The RF 800mm f/11 is the niche reach pick. At $900 it's the cheapest way into 800mm on Canon RF, and the retractable barrel collapses for travel in ways no other 800mm option does. The f/11 fixed aperture is the price you pay — this is a bright-daylight lens, not a low-light tool. Best for daytime bird and wildlife shooters who specifically want 800mm without paying $1,900+ for the RF 200-800mm zoom.
Strengths
- +First compact, lightweight 800mm super-telephoto in Canon's RF lineup
- +Retractable design collapses for travel — fits in a carry-on with room to spare
- +Diffractive Optic (DO) design controls chromatic aberrations at the long end
- +Fixed f/11 aperture means consistent exposure across focus distances
- +Less than half the price of the RF 200-800mm zoom
Watch-outs
- −f/11 fixed aperture is dim — requires bright light or high ISO
- −Single 800mm focal length (no zoom flexibility)
- −Not weather sealed like the L-series options
- −AF performance drops in lower light — most useful in good daylight
How it compares
Cheapest path to 800mm on Canon RF. Less flexible than the RF 200-800mm zoom but lighter and far cheaper. Same DO design as the RF 600mm f/11 sibling. Loses to the RF 100-500mm L and RF 70-200mm F2.8 on aperture brightness.
Who this is for
At a glance: daytime birders and budget wildlife shooters who need 800mm reach and can work within the f/11 fixed-aperture constraint.
Why you’d buy the Canon RF 800mm F11 IS STM
- First compact, lightweight 800mm super-telephoto in Canon's RF lineup.
- Retractable design collapses for travel — fits in a carry-on with room to spare.
- Diffractive Optic (DO) design controls chromatic aberrations at the long end.
Why you’d skip it
- f/11 fixed aperture is dim — requires bright light or high ISO.
- Single 800mm focal length (no zoom flexibility).
- Not weather sealed like the L-series options.
Rating sources
Our 4.5 score is the average of these published ratings. More about methodology.
