Canon RF 15-35mm vs RF 24-240mm: Which RF Zoom to Buy?
By The Camera Gear Shop | Published: 2026-11-01
Category: Comparisons
Compare the Canon RF 15-35mm f/2.8L and RF 24-240mm f/4-6.3: one is a fast wide-angle zoom, the other a 10x all-in-one. See which fits your shooting.
Quick answer
Choose the Canon RF 15-35mm f/2.8L IS USM if you shoot landscapes, architecture or low light and want a fast, stabilised wide-angle zoom. Choose the Canon RF 24-240mm f/4-6.3 IS USM if you need one portable lens that covers wide to telephoto for travel and everyday flexibility.
Aperture and low-light capability
The RF 15-35mm has a constant f/2.8 aperture, while the RF 24-240mm starts at f/4 and narrows to f/6.3 at the long end. That difference matters most in dim conditions: the f/2.8 lens lets in more light, so you can handhold in lower light or use faster shutter speeds without pushing ISO as high. The RF 24-240mm's slower aperture is a deliberate trade-off for its huge zoom range, and it performs best in good light or with stabilisation.
Focal range and versatility
The RF 15-35mm covers ultra-wide to wide-normal, which is ideal for sweeping landscapes, interiors and architecture. The RF 24-240mm is a 10x superzoom that goes from wide-angle to frame-filling telephoto, so you can shoot a landscape and then zoom in on a distant detail without changing lenses. If you often carry one body and want to avoid swapping glass, the 24-240mm's range is a clear advantage; if your work is mostly wide, the 15-35mm's dedicated range and speed will serve you better.
Stabilisation and optical design
Both lenses offer image stabilisation, but the RF 15-35mm is specified at 5 stops and uses three aspherical and two UD elements for sharpness across the frame. The RF 24-240mm also has IS, though the catalog does not state a stop rating; that absence makes it harder to compare stabilisation directly. For handheld low-light work, the 15-35mm's rated 5 stops plus f/2.8 aperture give it an edge. For travel in daylight, the 24-240mm's stabilisation is still useful for steadying long focal lengths.
Trade-offs to weigh
- Speed vs range: The RF 15-35mm's f/2.8 aperture gives you more light and shallower depth of field, but only across a wide-angle range. The RF 24-240mm gives you a 10x range but a slower f/4-6.3 aperture. Decide whether low-light speed or all-in-one reach matters more for the majority of your shots.
- Specialisation vs convenience: The RF 15-35mm is a dedicated wide-angle zoom for landscapes and architecture. The RF 24-240mm is an all-in-one lens that can replace several lenses in a bag. If you regularly shoot wide and want the best optical performance there, the 15-35mm is the more focused tool; if you want to carry one lens, the 24-240mm wins on convenience.
- Stabilisation rating: The RF 15-35mm is rated at 5 stops of IS; the RF 24-240mm's IS stop rating is not stated in the catalog. Use the 15-35mm's rating as a known advantage for handheld low-light work. When comparing stabilisation, treat the 15-35mm's 5-stop rating as a concrete data point and the 24-240mm's as unquantified.
Key product facts
- Canon RF 15-35mm f/2.8L IS USM Lens: Constant f/2.8 aperture, 5 stops of image stabilisation, and three aspherical plus two UD elements. The fast aperture and rated stabilisation help in low light, while the special elements support sharpness for landscape and architecture detail.
Canon RF 15-35mm f/2.8L IS USM Lens - Canon RF 24-240mm f/4-6.3 IS USM Lens: 10x zoom range from 24mm to 240mm, described as portable and versatile for wide-angle to close-up sport and wildlife. One lens covers everything from landscapes to distant subjects, so you can travel light and react quickly without changing lenses.
Canon RF 24-240mm f/4-6.3 IS USM Lens
Which RF zoom fits you?
Best for
- Landscape and architecture photographers who need a fast, sharp wide-angle zoom
- Low-light handheld shooters who value a constant f/2.8 aperture and 5-stop stabilisation
Not for
- Travelers who want one lens for wide to telephoto and rarely shoot in low light
- Photographers who need reach beyond 35mm without changing lenses
