Here is something useful. A video about hot to do autofocus microadjustment.
The 14 minutes video below by Michael The Maven shows how to microadjust autofocus on your lens using a cereal box and a ruler. He uses a Canon EOS 90D to show it.
The cereal box and ruler method allows photographers to quickly visualize where their lenses are focusing and to verify if they are out of alignment. This video demonstrates the philosophies of MFA (micro focus adjustment) and some of the principles to become familiar with if you decide to try this on your own.
If you prefer there is a neat written tutorial about how to do autofocus microadjustment by Canon itself and you can download it here.
Why do these professional broadcasting lenses have to have such weird monikers? Canon just announced two 8K capable broadcast lenses, the UHD-DIGISUPER 51 and 7×10.7 KAS S 8K lenses.
Canon press release:
Canon U.S.A. Introduces Its First Two 8K Broadcast Lenses
UHD-DIGISUPER 51 and 7×10.7 KAS S Lenses Provide Cutting Edge Imagery Solutions for Sports and Event Production
MELVILLE, NY, November 6, 2019 – Canon U.S.A., Inc., a leader in digital imaging solutions, today announced the launch of its first two 8K Broadcast lenses: the UHD-DIGISUPER 51 (SP51x15.5B), a long-zoom field lens, and the 7×10.7 KAS S, a portable zoom lens. These two new zoom lenses are compatible with 8K broadcast cameras equipped with 1.25-inch sensors.
“8K broadcasting equipment is the newest frontier for covering sporting events and documentary productions around the globe,” said Kazuto Ogawa, president and chief operating officer, Canon U.S.A., Inc. “Through the addition of our first 8K broadcast lenses, Canon is cementing our position on the cutting edge of the latest ultra-high resolution digital imaging solutions.”
UHD-DIGISUPER 51 8K Lens
The UHD-DIGISUPER 51 8K field zoom lens provides high-quality optical performance for 8K broadcast cameras from the center to the periphery of the screen. The lens is built with the world’s highest1 51x zoom, as well as the world’s longest1 focal range from the wide-angle end of 15.5mm to the telephoto end of 790mm. In addition, the lens also features a built-in 1.5x extender that increases the maximum focal length to 1185mm. With the ability to realize high magnification, this lens provides users the same operability as a conventional 2/3-inch HDTV or 4K field zoom lens, allowing them to switch to 8K video shooting and production without changing the shooting style.
7×10.7 KAS S 8K Lens
Featuring a 7x zoom that covers a focal range of 10.7-75mm, the new 7×10.7 KAS S is ideal for a variety of broadcasting applications. From the center of the screen to the corners of the periphery, this lens has the resolution and contrast compatible with 8K broadcast cameras, while also having the same operability as a conventional 2/3-inch HDTV or 4K portable zoom lens. The 7×10.7 KAS S is equipped with key features designed to provide customers with a high-quality, user-friendly experience, including the mobility required for on-the-move shooting.
We expect Canon to announce three new Canon RF lenses for theCanon EOS R system, RF 15-35mm f/2.8L IS, RF 24-70mm f/2.8L IS, and RF 70-200mm f/2.8L IS.
These lenses will most likely be announced along with the Canon EOS 90D and the EOS M6 Mark II. All are expected to be announced on August 28th, 2019. Specifications (90d | M6 Mark II) and promotional videos (90D | M6 Mark II) for both cameras have already leaked.
The suggested prices for the three new RF lenses appear to have leaked in Thailand, and so starting from the price in Thai Baht we can get an idea about where the US$ prices will be.