Canon has updated their popular 70-200mm f/2.8 L IS and f/4 L IS lenses. The EF 70-200mm f/2.8L IS III USM uses the same optics as the previous version, but it now features updated optical coatings. An Air Sphere Coating (ASC) has been combined with updated Super Spectra Coatings that Canon claims significantly reduces lens flare and ghosting.
EF 70-200mm f/2.8L IS II USM
The 70-200mm f/2.8L IS II USM was well regarded by both photographers and videographers as a being one of the sharpest telephoto zooms around. Instead of trying to improve on the optical design Canon instead focused on putting better coatings on the 70-200mm f/2.8L IS II USM. The new coatings are said to reduce ghost and flaring particularly when shooting in heavily backlit situations.
What is Air Sphere Coating (ASC)?
Air Sphere Coating (ASC) is a special coating that Canon is using. It consists of a film of silicon dioxide and air over a vapour deposition coating. This film forms a surface that has a lower refractive index that optical glass. The way Air Sphere Coating (ASC) works is that it reduces reflected light from entering the lens. According to Canon, this allows more light to enter the lens instead of it being reflected off the glass. This ASC helps combat aberrations regardless of focal length or the angle of light. Canon also claims this helps provide cleaner images with fewer distracting reflective effects.
The more things change, the more they stay the same
Apart from the change to the coatings, it’s a case of if it ain’t broke, don’t fix it. The AF speed and response, IS, and minimum focus distance are exactly the same as on the 70-200mm f/2.8L IS II USM. The only change to the exterior of the lens is a change to a slightly whiter colour that matches Canon’s newer super telephoto zooms.
EF 70-200mm f/4L IS II USM
How does the EF 70-200mm f/4L IS II USM compare to the EF 70-200mm f/2.8L IS III USM?
What about other Canon lens updates?
While it’s nice to see Canon updating their 70-200mm telephoto zooms I can’t help but wonder why they haven’t yet updated other lenses such as the very popular 17-55mm f/ 2.8 IS. It would also be nice to see IS added to the 24-70mm f/2.8L IS USM. Canon seem to have also abandoned the 50mm f/1.2L USM, with only a new 50mm f/1.4 USM being rumoured to be released this year.
What do you think about these new lenses from Canon? Would you consider updating your 70-200mm? Let us know in the comments section below.