Sony a100 vs Canon EOS R3

This is a full comparison between the cameras Sony a100 and Canon EOS R3. We compare them by looking at the categories you see below.

Manufacturing

Sony a100 is manufacturered by Sony but Canon EOS R3 is from Canon. Both Sony and Canon are well known brands though.

Sony a100 were released 2006 and Canon EOS R3 was released 2021. That is a 15 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Sony a100 2006
Canon EOS R3 2021

Type of camera

Sony a100 is a DSLR camera while Canon EOS R3 is a Mirrorless camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Sony a100 has a "Sony APS-C"-sensor while Canon EOS R3 has a "Canon Full Frame"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

Camera Focal length, 50mm f/1.8 **
Sony a100 75 mm
Sony APS-C sensor
Crop factor/focal length multiplier by * 1.5
Canon EOS R3 50 mm
Full-frame sensor
No crop factor/focal length multiplier

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Sony)
Camera selection can affect the focal length (Canon)

Resolution

Sony a100 has a 10 MP (Megapixels) resolution while Canon EOS R3 has 24 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Sony a100 10 MP
10036224 pixels
3872 x 2592
Canon EOS R3 24 MP
24000000 pixels
6000 x 4000

Canon EOS R3 has a 139 % larger resolution than Sony a100. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Canon EOS R3 has a larger ISO-range than Sony a100. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Sony a100 has 100 to 1600.

Camera ISO Range
Sony a100 100-1600
Canon EOS R3 100-102400

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Worth mentioning is that Canon EOS R3 belongs to the Canon EOS R-system and needs an adapter to work with Canons EF, EF-S, MP-E, and TS-E lenses. You can read more about this adapter here:
Canon Lens Mount Adapter EF-EOS R

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a100
Lens compatibility chart for Canon EOS R3

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a100 can shoot up to 3 pictures per seconds and Canon EOS R3 can shoot up to 30 pictures per seconds.

Camera FPS (Frames per second)
Sony a100 3
Canon EOS R3 30

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

It is only one of these two cameras that support recording movies and movie clips and that is Canon EOS R3. Sadly, the Sony a100 does not support this.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Canon EOS R3 weighs 1015 gr (equal to 2.24 lb) which is 59% heavier than Sony a100 and its 638 gr (or 1.41 lb).

Camera Weight
Sony a100 638 gr
1.41 lb
Canon EOS R3 1015 gr
2.24 lb

Sony a100 vs Canon EOS R3 Specs

Below you will find the complete and detailed technical specs for both Sony a100 and Canon EOS R3, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product
Sony a100
Canon EOS R3
Name Sony a100 Canon EOS R3
Manufacturer Sony Canon
Release Date and Price
Sony a100
Canon EOS R3
Release Year 2006 2021
Release Date 2006-06-05 2021-04-14
MSRP 899 USD 5999 USD
Buy it today
Camera Type
Sony a100
Canon EOS R3
Camera Type DSLR Mirrorless
Sensor
Sony a100
Canon EOS R3
Sensor Size APS-C (approx 23.5 x 15.6 mm) Full Frame (approx 36 x 24 mm)
Sensor Type CCD Stacked CMOS
Resolution 3872 x 2592 pixels 6000 x 4000 pixels
Megapixels 10 MP 24 MP
Image Processor Bionz DIGIC X
Image
Sony a100
Canon EOS R3
ISO Range 100 - 1600 100 - 102400
White Balance Presets 7 6
Custom White Balance Yes No
Image Stabilization Yes
(Sensor-Shift)
Yes
(Sensor-Shift)
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Sony a100
Canon EOS R3
Autofocus Motor Yes Yes
Autofocus Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Touch
Face Detection
LiveView
Focus Points 9 1053
Lens Mount Sony A

See Compatible Lenses
Canon RF

See Compatible Lenses
Focal Length Multiplier APS-C Sensor (1.5x)
1.5x multiplier
Example:
24 mm becomes 36 mm
50 mm becomes 75 mm
100 mm becomes 150 mm
200 mm becomes 300 mm
Full frame
No multiplier
Example:
24 mm remains 24 mm
50 mm remains 50 mm
100 mm remains 100 mm
200 mm remains 200 mm
Screen & Viewfinder
Sony a100
Canon EOS R3
Articulated LCD No Fully articulated
Screen size 2.5” 3.2”
Screen dots 230000 4150000
Touch screen No Yes
Screen type N/A TFT LCD
Live view No Yes
Viewfinder Type Optical (pentamirror) Electronic
Viewfinder Coverage 95% 100%
Viewfinder Magnification 0.83× (0.55× 35mm equiv.) 0.76×
Viewfinder Resolution N/A 5760000
Photography features
Sony a100
Canon EOS R3
Frames per second 3 fps 30 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/4000 seconds 1/8000 seconds
Built-in Flash Yes No
Built-in Flash Range N/A N/A
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse No Yes
Metering modes Multi
Center Weighted
Spot
Multi
Center Weighted
Spot
Partial
Exposure Compensation +/- 2 (at 1/3 EV steps) +/- 3 (at 1/3 EV, 1/2 EV steps)
Videography features
Sony a100
Canon EOS R3
Video recording No Yes
Video format N/A MPEG4
H.264
H.265
Video resolution N/A 1920 x 1080
3840 x 2160
4096 x 2160
Built-in Microphone No Yes
Built-in Speakers No Yes
Storage
Sony a100
Canon EOS R3
Memory Card Compact Flash
Compact Flash Express
SD/SDHC
Connectivity
Sony a100
Canon EOS R3
HDMI Output No Yes
Microphone Port No Yes
Headphone Port No Yes
Wireless No Yes
Built-in (802.11ac + Bluetooth)
Remote Control Yes (Wire (Optional)) Yes (via smartphone)
GPS No Yes
Built-in
Body & Dimensions
Sony a100
Canon EOS R3
Enviromentally sealed No Yes
Battery Battery Pack Built-in
Battery Details Lithium-Ion (NP-FM55H) & charger
LP-E19 lithium-ion battery & charger
Battery Life (CIPA) 750 shots 760 shots
Width 133 mm 150 mm
Height 95 mm 143 mm
Depth 71 mm 87 mm
Weight 638 gram 1015 gram