Canon RF 75-300mm f/4-5.6 DC vs Canon RF 100-300mm f/2.8 L IS USM

Both are Canon RF mount zooms for telephoto and sports & action — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Canon RF mount · prices change — check the retailer

Spec	Canon RF 75-300mm f/4-5.6 DC	Canon RF 100-300mm f/2.8 L IS USM
Focal length	75-300mm	100-300mm
Max aperture	f/4-5.6	f/2.8
Type	zoom	zoom
Coverage	full-frame	full-frame
Mount	Canon RF	Canon RF

Which should you buy?

the Canon RF 100-300mm f/2.8 L IS USM opens wider (f/2.8) — brighter in low light and more background blur
the Canon RF 75-300mm f/4-5.6 DC covers 75-300mm and the Canon RF 100-300mm f/2.8 L IS USM covers 100-300mm — pick the range that matches what you shoot

Where to buy

Canon RF 75-300mm f/4-5.6 DCSee price on Amazon We could not find this one on Amazon US in Canon RF — this button runs an Amazon search for it rather than opening a product page.

Amazon links are affiliate links — we may earn a commission at no extra cost to you.

Canon RF100-300mm F2.8 L is USM, RF Lens, Mirrorless, Telephoto Zoom, Optical Image Stabilization, Professional, High-en

Canon RF 100-300mm f/2.8 L IS USMSee price on Amazon

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which lenses we compare.

FAQ

What's the difference between the Canon RF 75-300mm f/4-5.6 DC and the Canon RF 100-300mm f/2.8 L IS USM?
The Canon RF 75-300mm f/4-5.6 DC is 75-300mm f/4-5.6 zoom, full-frame; the Canon RF 100-300mm f/2.8 L IS USM is 100-300mm f/2.8 zoom, full-frame. Both fit the Canon RF mount.

Which is better in low light, the Canon RF 75-300mm f/4-5.6 DC or the Canon RF 100-300mm f/2.8 L IS USM?
The Canon RF 100-300mm f/2.8 L IS USM — its f/2.8 maximum aperture lets in more light and gives more background blur than the f/4-5.6 of the other.

Do the Canon RF 75-300mm f/4-5.6 DC and Canon RF 100-300mm f/2.8 L IS USM fit the same camera?
Yes — both are Canon RF mount lenses, so they fit Canon EOS R series (full-frame R5/R6/R8) and APS-C (R7/R10/R50).

Citing these specs? Go ahead — manufacturer data, last verified 2026-09-01. Copy a ready-made reference:

More Canon RF comparisons: Canon RF 35mm f/1.8 Macro IS STM vs Canon RF 85mm f/2 Macro IS STM · Canon RF-S 10-18mm f/4.5-6.3 IS STM vs Canon RF 10-20mm f/4 L IS STM · Canon RF 800mm f/5.6 L IS USM vs Canon RF 1200mm f/8 L IS USM · Canon RF 100mm f/2.8 L Macro IS USM vs Laowa 100mm f/2.8 2x Ultra Macro APO · all Canon RF lenses · all comparisons

Canon RF 100-300mm f/2.8 L IS USMAffiliate linkSee price on Amazon