This page shows a direct comparison between 5D and 5D mkII noise levels, at
the bottom half of the page: <
http://www.dpreview.com/reviews/canoneos5dmarkii/page21.asp>
If I read the graphs correct, the 5D mkII is never two stops better then
the 5D, I'd say mostly under 1 stop, in the 3200 region slightly over 1
stop. Actually, I'm quite surprised that in the iso range both cameras
share, the differences are not too big. The 5D mkII has a bigger range of
ISO values though.
Best, Frank.
2012/1/7 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
> I don't really know when the newer cameras start looking good (which, of
> course, is very subjective). Although I called the 5D's ISO 3200 noisy
> it's probably much better than the Minolta A1's ISO 400 or maybe even
> 200. As to quality I just take my cues from the way that Canon ISO
> selection works.
>
> The 5D has a normal ISO range of 100-1600 selectable within 1/3 stop
> increments. It will also do 50 or 3200 but they are not labeled as
> such. They are labeled "L" and "H". To be able to use them at all they
> must be deliberately enabled by a custom function setting and there are
> no 1/3 stop increments between 50 and 100 or 1600 and 3200. This
> deliberate custom function setting requirement says to me something
> like: "We really don't want you to go there but, if you insist, we'll
> allow it and you agree to accept the risk."
>
> I've never seen high ISO images from a 5D Mk II but the Mk II increased
> the definition of "normal" ISO range by 2 stops from 100-1600 to
> 100-6400. It also has an expanded range that must be selected via
> custom function. It has an L = 50 setting but adds 2 high settings, H1
> = 12,800 and H2 = 25,600. I have assumed that the 5D Mk II's 6400 is as
> good as the 5D's 1600 but do not know that for sure. A 2 stop
> improvement was not enough to make me jump but a 3 stop improvement
> (that I believed) probably would. For the few times I've been forced to
> use 3200 it's usually OK but subject motion can be a problem. I've
> concluded that a 3 stop improvement would allow a fast enough shutter
> speed to avoid the motion blur. It would also help compensate for my
> lack of IS lenses.
>
> There is another clue to noise levels in the Canon full auto modes. The
> 5D's full auto mode automatically selects ISO but limits the range to
> 100-400. The 5D Mk II's auto ISO range has been increased to 100-3200.
> Since only JPEGs are allowed in full auto mode I'm not sure that's an
> improved sensor development or just better noise reduction firmware.
>
> The Nikon D3 matches the 5D Mk II's ISO ranges except that it starts at
> ISO 200 rather than 100 and allows 1/3 stop increments over higher
> ranges. The Nikon's low range only goes down to ISO 100 rather than 50.
> That's a drawback for a flash user trying to do fill flash in bright sun.
>
> The D4 offers normal ISO range of 100-12,800 which is extendable from 50
> – 204,800. The 50 offering helps solve the fill flash problem for Nikon
> users. If the 5D Mk III also offers 12,800 in its normal range that may
> be exactly the 3 stop improvement I'm looking for.
>
> Chuck Norcutt
>
>
>
> On 1/7/2012 1:10 AM, Chris Barker wrote:
> > That's interesting, Chuck. I had thought that the 5D was the stage
> > at which high-ISO shots were much easier to use. At what camera
> > stage does Canon (or Nikon) start looking good with 3,200 or 6,400?
> >
> > Chris
> >
> > On 7 Jan 2012, at 03:06, Chuck Norcutt wrote:
> >
> >> The 5D Mk II didn't offer enough to get me to change. Maybe the Mk
> >> III will but who knows when that's coming or what it will be. What
> >> will tempt me will be truly high ISO. I'd probably jump at
> >> something that gave me ISO 12,800 with quality equal to the 5D's
> >> ISO 1600 (3 stops more). The 5D does go to 3200 but gets pretty
> >> noisy at that level.
> >
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