Canon EOs R High ISO Test

In terms of image quality (known as IQ), the Canon EOS R has two advantages when it come to doing a high ISO test. I get it. You're interested in knowing how much noise shows up and how sharp the photos are from a Canon EOS R when higher ISO settings are used. Read on.

Realize that there are two initial factors that are in our favor: First, the EOS R has a full frame sensor and secondly, that sensor is not overloaded with too many pixels. Larger full frame cameras have a big advantage over crop-sized and smaller sensor cameras. Size matters. The larger surface of the sensor means you have more area for the camera makers to fit larger pixels on the sensor.

Small sensor camera makers have to reduce the size of the individual pixels to fit enough of them on the sensor for a quality photo. Those smaller pixels aren't as efficient at collecting light and high ISO settings often result in noisy photos.

The larger pixels of the EOS R are better at collecting light and therefore the EOS R is good in low light situations where you need to use a higher ISO settings to get a good exposure. See the test results below.


Canon EOS R High ISO ComparisonHigh ISO noise test comparison for the Canon EOS R at different ISO settings

I did the initial high ISO test test with the EOS R mounted to a tripod with an LED panel light illuminating one of the typical subjects that I photograph, in this case a mannequin who would not move at all during the different ISO setting test shots. I shot all the test photos at a constant aperture to maintain the same lens sharpness.

The 4 images above were all cropped at a pixel-peeping 100% to make the comparison valid. Even as high as ISO 6400, the EOS R produced excellent sharpness with minimal noise.


How did the EOS R perform at high ISO

The EOS R showed virtually no noise at ISO 400. At ISO 1600 the camera still gives a very clean image. At ISO 6400 noise is more noticeable, but the image still has solid quality and excellent sharpness. I maxed out the high test at ISO 32,000, and not surprisingly, noise was significant but the image was still quite useable.

High ISO Color Chart Test

Generally, I prefer to test cameras and lenses in situations that are similar to those that I normally shoot rather than static test targets. With the EOS R, I decided to give it the geeky color chart test where there are solid color-filled areas that tend to reveal noise to a much higher extent than the average scenes you photograph.

As you can see from the test result photos below, sharpness declines and noise increases to somewhat unacceptable levels at ISO 32,000.

High ISO color chart test comparisonColor chart comparison at different high ISO settings

PART II - Q and A on The Canon EOS R and ISO

Along with the simple high ISO test we did with the EOS R, there are related several inquires that come to mind. Here are the most common questions and answers with respect to ISO settings on the Canon EOS R mirrorless camera.


What is the best ISO for Canon EOS R

You're also likely curious as to what's the best ISO to set your Canon EOS R to. All other factors being equal. the highest image quality for Canon cameras is ISO 160, but that won't work in all situations. The best ISO in terms of convenience and high quality combined is ISO 1600. You'll maintain excellent image quality and have the big advantage of being able to handle less than ideal lighting conditions.  

What is the native ISO for Canon EOS R

"NATIVE ISO" refers to the normal range of potential ISO settings that are available to you on your EOS R. EXPANDED ISO refers to an expanded range of ISO settings (at both ends) where the sensitivity range is boosted and it's diminished with software that's in your camera. The EOS R has a native ISO range of 100 to 40,000. The BASE ISO of this camera is ISO 100, the lowest setting you can use without setting your R to an expanded ISO. The expanded ISO range is 50 to 102,400.

Interestingly enough, my first Canon DSLR, the Canon 10D had a native ISO range of only 100-1600. At an ISO setting of 1600 the image noise and loss of detail was quite noticeable and objectionable. The EOS R is significantly ahead of that in terms of high ISO performance, thanks to the remarkable technological advances in digital photography, specifically the design of the sensor and the software that processes the raw data into an image.

How do I expand ISO on Canon EOS R?

The ISO settings on the Canon EOS R can be found under the red camera icon, the third option, in the main menu. Watch this short video to see how easy it is to change to expanded ISO or any of the other ISO settings.



Once you activate the menu screen, you click on the first option to the left, the camera icon. Then select the 3rd column, followed by touching the "ISO Speed Settings" bar.

EOS R ISO Settings3rd column in the first menu
1

EOS R ISO Speeds Settings3 ISO options
2

Menu option to expand EOS R ISO speedHow to expand ISO range
3

Once you select "ISO speed settings" you have the options (photo 2) of setting the ISO, setting the ISO range (expand it), and the range of Auto ISO settings you want as options. 


When To Use High ISO On The EOS R

Raise your ISO setting when you're in dimly lit situations and you're getting blurry photos due to unusually slow shutter speeds. As you gain experience you'll get to know just how high of an ISO you have to use before you get the results you want. 

  1. Your kids soccer game on a dreary day or late in season when the days are short and it's getting dark
  2. Birthday cake candles when the lights are off.
  3. Moonlit, astrophotography, and nighttime photography.
  4. Indoor photos when you can't/don't want to use flash.
  5. Handheld macro photos when you need both a fast shutter speed and a small lens opening for good depth of field.

EOS R High ISO Test Summary

Generally, you want to keep your ISO settings as low as possible to get the sharpest photos with the least amount of digital noise. With a good camera that has a large sensor like the Canon EOS R-and it's so affordable for a full frame-you can get get great photos at high ISO settings up to ISO 6400.

You can also shoot in some really dark situations at super ISO settings and still get useable photographs, admittedly with some compromise in image quality.


As an Amazon affiliate Canon Camera Geek receives a small commission from qualifying purchases, at NO added cost to you.



Author Bruce Lovelace
Bruce Lovelace Signature

Bruce Lovelace is the publisher of Canon Camera Geek. Read more about him on the About Page. He also publishes how to articles and camera gear reviews at the Photography Tips website.

View some of Bruce's photos on Instagram  and Flickr  Join the Tribe: YouTube. Visit the Canon Geek FaceBook Group. Bruce also runs photo workshops and provides 1 on 1 digital photography coaching.

You might like these


Article header for Canon EOS R high ISO test

Recent Articles

  1. What Is The Canon 17mm Tilt Shift Lens Used For. Pluses and Minuses.

    Jun 26, 22 04:17 PM

    Also called a Perspective Control lens, what is the canon 17mm tilt shift lens used for

    Read More

  2. Best Canon Prime Lens For Your Money-List of Top Prime Lenses by Canon

    Jun 25, 22 03:25 PM

    There's a large selection and price range of solid choices for you. Which Canon prime lens is worth it? Helpful list and guide

    Read More

  3. How Do Canon Extension Tubes Work. Are They Any Good And Alternatives

    Jun 25, 22 12:48 PM

    Are they any good and how do Canon extnesion tubes work? Should you get the tubes made by a 3rd party or go with the extension tubes made by Canon

    Read More

  4. 10 Best Canon Wide Angle Lens Choices. Guide to Find Best One For You

    Jun 22, 22 03:09 PM

    Need help choosing a wide angle for your Canon DSLR. Here are the 10 Best Canon wide angle lens choices.

    Read More

  5. T8i Vertical video - how do I turn it off the auto rotate?

    Jun 21, 22 07:10 AM

    Hello, Thank you for reviewing this question. I am trying to just shoot with my t8i vertically and then play it back on a TV that is vertically oriented.

    Read More

  6. Your Best Canon 70D Kit Lens Choice. Startling Answer.

    Jun 17, 22 07:28 AM

    You have 3 choices for a starter lens for your EOS 70D. What's the best direction to go for a canon 70d kit lens.

    Read More

This page may contain affiliate links that pay me a small commission. There is no cost to you. Review the affiliate statement at the very bottom of this page if you want more information.


Sign up for a monthly update

Enter Your E-mail Address
Enter Your First Name
Then

Don't worry — your e-mail address is totally secure.
I promise to use it only to send you Canon Geek Newsletter.