Are RF Lenses Lighter than EF?: 1 Minute to Understand Lens Weight Differences

RF lenses and EF lenses are both designed by Canon, but for different camera systems. EF lenses are built for Canon’s DSLR cameras, while RF lenses are specifically made for Canon’s full-frame mirrorless cameras (the EOS R system). Many photographers wonder if RF lenses are lighter than their EF counterparts, especially when considering portability and ease of use.

In general, RF lenses are not universally lighter than EF lenses, though some models are. The weight difference relies on several factors, such as lens construction, maximum aperture, focal length, and added technology (like image stabilization or autofocus motors). For instance, the Canon RF 50mm f/1.2L is slightly lighter than the EF 50mm f/1.2L, but RF zoom lenses (like the RF 24-70mm f/2.8L) can be heavier than similar EF zooms because of their updated optical formula and additional electronics.

From a design perspective, RF lenses leverage the mirrorless system’s shorter flange distance, allowing lens designers more freedom to create advanced optics with potentially improved image quality, autofocus speeds, and image stabilization. However, this doesn’t always translate into lighter lenses—it often prioritizes optical performance and new technology. As a designer, I always weigh the trade-offs between compactness, weight, and optical excellence. If weight is a driving factor when selecting gear, be sure to check the specific lens’ product page for actual grams or ounces.

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Tips 1:

When comparing lenses, don’t just consider the lens itself—look at the total kit weight with adapters, bodies, and accessories. Sometimes a slightly heavier lens can be offset by a lighter body or a more compact kit.

FAQ

Q: Are RF lenses always lighter than EF lenses?

A: No, RF lenses are not consistently lighter than EF lenses. Some are lighter, but others, especially high-performance RF lenses, might be heavier due to more advanced optical designs.

Q: Why aren’t all RF lenses lighter if mirrorless cameras have a shorter flange distance?

A: The shorter flange distance gives designers flexibility, but many RF lenses incorporate more glass elements and technology for performance, which can add weight.

Q: Which RF lens is the lightest compared to its EF equivalent?

A: Prime lenses like the RF 35mm f/1.8 Macro IS STM tend to be lighter than similar EF models, while fast aperture and zoom RF lenses may not be lighter.

Q: Does lens weight affect image quality?

A: Not directly; heavier lenses may have more glass or features, but manufacturers aim to balance weight and image quality in each design.

Q: What should I consider apart from lens weight when choosing between RF and EF?

A: Consider autofocus speed, image stabilization, compatibility, features, and your camera body for optimal performance and usability.