remain to be seen.

As for focus speed the 5Ds R is not as fast as the 1D series, I doubt the 5D IV will be any faster. I think that is a power and battery issue.

[Kayaker72]

IMO it has to have improved high ISO noise over the 5D III to even open a discussion of buying one. Otherwise I see no worthy benefit over the 5Ds R for my purposes.

While improvements in high ISO would be great, I am just not seeing it from the 80D vs 70D and the 1DXII vs the 1DX. Just working off DXO, but the crop sensor DR is essentially identical above ISO 800 and the FF sensor DR is essentially identical above ISO 3200. Below those values, there seems to be benefit of canon's new sensor technology. Likely the "blacker blacks" by decreasing the noise floor due to on chip A/D converters.

As for focus speed the 5Ds R is not as fast as the 1D series, I doubt the 5D IV will be any faster. I think that is a power and battery issue.

That has always been my assumption. But, for example Peety has said the 5DsR AF is far superior to the 5DIII. All I am saying is that I am reading and paying attention. If the 5DIV is generating similar buzz, that would be a big selling point to me. It may not be 1D level, but that is the type of improvement that I would absolutely gain something from.

In terms of performance, the 5DsR seems very similar to the 5DIII (again, just looking over the "measurements" in DXOMark). A bit better low ISO DR. My take has always been the 5DsR is about resolution. I could see making this upgrade some day. If I did, I'd likely keep the 5DIII for when I am going to be taking a ton of pics, and use the 5DsR a bit more sparingly when the resolution justifies the file size, etc.

Not perfect logic, but it is also hard to justify any move off a camera I am happy with.

[peety3]

That has always been my assumption. But, for example Peety has said the 5DsR AF is far superior to the 5DIII. All I am saying is that I am reading and paying attention. If the 5DIV is generating similar buzz, that would be a big selling point to me. It may not be 1D level, but that is the type of improvement that I would absolutely gain something from.

I "blame" that on CPU support. 5D3 is single Digic. 5DsR is dual Digic. 1Dx is two Digics solely for image processing, and a third (older model) Digic for exposure and AF. All three (AFAIK) share the exact same AF sensor.