Pros & Cons
Pros
- Exceptional autofocus speed, particularly for action and sports photography.
- Excellent image quality with sharpness that rivals prime lenses.
- Versatile focal range from 100-300mm, providing flexibility for various shooting scenarios.
- Relatively lightweight for its class, making it easier to handle for extended periods.
- Good performance even when used with teleconverters, maintaining reasonable sharpness.
Cons
- High price point at around $10,000, making it inaccessible for many enthusiasts.
- Some users report noticeable sharpness loss when using the 2x teleconverter.
- Limited appeal for casual photographers due to its specialized nature.
- The lens may become heavier and harder to balance when extended with teleconverters.
Verdict
Overall, the community views the Canon RF 100-300mm f/2.8L IS USM as a remarkable lens that excels in autofocus speed and image quality, particularly for professional sports and wildlife photographers. However, its steep price and specific use case limit its accessibility and appeal to casual shooters.
Specifications
| Focal Length | 100-300 mm |
| Max Aperture | f/2.8 |
| Min Aperture | f/22 |
| Mount | RF |
| OIS | Yes |
| AF Motor | Dual Nano USM |
| Weight | 2650g |
| Dimensions | 128 x 323.4 mm |
| Weather Sealed | Yes |
| Diaphragm Blades | 9 |
Frequently Asked Questions
Is the RF 100-300mm f/2.8L IS USM compatible with Canon's RF 1.4x or 2x teleconverters?
Yes, this lens is fully compatible with both the RF 1.4x and 2x extenders. The 1.4x provides excellent results with minimal loss in sharpness or AF speed, while the 2x introduces more noticeable softness and some reduction in autofocus performance-recommended only when absolutely necessary for reach.
How does this lens compare to prime telephotos like the RF 300mm f/2.8L or EF 300mm f/2.8L?
The RF 100-300mm f/2.8L delivers image quality very close to the legendary 300mm f/2.8 primes, but with the added flexibility of a zoom. Sharpness, bokeh, and autofocus match or even surpass those of earlier primes, though prime lenses may still have a slight edge in reach and ultimate maximum aperture sharpness.
Is it practical to use the lens handheld for sports or outdoor events?
Handholding is certainly possible for shorter periods-thanks to the surprisingly balanced weight and excellent image stabilization. However, for prolonged shooting, a monopod or tripod is advisable to reduce fatigue, especially if teleconverters are attached.
What are the main competitors to this lens?
The closest competitors are Canon's own RF 100-500mm f/4.5-7.1L IS USM (which is lighter and has more reach but a slower aperture), and legacy super-telephoto primes adapted from EF mount. No other full-frame mirrorless system currently offers a 100-300mm f/2.8 zoom, making this lens uniquely positioned for RF users.
Can I use this lens for portrait or event work?
Absolutely. The wide f/2.8 aperture and pleasing bokeh make it an excellent option for environmental portraits or isolating subjects in even the busiest event settings. However, its size and weight make it less convenient than smaller primes or shorter zooms for extended work.
Is the lens fully weather sealed?
Yes, the RF 100-300mm f/2.8L IS USM features extensive weather sealing throughout the barrel, control rings, and mount, making it safe to use in inclement weather conditions when paired with weather-sealed RF-mount cameras.
Compatible Cameras
Camera bodies that work with this lens
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