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Canon EOS-1Ds Mark III (Body Only) review: Canon EOS-1Ds Mark III (Body Only)

Canon EOS-1Ds Mark III (Body Only)

Phil Ryan
15 min read


Canon EOS-1Ds Mark III (Body Only)

The Good

Very low noise, high quality images; 21.1 megapixels; live view shooting; pro-level build-quality and performance.

The Bad

High price tag; heavy body; no AF in live view mode.

The Bottom Line

The 1Ds Mark III marks another high-end success for Canon, though you'll need a lot of spare cash if you want to own this ground-breaking camera.

Canon's 1Ds series of cameras exists in a class of its own. With pixel counts well above anything else offered in a 35mm-format digital SLR, an attention to detail that addresses the needs of high-end professionals, and a price tag that's thousands of dollars more than the nearest competition, it continues to push the limits of digital photography. The 1Ds Mark III, the latest in the series, brings the megapixel count to a whopping 21.1 and is every bit a precision instrument. It offers a high level of control over all aspects of your images, a body design that gives you fast access to these controls, and can be customized to tailor certain buttons and functions to your shooting style. It's been over three years since its predecessor was announced, so there are a fair number of new features in the Mark III, which bring it up to date with the latest trends in dSLRs. With this latest model, Canon has stepped up to a pixel count that, up till now, was solely the realm of medium format digital backs, while maintaining an edge in terms of physical size and sharpness of available lenses.

Canon's 1Ds series body design, with its long, relatively straight grip, seems somewhat blocky compared with the sculpted designs that Nikon and some other manufacturers use. However, that's partly because the grip itself is longer, with about 3.25 inches of main grip space compared with the Nikon D3, which has about 2.5 inches of main grip space. That means that the Canon might better accommodate people with larger hands.

Both cameras have longer vertical grips. Speaking of which, as in previous models, Canon duplicates the buttons and dials around the shutter button on the vertical grip, though they omit the exposure compensation and ISO buttons. Since you can use the large control wheel on the camera back for exposure compensation, only the lack of the ISO button is annoying, especially if you've come to rely on it as much as I have recently. To Canon's credit, in my field tests I found that the vertical grip's shutter on the 1Ds Mark III was less prone to accidental pressing than the one on the Nikon D3. Both offer an on/off switch to prevent such accidents when using the main grip.

With its upgrade to a 3-inch LCD screen, from the 1Ds Mark II's 2-inch screen, Canon was forced to relocate some buttons that used to reside to the left of the LCD. Menu and Info buttons move above the screen, while the playback button drops to below it. The Select button from the Mark II N is now obsolete, thanks to the Mark III's Set button, which is mounted in the middle of the large scroll wheel, much like the scroll wheels found on the EOS 40D and 5D. Another feature drawn from those siblings is the tiny joystick controller, which is used to navigate between various menus, among other things.

While the Mark II had three two-button combinations of the buttons to the left of the pentaprism, Canon eliminated two of those combos by including the aforementioned dedicated ISO button and putting both AF and Drive under the same button. The small scroll wheel near the shutter controls one while the large back scroll wheel adjusts the other. The only remaining combo controls bracketing. The very observant among you may notice that Canon now hides the diopter wheel behind the viewfinder's eyecup, so that you now have to remove the eyecup to adjust it. That's good, since you really shouldn't need to change it that often and don't want it to change inadvertently. You might also notice that there's no clearly marked white balance button. The FUNC button handles that, but it would've been nice for Canon to mark it. They also moved the white balance shift to the menu only, so the Mark II's WB +/- button is replaced by the AF-On button, which triggers the autofocus and can come in handy if you don't like the standard half-press of the shutter button to activate focus. As you might guess, there are a number of ways you can configure the shutter and AF-On buttons to work together.

The first thing most people say when holding the 1Ds Mark III is that it's heavy, and they're right. At times though, that weight can help steady your shot and once you get used to shooting with a body that's nearly 3 pounds without a lens attached (but with the battery), the weight isn't as big of an issue, though your arm will feel more tired at the end of a long day of shooting than it would if you were using the 5D. Also, your back may feel it if you carry this camera and a few big pro lenses around for a while.

The 1Ds Mark III's viewfinder offers 100 percent coverage, according to Canon, and in my field tests, it seems like they're at least extremely close, making it joy to frame images, since you're not guessing if what you see through the lens is all of what you'll get. Compared with cameras with smaller sensors, the finder's 0.76x magnification won't look all that impressive, though it's plenty big and bright. If you don't enjoy the screen that comes with the camera, Canon also offers a choice of 15 optional focusing screens to which you can switch. I had no trouble focusing manually with the default screen.

Like the 1D Mark III, the hot shoe on the 1Ds Mark III has a raised hard plastic ridge around the hot shoe that mates with a rubber gasket around the connector on the 580 EX II Speedlight, to seal one of the few spots on the camera that isn't protected by rubber gaskets built into the body already. The shutter is said to last for up to 300,000 cycles, which is a notable increase over its predecessor and puts it even with the shutter in the Nikon D3.

The feature everyone will mention first about the 1Ds Mark III is its 21.1-megapixel Canon CMOS sensor. I wouldn't be surprised if that is followed by a small discussion of the camera's 14-bit per channel analog to digital conversion, which theoretically allows for 16,384 levels of brightness compared to 4,096 levels with the 12-bit Mark II when shooting RAW. Nikon's D3 also offers 14-bit RAW output, but also gives the option to roll that back to 12-bit if you're trying to keep file sizes down. You can't dial down to 12 bit on the Canon, so if you shoot RAW, expect files in excess of 30MB each. Full-size, finest-quality JPEGs can approach 15MB.

Since the sensor's size is the same as a frame of 35mm film (often referred to as full-frame), you don't have to worry about any conversion factors to figure out the "equivalent" field of view that you'll get with any of Canon's EF lenses. However, you won't be able to use any of the company's EF-S lenses. While this bothers some folk, especially because Nikon lets you mount its digital-only DX lenses on its full-frame D3, Canon's EF-S lenses extend further into the body, so the large mirrors on its full-frame and 1.3x focal-length-multiplier 1D series cause a physical conflict. So, Canon's not likely to change this. However, it's typically understood that anyone buying a full frame Canon would know that you can't use EF-S lenses, since the company has been very upfront about this issue from the get go. Also, I should note that the ability to use DX lenses on the D3 comes at the expense of precious pixels.

Outdoor photographers will appreciate the 1Ds Mark III's dust reduction system. It shakes the sensor whenever you turn the camera on or off to shake dust from the IR-cut filter in front of the sensor. That filter is also has an antistatic coating to prevent dust from adhering in the first place. If you end up with any persistent marks on the sensor you can have the camera map the sensor and plot their locations, so you can remove them automatically with the included Digital Photo Professional software.

Following the current trend, the 1Ds Mark III includes a Live View shooting mode, which lets you frame images with the big 3-inch LCD on the back of the camera instead of the optical viewfinder, should you choose to do so. Once the Live View mode is enabled in the setup menu, all you have to do is press the Set button to enter Live View mode. When you do, the camera locks the mirror up, thereby cutting off the optical viewfinder, and you are restricted to manual focus. If you're worried about light leaking in through the viewfinder, you can block it with the built-in eyepiece shutter by flipping down the switch in the right side of the viewfinder. Conveniently, you can use the playback zoom controls to zoom in either 5x or 10x on your subject, to aid in manual focusing. Canon doesn't set any strict limits on how long you can remain in Live View mode, but it does mention that the sensor heats up in Live View mode and that you may encounter a thermometer icon on the LCD once the camera reaches a certain temperature. I never saw this icon when I used Live View mode, but if you typically shoot in very warm environments (studio hot lights, anyone?) you may run into it. As you may guess, shooting at higher ISOs should make the sensor heat up faster than at lower ISOs. Canon also warns that increased temperatures can lead to increased image noise.

Canon has increased the number of cross-type autofocus points from 7 in the Mark II to 19 in the Mark III. Cross-type AF points typically provide a higher level of sensitivity compared to standard horizontal-only points. Those 19 cross sensors are joined by 26 "assist points" for a total of 45 AF points. Careful scrutiny of Canon's manual shows that the number of active cross-type points decreases drastically if you use a lens with a maximum aperture slower than f/2.8. When you step down to a lens with a maximum aperture of f/4, only the center point functions as a cross-type; the rest function as horizontal only. With a maximum aperture of f/5.6, all AF points become horizontal only and by the time you reach a maximum aperture of f/8 you're left with only the center point active and it acts as a horizontal-only sensor. This is essentially the same system that is employed in Canon's 1D Mark III, which still has an ongoing problem with continuous AF under certain conditions, including very hot and bright shooting conditions, according to Rob Galbraith. I saw no such problems in my field tests with the 1Ds Mark III, though I did most of my testing in winter in New York City. Still, there's no real reason to think that the 1Ds Mark III has any such problem in the first place.

To determine a proper exposure, the camera uses a 63-zone TTL (through the lens) metering system. The system offers full-frame evaluative metering, center-weighted average, and partial and spot metering. According to Canon, the partial option uses the center 8.5 percent of the frame to determine exposure, while the spot setting uses 2.4 percent and can be set to the center or linked to the AF sensor in use, or you can choose up to eight spot readings and let the camera average them. Canon calls this last option "multispot metering." All you have to do is press the FEL button to add another spot reading while you're in spot AF mode to begin with. The average of the total number of spots is used, and you can even apply exposure compensation. While it worked well, it took me a little time to figure out that you have to point the active spot at each part of the scene for which you want to add a reading and then recompose before capturing your image. Sure, that makes sense, but the manual probably could've communicated that a little more clearly.

In our field tests, the 1Ds Mark III yielded remarkably accurate exposures and was rarely fooled by tricky scenes, but the 3D color Matrix Metering found in Nikon's D3--with its 1,005-pixel sensor and onboard database of comparison image data--barely edges out the 1Ds Mark III's evaluative mode when it comes to very tricky situations. Ultimately, though, this may be a matter of preference on my part, since the Nikon tends to err on the side of caution in preserving highlight detail by slightly underexposing in some situations, while the Canon will serve up what is traditionally a proper exposure. Really, you can't call either approach "wrong." If you're really worried about highlights, though, you can activate the Mark III's Highlight Tone Priority custom function, which makes use of the camera's 14-bit digital conversion to extend the upper portion of the dynamic range to help preserve highlight detail. There's an example of this in the slide show that accompanies this review.

Another feature the 1Ds Mark III shares with its 1D cousin is the Picture Style menu in which you can quickly adjust sharpness, contrast, saturation, and color tone to change the overall look of the images you capture. In addition to six presets, which can each be modified as you see fit, there are three user-defined settings so you can make up your own. Among the presets is a monochrome setting, which includes filter effects that mimic traditional (yellow, orange, red, and green) black-and-white filter sets. In addition to the filters, there are also toning effects, such as sepia, blue, purple, or green. The black-and-white filter effects are subtle, but do a decent job of approximating the effect of real filters. Best of all, you can access the Picture Style menu from a dedicated button next to the FUNC button, so if you want to create different styles for different situations, it's easy to switch between them quickly.

As has become the norm on high end dSLRs, the 1Ds Mark III includes a slew of custom functions, so you can tweak the camera to your heart's delight. That means you really should sit down and read the manual--at very least the section that details the custom functions. If you don't you'll be missing out on a lot of the things this camera can do. For example, you can extend the sensitivity range from its default of ISO 100-1,600 one stop in either direction, to cover ISO 50-3,200, though the camera displays L and H respectively for these extremes. You can also limit sensitivity to a tighter range, or do the same for shutter speeds or apertures. Some of the buttons, such as the aforementioned AF-On button, can be changed to perform slightly- or very-different functions. With the AF Microadjustment function, you can fine tune the AF so that it focuses slightly ahead or behind the point that it normally would focus to. This can be set to apply only to certain lenses, or all lenses. Nikon offers a similar adjustment in the D3. Canon also lets you save up to three sets of custom functions, so if you share the camera, or want certain settings for certain types of jobs, you can save them and switch among them quickly and easily.

As usual, the 1Ds Mark III is made to work with a very wide variety of Canon's optional accessories. This includes an array of Speedlites; one of the most comprehensive assortments of lenses available today; the WFT-E2A wireless file transmitter, which lets you send files to a computer via the 802.11g wireless standard; and the OSK-E3 Original Data Security Kit, which lets you verify that images have not been tampered with. Of course, there are many more accessories, but listing them all here would be excessive.

Performance is a strange area for the 1Ds Mark III. Although it has two Digic III processors to crunch all the bits that constitute 21.1MP of image data, the sheer number of pixels means that it can't keep up with Canon's own 1D Mark III, or Nikon's D3, when it comes to continuous shooting. That said, it does excel at all other areas of performance.

Part of the joy of shooting with a camera of this caliber is its consistency of operation. The 1Ds Mark III delivers very consistent results. Its automatic white balance is a great example. Not only does it do a phenomenal job of neutralizing colors under tough conditions, but it also serves up predictable results when returning to similar conditions. I have been shooting a lot in the New York City subway system, which has some nasty (from a color standpoint) fluorescent lighting. The 1Ds Mark III handled it with aplomb and yielded almost identical results when returning to the same shooting situation on different days. Its numeric color temperature mode, along with its white balance shift, helped me get just the results I wanted from a nighttime outdoor shot lit largely by bizarre-colored streetlamps. The result, which can be seen in the accompanying slide show, might not be absolutely true to life, but it's extremely close and is precisely what I wanted and the camera's LCD gave a very good representation of the final color on my calibrated monitor.

In our lab's speed tests, which were conducted using Canon's EF 50mm f/1.2L USM lens, the 1Ds Mark III fared very similarly to the 1D Mark III, though this 21.1MP beast took slightly longer to rouse from its rest. The 1Ds Mark III took 0.3 second to start up and capture its first JPEG, compared to 0.1 sec for the 1D Mark III. After that, the 1Ds Mark III took 0.4 second between JPEG or RAW shots. Shutter lag measured an impressive 0.4 second in our high contrast test and 0.9 second in our low contrast test, which mimic bright and dim shooting conditions, respectively.

Continuous shooting yielded an average of 5 frames per second, just as Canon claims. The camera can capture up to 12 consecutive RAW images or 56 full-resolution JPEGs with JPEG quality set to 8 instead of its top setting of 10. A little counter in the viewfinder shows you how many more images can be stored in the buffer while you're in continuous shooting mode. The 1D Mark III is the real speed freak of the Canon tribe, turning in 9.9fps in our tests, though it has just less than half the number of pixels that this camera has.

The 1Ds Mark III uses the same battery as the 1D Mark III, which is a change from the batteries used by previous 1D models. This will be a hassle for pros and businesses, who usually have extra batteries and chargers. Canon rates the battery life at about 1800 shots and I would believe them. Suffice to say, you'll get a lot of shooting time from each battery charge.

Image quality
The 1Ds Mark III can capture beautiful, amazingly detailed images. Colors are extremely accurate and, as mentioned above, the automatic white balance system does a great job of keeping color neutral across a wide range of lighting. As usual for a higher end camera, the auto white balance keeps a slight warmth to incandescent-lit shots, though the tungsten preset can eliminate that if you prefer, or you can set a manual white balance if you have the inclination.

One of the nicest things about the 1Ds Mark III is its low noise. You can make pleasing prints across the entire sensitivity range of this SLR, which is a liberating feeling when you're out shooting. Too often I find myself setting limits on sensitivity when shooting with some SLRs. This isn't to say that there is no noise present in the 1Ds Mark III's images. Mostly, it remains a very fine multicolored grain, and that doesn't even manifest itself in a noticeable way until ISO 800. Even then, the 1Ds Mark III maintains very vibrant colors, ample shadow detail, and plenty of fine detail. If you want extremely clean images you should probably stick to ISO 400 and below, but I was happy to shoot with not-very-reckless abandon even with the sensitivity range widened.

The Canon 1Ds Mark III isn't for everyone. You really have to have a need for a lot of pixels to warrant buying one instead of the 1D Mark III, which offers very similar image quality, an extra stop of sensitivity, and double the burst speed for thousands fewer dollars. For my style of shooting, I'd opt for the 1D Mark III and spend the savings on some primo lenses. That shouldn't diminish the 1Ds Mark III in any way though. It is a unique imaging powerhouse and that can't be denied. If money were no object, I'd want one. The bigger question is whether current 1Ds Mark II owners should step up. That's a tough question. There, the difference in megapixels is more negligible. The real difference comes down to whether those extra pixels really mean something to you and whether you value the 1Ds Mark III's improvement in noise over its predecessor, which can't be discounted. Ultimately, you have to ask if you've been disappointed in, or felt limited by, the 1Ds Mark II's performance and image quality. Of course, the 1Ds Mark III's larger screen, live view shooting, and beefed up AF and exposure systems also give a reason to step up, though these aren't as big a motivation. Overall, I'd go for the upgrade, especially if it can be considered a business expense.

Shooting speed (in seconds)
(Smaller bars indicate better performance)
Time to first shot  
Raw shot-to-shot time  
Shutter lag (dim light)  
Shutter lag (typical)  
Olympus E-3
Canon EOS 1Ds Mark III
Nikon D2Xs
Canon EOS 1D Mark III
Nikon D300
Sony Alpha DSLR-A700

Typical continuous-shooting speed (frames per second)
(Longer bars indicate better performance)
Canon 1Ds Mark III


Canon EOS-1Ds Mark III (Body Only)

Score Breakdown

Design 9Features 9Performance 9Image quality 9