Canon Imaging Plaza, an official Canon YouTube channel dedicated to showing off the latest Canon technologies and cameras, has shared a video highlighting the benefits of its new full-frame RF lens mount and the advantages it has over older lens mounts, such as its own EF mount.
The four-and-a-half-minute video uses CGI renderings and example images to show off the various benefits Canon's RF mount offers and the technology that goes into its RF lenses.
A rendering comparison from the video showing how the light can be better controlled through elements when the elements are able to be placed close to the imaging sensor.
The narrator addresses the shorter back focus distance and larger diameter mount, which allows Canon to move the rear-most elements in lenses closer to the sensor, which it says helps to minimize chromatic aberration and allows engineers to get more creative with lens designs. Having the rear-most lens elements close to the sensor creates its own problems though, which leads the video to Canon's SubWavelength Structure Coating (SWC) and Air Sphere Coating (ASC) technologies, which are designed to minimize ghosting and flaring in images.
A comparison shot from the video that shows how the shorter back focus distance and larger diameter mount can yield better image quality—especially near the edges of the frame—thanks to better aberration control.
The video also mentions the additional contacts found in the RF lens mount, which are designed to increase the bandwidth of data and power that flows to and from the lens through the camera.
While this video is clearly about Canon's RF mount, the pros (and cons) of larger-diameter lens mounts and shorter back focus distances also apply to Nikon's new Z mount, which is both larger in diameter (55mm to the RF's 54mm) and features a closer flange focal distance (16mm to the RF's 20mm).
. dpreview.com2019-6-18 21:02
