The Canon 5D Mark III is a full frame DSLR aimed at serious stills work, while the 80D is a crop sensor DSLR with a modern touchscreen and strong live view. Choose the 5D Mark III for portraits, weddings and low light. Choose the 80D for a lighter body, video-friendly features and extra telephoto reach. Confirm details on Canon’s pages.
Where Each Camera Fits
The 5D Mark III sits in the professional-leaning end of Canon’s DSLR line, with a large sensor and a robust body. The 80D is an enthusiast model with a smaller APS-C sensor, which keeps the camera lighter and gives lenses about 1.6 times their stated reach.
Main Differences
- Sensor: Full frame in the 5D Mark III, APS-C in the 80D.
- Low light and background blur: The larger sensor usually helps with both.
- Screen: The 80D has a screen that tilts and swivels and responds to touch. The 5D Mark III has a fixed screen with no touch control.
- Live view focus: The 80D is known for smooth autofocus in live view and video, which is a plus for vloggers.
- Viewfinder autofocus: The 5D Mark III has a well-regarded focus system for stills with moving subjects.
- Memory cards: The 5D Mark III has two card slots, handy for backup. The 80D has one.
- Size and weight: The 80D is smaller and lighter for travel.
Lens Planning
Both accept Canon EF lenses. Lenses made for APS-C (EF-S) only fit the 80D. If you buy full frame glass first, it works on both, which keeps upgrade paths open. Wide angles show more of the scene on full frame, while the crop of the 80D favors wildlife and sports with a long lens.
Choosing by Workflow
If you work in dim venues, shoot for clients who expect backup copies, or want a very shallow look, the full frame body with two slots is the more natural fit. If you travel, walk long days or film short clips, the lighter body with a flip screen is easier to live with. Think about the bag you will carry and the shots you miss most often, then choose the body that removes that frustration.
Side by Side
| Trait | 5D Mark III | 80D |
|---|---|---|
| Sensor | Full frame | APS-C |
| Screen | Fixed | Tilting touchscreen |
| Card slots | Two | One |
| Live view and video focus | Basic | Smooth |
| Weight | Heavier | Lighter |
FAQ
Which is better for video?
The 80D has handling features that suit video work, such as the articulated touchscreen and live view focus. The 5D Mark III offers a full frame look. Think about how you like to work.
Which is better for events?
Many event shooters like the 5D Mark III for low light and dual cards. The 80D can work well in good light.
The Short Version
Choose the 5D Mark III for full frame quality, dual cards and tough handling. Choose the 80D for lighter weight, a flexible screen and easy video focus. Match the body to your most common shoot.
