Canon’s RF800mm F11 IS STM ($899 on Amazon) has received one of the more substantial Canon discounts during Amazon’s Prime Big Deal Days. The super telephoto prime is currently listed at $899, down 25% from its $1,198 list price. Amazon also marks the offer as a 90-day low price. For photographers who specifically need extreme reach, the deal brings a native Canon RF 800mm lens below the $1,000 threshold. But this is also a highly specialized optic, and the fixed f/11 aperture remains the main consideration before buying.

📦See the Canon RF800/11 on Amazon

800mm for $899

The RF800mm F11 IS STM was designed around a relatively unusual concept: provide full frame Canon RF shooters with genuine 800mm reach without the size, weight, and price normally associated with professional super telephoto primes. At the current $899 Prime Big Deal Days price, that proposition becomes more attractive. An 800mm focal length is particularly useful for bird photography, wildlife, aviation, distant sports, and other subjects where getting physically closer is difficult or impossible. On a high resolution EOS R body, photographers also retain some flexibility for additional cropping. The tradeoff is right there in the product name: f/11.

The f/11 limitation

This is not an RF 800mm f/5.6L substitute. The RF800mm F11 uses a fixed f/11 aperture, meaning it is considerably slower than Canon’s professional super telephoto lenses. In strong daylight, that compromise can be perfectly workable. As light levels fall, however, maintaining sufficiently fast shutter speeds can require significantly higher ISO settings. That distinction is especially important with moving wildlife or birds in flight, where shutter speeds may already need to remain high. For buyers considering the lens primarily for daytime wildlife, airshows, outdoor sports, or bright landscape work, f/11 may be an acceptable tradeoff for obtaining 800mm reach at this price. For dawn, dusk, indoor sports, or situations where subject isolation and low light performance are priorities, it becomes much more restrictive.

Image stabilization makes 800mm more practical

Canon equips the lens with optical image stabilization, an important feature at a focal length this long. Even small camera movements become very noticeable at 800mm. The RF800mm F11 IS STM also uses Canon’s STM focusing system and was designed as a comparatively lightweight, portable alternative to traditional large aperture super telephoto lenses. Professional 800mm primes are enormous pieces of equipment costing many times more. The RF800mm F11 instead targets photographers who want access to the focal length without making an investment at that level. There are compromises in construction, aperture, and overall versatility, but the difference in cost is equally dramatic.

Who should consider it?

At $899, the RF800mm F11 makes the most sense for photographers who already know they need 800mm. For general wildlife photography, a zoom can still be more practical because subjects rarely remain at exactly the right distance for an 800mm prime. A lens such as Canon’s RF200 800mm gives photographers substantially more compositional flexibility, albeit at a higher price. The RF800mm F11 is therefore less of an all purpose wildlife lens and more of a dedicated long reach tool. Bird photographers working from established locations, aviation photographers shooting distant aircraft, and users who regularly find 400mm or 600mm insufficient are more likely to benefit from what it offers.

Bottom line

Amazon’s Prime Big Deal Days discount brings the Canon RF800mm F11 IS STM to $899, 25% below its listed $1,198 price. That does not change the fundamental character of the lens. The fixed f/11 aperture remains a substantial limitation, particularly in poor light. But buyers who can work within that constraint are getting an unusually affordable route to native 800mm RF reach. For the right photographer, that makes this one of the more interesting Canon lens discounts appearing during the sale.

📦See the Canon RF800/11 on Amazon

More Prime Big Deal Days camera and lens deals

Canon is not the only major camera brand receiving notable discounts during Amazon’s Prime Big Deal Days. Y.M.Cinema has also been tracking several of the stronger camera and lens offers from Nikon and Sony.

• Nikon Z6 II Drops 26% to $1,297 During Amazon Prime Big Deal Days: Nikon’s full-frame Z6 II has fallen to $1,297, making it one of the more substantial camera-body discounts we have seen during the event.
• Sony Lens Deals at Amazon Prime Big Deal Days: Up to 25% Off G and G Master Glass: Sony’s Prime Big Deal Days offers include discounts across selected G and G Master lenses, with reductions reaching 25%.
• Sony FX3 Drops to Its Lowest Amazon Price of 2026 During Prime Big Deal Days: The Cinema Line FX3 has also dropped below $4,000, reaching its lowest Amazon price of the year.