Canon R100 Blurry Photos: Causes and Settings That Fix Them

Most blurry photos from a Canon EOS R100 come from three things: the shutter stayed open too long, the camera focused on the wrong spot, or the light was too dim for the lens. Each one leaves a different kind of blur, and each one has a setting that fixes it.

The camera itself can make sharp pictures. It uses a 24.1-megapixel APS-C sensor with a DIGIC 8 processor. Digital Camera World's reviewer wrote that whether shooting in auto, semi-auto or full manual mode, it "quite simply takes a cracking shot". So when a picture comes out soft, treat it as a clue. It is telling you which setting to change next time.

First, read the blur

Before you change anything, zoom in on the blurry photo on your screen and look closely. The kind of blur points straight to the cause. There is a longer walk-through in Why Are My Photos Blurry? How to Read the Blur and Fix It, but here is the short version.

• Only the moving thing is smeared, and the background is sharp. This is motion blur. Think of a child running past while the camera's door is still open. The fix is a faster shutter speed.
• Everything is smeared the same way. This is camera shake. Your hands moved a tiny bit during the shot. The fix is a faster shutter speed and a steadier hold.
• Something in the photo is sharp, just not your subject. This is missed focus. Maybe the fence behind your dog is crisp and the dog is soft. The fix is in the autofocus settings.
• The whole photo looks gritty and mushy in low light. This is noise, and it can look like softness. The fix is more light or a brighter lens.

The three settings behind every photo

Every picture is made from three settings working together, a bit like syllables in a line of a poem. Change one, and the others have to adjust to keep the rhythm.

• Aperture is like the pupil of your eye. A wide pupil lets in lots of light. A small one lets in less. It is written as an f-number, and a smaller number means a wider opening.
• Shutter speed is like a door opening and closing. A quick slam freezes motion. A slow swing lets movement smear.
• ISO is like turning up the volume on a quiet song. It gets louder, but some hiss creeps in.

In auto mode, the camera picks all three for you. When the light gets dim, it often slows down the door to let in more light, and that is when blur sneaks in.

Specs on the R100 that affect sharpness

Feature	Canon EOS R100
Sensor	24.1MP APS-C, DIGIC 8 processor
Autofocus	Dual Pixel CMOS AF, up to 143 distance measurement areas, Eye Detection
Subject detection	Humans: eyes, face, head, body
Burst speed	About 6.5 fps with One-Shot AF, about 3.5 fps with Servo AF
ISO range	100 to 12800, expandable to 25600
Shutter	Electronic first-curtain
Kit lens	RF-S 18-45mm F4.5-6.3 IS STM
Rear screen	3-inch, fixed, not touch sensitive
Video autofocus	Contrast AF in 4K, Dual Pixel CMOS AF in Full HD

Cause 1: The shutter speed is too slow

This is the most common cause of blur on any beginner camera, and the R100 gives it a little push. The kit lens has a maximum aperture of f/4.5 to f/6.3. In plain words, its pupil cannot open very wide. PetaPixel calls it a "very weak aperture range" and says the lens will be worse in anything other than bright sunlight. When less light comes through the lens, auto mode keeps the door open longer, and moving kids, pets or shaky hands turn into smears.

The fix: take charge of the shutter

Digital Camera World points out that the R100 reveals its real strengths when you take it into semiautomatic and manual modes. The easiest step out of auto is shutter priority. You choose how fast the door closes, and the camera works out the rest.

Here is a simple way to find the right speed without memorizing anything:

1. Pick a shutter speed and take a test shot of your subject.
2. Zoom in on the screen and look for smearing.
3. If you see blur, make the shutter speed roughly twice as fast and try again.
4. Stop when the shot is crisp. That is your speed for this scene.

Every blurry test shot here is useful. It shows you exactly where the line is, and you will remember it next time.

Hold the camera steady

The R100 uses an electronic first-curtain shutter, and PetaPixel's reviewer said it was quiet and stable, could barely feel any disturbance, and felt the camera should handle sharp pictures even at slower shutter speeds. Your hands are still part of the system, though. Tuck your elbows against your body, hold the camera to your eye using the electronic viewfinder, and press the shutter button gently instead of stabbing it.

Zooming in matters too. The R100's sensor has a 1.6x crop factor, which Digital Camera World notes magnifies the focal length of your lenses for more reach. That same magnification that brings a faraway bird closer also makes every little wobble look bigger, so use a faster shutter speed when you zoom in.

Cause 2: Focus landed in the wrong place

If part of your photo is sharp but your subject is not, the shutter was fine. The camera just focused on something else. The good news is that the R100 has a strong autofocus system to work with.

Canon says the R100 uses Dual Pixel CMOS AF across up to 143 separate distance measurement areas. Digital Camera World lists the system with 3975 points and human detection for eyes, face, head and body. Its reviewer called the autofocus "incredibly robust" and said newcomers can trust the camera to find and keep a subject in focus.

Match the focus mode to your subject

The R100 has two main photo focus modes:

• One-Shot AF is for things that hold still, like a flower or a posed portrait. Half-press the shutter, wait for focus to confirm, then press all the way.
• Servo AF is for things that move, like a toddler or a dog. The camera keeps adjusting while you half-press.

Canon says Eye Detection can detect human eyes with high accuracy from long distances, and it works on moving subjects when you use Servo AF. For people who move, Servo AF with Eye Detection is the setting to reach for.

There is one trade-off to know. The R100 shoots about 6.5 frames per second in One-Shot AF but only about 3.5 in Servo AF. The-Digital-Picture calls that Servo speed "very slow". So with moving subjects, do not count on a fast burst to save you. Follow the subject, wait for the moment, and press at the right time.

Moving the focus point without a touchscreen

The R100's rear screen is not touch sensitive, so you move around with buttons. PetaPixel noted that a touchscreen would have made moving the autofocus point easier. Until you get quick with the buttons, let face and eye detection choose the spot for you when you photograph people. Then check that the focus box sits on the eye before you take the shot.

Cause 3: There is not enough light

Dim rooms, cloudy evenings and indoor parties push every camera hard. With a narrow lens, you have only two ways to keep the shutter fast: raise the ISO, or bring in more light.

Let the ISO go higher

Digital Camera World lists the R100's ISO range as 100 to 12800, expandable to 25600. The-Digital-Picture found ISO 100 quite clean, called ISO 6400 noisy but usable, and described ISO 12800 as a last resort, with a significant share of detail lost at ISO 25600. That reviewer's own comfort limit for APS-C noise is usually ISO 3200.

In Digital Camera World's lab comparison, the R100 showed similar noise to the Nikon Z30 and Sony a6100 at lower sensitivities, while the Z30's high-ISO shots were cleaner. Digital Camera World also says that for stills, unless you shoot in very low light, you probably will not see an image quality difference between the R100 and the R50.

The lesson is simple: a slightly grainy photo that is sharp is almost always better than a smooth photo that is blurry. Grain can be cleaned up later. Blur cannot.

Use a brighter lens

A lens with a wider pupil lets the shutter stay fast in dim light. Digital Camera World mentions the Canon RF 28mm f/2.8 STM pancake lens, released at the same time as the R100, as a compact match for it. TechRadar reports that Sigma now makes RF versions of many of its DC DN Contemporary lenses for Canon's APS-C cameras. TechRadar's reviewer recommended the Sigma 56mm f/1.4 DC DN Contemporary as a second lens after the kit zoom.

When PetaPixel reviewed the R100 in 2023, it said there were almost no third-party lens options and that those available would not support autofocus. TechRadar's later report of Sigma's RF lenses shows that has changed. You can also use older Canon EF and EF-S lenses with a Canon Mount Adapter EF-EOS R, and The-Digital-Picture says adapted lenses perform as native.

Cause 4: The lens itself

Sometimes a shot looks a little soft even when focus and shutter speed were right. TechRadar says the RF-S 18-45mm kit lens does not quite match Nikon's 16-50mm kit lens, and it described the RF-S 55-210mm telephoto as decent, noting detail was a little soft in its duck photos. TechRadar's reviewer also called the 18-45mm "pretty basic".

This is not something to worry about on your first day. Fix the shutter and focus causes first, since they explain most blur. If your photos still look soft after that, a better lens is the next step.

Blurry video on the R100

Video has its own focus rules on this camera, and they surprise a lot of new owners.

• 4K uses slower focus. Digital Camera World says that in 4K you are restricted to much slower contrast AF, and you only get Dual Pixel CMOS AF in Full HD. PetaPixel also notes contrast-based autofocus in 4K.
• 4K is cropped. Digital Camera World says 4K is captured with a 1.55x crop. Canon lists 4K at 24p.
• Slow motion has fixed focus. Canon says autofocus is fixed when shooting 120p or 100p high frame rate video.

If your subject moves, record in Full HD so the faster Dual Pixel system can follow it. Digital Camera World lists Full HD at up to 60p. For slow motion, set your focus before you press record and keep the subject at the same distance.

For walking shots, Canon says the R100's built-in Movie Electronic IS helps reduce camera shake.

A sharp-photo checklist for your R100

1. Read the blur first: motion, shake, missed focus, or noise.
2. Leave auto and try shutter priority so you control how fast the door closes.
3. Use One-Shot AF for still subjects and Servo AF with Eye Detection for moving people.
4. Let the ISO climb indoors instead of letting the shutter slow down.
5. Hold the camera to your eye with your elbows tucked in.
6. Shoot video of moving subjects in Full HD.
7. When you are ready, add a brighter lens for low light.

If you are comparing cameras or have a second body in the family, the same ideas are covered for other models in Canon R50 Blurry Photos: Causes and the Settings That Fix Them and Best Canon Camera Settings for Beginners. If you want these steps on one page to keep in your bag, the settings cheat sheets are in the theCamera.School store.