# Canon patent hints at 70-200mm f/2 lens

> Canon's patent suggests a brighter 70-200mm f/2 lens could be possible.
- Title: Canon patent hints at 70-200mm f/2 lens · Digital Camera World
- Summary: Canon's patent suggests a brighter 70-200mm f/2 lens could be possible. Canon's patent shows a design for a compact 70-200mm f/2 lens using three focus…
- Keywords: canon, rf 28-70mm f/2l, patent, 70-200mm f/2, focusing groups, lens design, hints, 70-200mm, lens, Digital Camera World
- Source: Digital Camera World — https://digitalcameraworld.com/cameras/lenses/canons-rf-28-70mm-f-2l-is-a-popular-lens-but-is-a-longer-f-2-zoom-in-the-works-patent-hints-at-brighter-smaller-zooms
- Published: 2026-10-19T19:47:08+00:00
- Read time: 1 min
- Topics: canon, rf 28-70mm f/2l, patent, 70-200mm f/2, focusing groups, lens design
## Canon RF 28-70mm f/2L popularity
The Canon RF 28-70mm f/2L USM is a popular pro lens with an unusually bright aperture.
## Recent patent details
A recent patent published in Japan on October 16 details a design for a compact high-performance zoom lens using three or more focusing groups.
## Patent's 70-200mm f/2 reference
The patent references a potential 70-200mm f/2 lens among other lenses like a 50-85mm f/1.4.
## Three focus groups benefit
Using three or more focus groups helps shorten the distance between optical groups for a brighter lens without significant size increase.
## Canon's prior patent work
Canon previously explored using three focus groups to increase focusing performance in another patent this year.
## 28-70mm f/2L weight
The Canon RF 28-70mm f/2L USM weighs 3.1 pounds / 1430g, heavier than the RF 70-200mm f/2.8L IS USM.
## Patent doesn't guarantee product
Canon's patent doesn't guarantee a real product, as many patents filed yearly don't become actual lenses.
## Key takeaway

Canon's patent shows a design for a compact 70-200mm f/2 lens using three focus groups.