Canon came out with a "too good to pass up" one week 30% off sale on a very useful lens. [note: the sale didn't end the day after I purchased but it was cut in half]
Canon describes some of the features of the lens as follows:
The RF100mm F2.8 L MACRO IS USM Lens is the world’s first* medium telephoto AF Macro lens with a maximum magnification ratio of 1.4x. At its minimum focusing distance of 0.86 ft. / 0.26m, the RF100mm F2.8 L MACRO IS USM is capable of capturing detailed images while being remarkably versatile in operation.
The RF100mm F2.8 L MACRO IS USM lens distinguishes itself by maintaining incredibly high image quality, edge-to-edge, even wide open at its f/2.8 maximum aperture. With 17 elements in 13 groups and a 9-blade aperture system, it can deliver detailed images with gorgeous background blur and versatility in low light.
Because RF lenses are designed specifically for the RF Mount found on EOS R series cameras, the lens and camera combine to share shooting data, helping to dramatically reduce the effect of camera shake that can occur when using handheld. This applies when capturing both stills and video, with up to 5 stops of stabilization** for accurate and clear imagery.
The RF100mm F2.8 L MACRO IS USM features Canon’s first adjustable Spherical Aberration (SA) control ring on the lens barrel that allows you to adjust the depiction of the image’s background bokeh. Used to add a unique emphasis to your imagery, the SA Control Ring allows the user to change the shape and character of the foreground and background bokeh. A minus setting creates a dreamy, soft-focused look, while a Plus setting creates a bubble-bokeh-type look.
Here are my first shots testing out the lens at Oakwood Cemetery: