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     * How Image Sensors Work
     * How Lenses Work
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     * Online
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     * Camcorders
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HomeNews
News


CANON PUBLISHES PATENTS FOR FIVE NEW LENSES



By Pete Tomkies

Canon has published patents for five new lenses in Japan. The patents were first
submitted to the Japanese Patent Office in January 2023 and officially published
this week.


WIDE-ANGLE ZOOMS

Two of Canon’s newly published patents are for what are described as compact
wide-angle zoom lenses. The lenses cover the zoom ranges of 15-28 mm and 17-30
mm. Both lenses also have a constant wide maximum aperture of f/2.8. Canon
already makes 14-35 mm f/4 IS and 15-35 mm f/2.8 IS lenses in its L-Series with
similar focal length ranges. Given Canon’s use of the term “compact” to describe
these lenses, it could be that the patents will deliver smaller or lighter
lenses.

Patent for a 17-30mm f/2.8 lens. Image courtesy: Canon


TELEPHOTO ZOOMS

Canon’s three other new patents all relate to telephoto zoom lenses. The patents
cover lenses with the focal length ranges of 70-300 mm, 300-600 mm and 400-600
mm. As with the wide-angle zoom patents, the telephoto zoom lenses are designed
to have a compact design. The 70-300 mm lens has a constant maximum aperture of
f/4. However, the other two lenses are shown as having variable f/2.8-4.5
maximum apertures.


Patent for a 300-600mm f/2.8-4.5 lens. Image courtesy: Canon


LENS MOUNTS

The patents cover the optical design of the lenses and don’t indicate the lens
mount. However, the most likely option would be Canon’s RF mount. In addition,
Kengo Iezuka, who oversees planning lenses at Canon, gave an interview about RF
lenses recently. During the interview, Iezuka said, “There are still many lenses
that have not been released to the world. I can’t talk about the specifics, but
there are lenses with basic specifications, and lenses with specifications that
have never been seen before and that no one can imagine yet.”


WHAT WE THINK

Until recently, Canon has prevented other manufacturers from making RF mount
lenses. Now the company is beginning to open the market to other lens makers,
Canon needs to keep innovating. The new patents show that Canon is working hard
to develop exciting new lenses for its RF mount cameras. However, as always,
where patents are concerned, it’s also important to remember that the process is
done primarily to protect technological development. The registration of a
patent doesn’t always result in a product coming to market.


Pete Tomkies
Pete Tomkies is a freelance cinematographer and camera operator from Manchester,
UK. He also produces and directs short films as Duck66 Films. Pete's latest
short Once Bitten... won 15 awards and was selected for 105 film festivals
around the world.


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