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Canon EOS Rebel T3i/600D Dynamic Range (JPEG)

Our Dynamic Range measurement system involves shooting a calibrated Stouffer Step Wedge (13 stops total range) which is backlit using a daylight balanced lamp (98 CRI). A single shot of this produces a gray scale wedge from the camera's clipped white point down to black (example below). Each step of the scale is equivalent to 1/3 EV (a third of a stop), we select one step as 'middle gray' (defined as 50% luminance) and measure outwards to define the dynamic range. Hence there are 'two sides' to our results, the amount of shadow range (below middle gray) and the amount of highlight range (above middle gray).

To most people highlight range is the first thing they think about when talking about dynamic range, that is the amount of highlight detail above middle gray the camera can capture before it clips to white. Shadow range is more complicated; in our test the line on the graph stops as soon as the luminance value drops below our defined 'black point' (about 2% luminance) or the signal-to-noise ratio drops below a predefined value (where shadow detail would be swamped by noise), whichever comes first.

Note: this page features our new interactive dynamic range comparison widget. You can compare the dynamic range of images captured using the camera's various parameters, or you can select up to three other cameras to compare. The wedges below the graph are created by our measurement system from the values read from the step wedge, the red lines indicate approximate shadow and highlight range (the dotted line indicating middle gray).

The 600D uses the same the tone curve as we've seen many times before from Canon, giving good dynamic range (around 3.3EV above middle grey) and a gentle roll-off as you move towards the highlights. The Neutral and Faithful Picture Styles are a little different from the others, employing slightly lower contrast in the upper mid-tones but clipping a bit more abruptly to white (although at the same point relative to middle grey). Overall this is exactly what we're used to seeing from Canon DSLRs, meaning a little less highlight range by default than is typically obtained from Nikon and Sony competitors (but much the same as other brands).

The Highlight Tone Priority option (Custom Function II.6) is a method for capturing more information in the brightest parts of the scene. It does this by applying less amplification to the signal coming from the sensor, then compensating for it by using a different tone curve to ensure the correct brightness in the final image. Turn this on and the 600D captures an extra stop in the highlights, resulting in an overall range that at least matches that of Sony and Nikon models.

When used at ISO 200, the effect is the same as underexposing an ISO 100 shot by one stop, then pulling up the mid tones and shadows to compensate. The result is an image that looks right but doesn't lose the extra highlights you've captured. It means you have to use ISO 200 and upwards, because you're using the sensor at its lowest amplification setting but with one stop less exposure than in normal mode. The penalty is a touch more noise in shadow regions (as shown by the bottom limit of the HTP ON strip being slightly higher), but in return you get around one stop more highlight detail, which can be invaluable on bright, sunny days.

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Comments

Total comments: 8
BradMark

Pretty good review, thanks.

0 upvotes
KonradDC

I have had this camera for over 2 years. The video works very well for exposure, especially in difficult lighting areas. The problem is the focus is slow and hunts. It is best to use it in manual mode and with fairly fast lenses. This was an upgrade to EOS 350, but I only use 2 of the lenses I used before with the 600D - Canon EF 50mm 1.8 and Sigma 70-300 mm. Photos are good and the lens profile works well with the Canon lenses I have. Profile does not work with non-Canon lense like my sigma 17-70 2.8-4 and the 70-300mm. I have also bought a Canon 10-18mm wide angle lens to add to the 18-55 is and 55-250 is lens, plus the lenses mentioned earlier.
I had to buy Nissin flashes as the Sigma 500 flash is not compatible, even after being sent to Sigma for a fix.
The worst issue is the slow focus in live view. Fast lenses are better, but it is best to go manual or use the view finder. I was think of getting the 700D, but not sure if it is worth it, even with the upgrades.

0 upvotes
reanim888

Great camera for shooting still photos. The quality is superb and low-lighting is a breeze (as soon as you get used to working the correct settings).
The main reason I chose the T3i was for the 1080p video is offers. The video quality is great, but there are a few things to be aware of.
You'll want to get a memory card rated at a 10 for speed, and make sure it's a good-quality brand. If you scrimp on the card you'll forever be hitting yourself when the video recording repeatedly stops for no apparent reason. I have been through three cards that don't cut it (three different brands). Make sure you shell out the money for a quality card or you won't be able to record the data fast enough for 1080p (particularly in bright lighting or when you have a light source in the background--like a TV or lamp).
Enjoy!

1 upvote
qosmioamit

This is my first DSLR as well and I think it functions very well. I use the kit lens and additionally I bought a telephoto zoom lens 55 to 250mm (f4 to f5.6) and a prime 50mm (f1.8). The camera gives me reasonably sharp shots. It does not have as many focus points as a competitive Nikon D3200. I post process with Aperture and then the pictures look even better!

1 upvote
LuFra72

This is my first DSLR, coming from two previous Canon PowerShot cameras and a Minolta 35mm SLR. For my purposes (not professional) this camera has been outstanding. I mainly wanted a camera that allowed me to take better family and vacation photos and one that would allow me to learn about shooting manually. I also feel confident that lens purchases I make for this camera will be supported on better Canon cameras should I see the need for it in the future.

0 upvotes
Empies

Even for an amateur camera very well. Of course, for a good job requires additional configuration. Plus, the lens plays an important role. That the work of the unit, I want to note the high processing shots. Good sharpness and color rendition. In general, a good camera. And not expensive!

0 upvotes
keekimaru

Canon t3i 600D

This new piece of kit is very similar but quite a few dollars cheaper. The specs are similarly very close, with one exceptional difference: the new baby is 240 grams lighter in weight, made from stainless steel and polycarbonate resin with glass fibre. Which says a lot: pros like cameras with a dab of weight while the amateur fraternity goes kinky for models that don’t lower the shoulders.

Read More http://webcamerawebcamera.com/detail.php?id_detail=33

0 upvotes
VizuaLegend

So All In All., Im Looking Between This &The Rebel SL1 For Video... I Would Like To Kno Which Would Be Best For The Task &Video Editing ...

0 upvotes
Total comments: 8