I never shoot video with my mk2. I only take portraits, no issue with slower shutter speeds etc. Pragmatically, what would be the main disadvantages of downgrading, in terms of output and image quality?

  • 1
    \$\begingroup\$ A better question might be what do you gain. Unless you have someone willing to trade you one for the other and pay cash for the difference, I'd expect that you wouldn't recover much. Also bear in mind shutter longevity for cameras that old. If the shutter hasn't been replaced and it had moderate use, there's a good chance it is close to needing a new shutter which isn't particularly cheap (a few hundred dollars). \$\endgroup\$
    – AJ Henderson
    Nov 5, 2013 at 19:21

2 Answers 2


If you shoot under 400iso and don't print large, you won't notice much difference in the image quality. If you shoot higher ISOs, the Mk II has less noise.

Practically speaking, the screen on the MK I is the most annoying thing if you're used to the MK II. Colour accuracy and sharpness during playback are poor compared to the MKII and newer cameras- and far less useful for evaluating focus.


The main benefits of the 5D MkII over the 5D MkI include:

  • Addition of ISO 3200 and 6400 native ISOs
  • 21MP over 13MP
  • Addition of dust reduction features
  • New menus and interface
  • Vignetting correction built in
  • AF Micro Adjustment
  • 98% viewfinder instead of 96%
  • Higher resolution larger LCD screen
  • Live view for composition
  • Twice the battery capacity/frames per battery
  • Silent modes

Sure most of the above isn't obviously impacting image quality(beyond the high ISO features), but it sure will make it more comfortable and easy to get those shots.

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    \$\begingroup\$ Oh wow, I didn't realize that neither of the previous 5Ds had 100% coverage view finders. \$\endgroup\$
    – AJ Henderson
    Nov 6, 2013 at 15:40
  • \$\begingroup\$ @AJHenderson - I know, people today love to talk down about the 6D for example because it doesn't have a 100% viewfinder, without realizing how revolutionary the 5D mkI was considered and how much people loved it(with a 96% coverage finder). The MkI was a great camera at introduction, but technology has really trumped it in many ways over 8 years. \$\endgroup\$
    – dpollitt
    Nov 6, 2013 at 17:16
  • \$\begingroup\$ oh yeah, not saying it's a bad camera. I'm just surprised and didn't realize 100% VF was new on the 5D mark iii. \$\endgroup\$
    – AJ Henderson
    Nov 6, 2013 at 19:00

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