Why is M-Raw so slow in 1D X, 5DIII and 6D compared to older cameras?

Question

In 7D
Raw: 15 in one burst.
M-Raw: 24 in one burst.
 In 60D
Raw: 16 in one burst.
M-Raw: 19 in one burst.
In 1DX
Raw: 35 in one burst.
M-Raw: 26 in one burst.
6D
Raw: 14 in one burst.
M-Raw: 8 in one burst.
5DIII
Raw: 13 in one burst.
M-Raw: 10 in one burst.
What has Canon done to the M-Raw?
My Swedish blog
X100, 7D, 6D, 17-40/4L, 70-200/2,8L IS II, 17-55/2.8 IS, 24-105/4L, 85/1,8, 50/1,4, 24/1,4L II, Helios 58/2
Darktable, RawTherapee, Photomatix, Luminance HDR, GIMP 2.9.1.

Answer 1

Hi Peter,
There are a couple things to keep in mind here.  The hardware in each camera is different from one model to the next.  Processing power and available buffer memory have an impact on the maximum burst.  The newer models, like the EOS 5D Mark III, EOS 6D and EOS-1D X, also produce higher resolution images that have a larger file size than the earlier models.  The file size of an M-RAW image taken with one camera is not always identical to the file size of an M-RAW image taken with another camera.
If this is a time sensitive-matter, additional support options are available at Contact Us.
Did this answer your question? Please click the Accept as Solution button so that others may find the answer as well.