Leaked Canon 100mm F2.8L Macro IS USM press release

This speaks for itself.  The preorders for this lens will be fast and furious.

World's First Medium Telephoto Macro Lens with a Maximum Magnification of 1.4x 
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 0.26m, the RF100mm F2.8 L MACRO IS USM is capable of capturing detailed images while being remarkably versatile in operation. Whether capturing details of food, jewelry, or traditional macro shots, the RF100mm F2.8 L MACRO IS USM is a highly effective lens for macro photography. 

High Image Quality and Bright, Fixed f/2.8 Aperture Telephoto Macro RF Lens 
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. 

Optical Image Stabilizer with up to 5 Stops of Shake Correction 
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. 

Hybrid IS Compensates for Angular and Shift Camera Shake during Macro Shooting 
Equipped with the Hybrid IS technology, the Image Stabilizer of the RF100mm F2.8 L MACRO IS USM effectively reduces blurring in handheld macro photography by compensating for both angle and shift camera shake. This helps to deliver impressively clear, up-close results. 

Spherical Aberration (SA) Control Ring Allows Adjustments to Shape and Character of 
Foreground/Background Bokeh 
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. Adding a third ring to the lens, the SA Control Ring has a notable surface that can be differentiated from the Control Ring and Focusing Ring. A lock mechanism can be found on the side of the lens which locks the SA control ring to the middle position rendering standard, traditional operation, with no SA optical effects. 

Up to 8 stops of Shake Correction with Coordinated Optical Image Stabilizer and In-Body Image Stabilizer 
When combined with an EOS R series camera equipped with In-Body Image Stabilizer, the lens' Optical Image Stabilizer teams up with the In-Body Image Stabilizer to provide coordinated IS up to 8 stops, further helping to alleviate shaking for photos and video, and adjusting the ratio from optical to in-body stabilization automatically throughout the zoom range so you have the best of both worlds. 

High Speed, Smooth and Quiet Auto Focus with Dual Nano USM 
The RF100mm F2.8 L MACRO IS USM is equipped with dual independent Nano USMs to help achieve high-speed and focus accuracy throughout its focusing range. This helps you quickly focus and keep up with fast-moving subjects as well as provides smooth and virtually silent autofocus while shooting movies, so there is relatively no disturbance for you, the subject or in what you see visually and hear audibly during shooting and playback.

Control Ring for Direct Setting Changes 
The RF100mm F2.8 L MACRO IS USM lens has a separate, independent Control Ring that is located towards the front of the lens, which can be programmable for immediate exposure adjustments during still and video shooting. With the Control Ring, you can directly adjust settings such as shutter speed, lens aperture, exposure compensation and more. For photographers and moviemakers who would prefer a silent control ring, the clicking mechanism can be removed by a Canon service provider for a fee. 

Dust - and Weather-resistant 
For reliable performance even when weather conditions get difficult, the RF100mm F2.8 L MACRO IS USM lens features dust- and weather-resistant construction in the lens mount, switch panel and all rings. Sealing is applied to lens joining sections, and switch panels to help prevent water and dust from entering into the lens.