Canon's full-frame mirrorless camera system is only a few months old, but it's already growing. The company announced a new camera today, the full-frame EOS RP, which we covered in an extensive hands-on preview.

It also made a development announcement and showed mockups of the six RF-mount lenses, all coming in the second half of the year. They'll join the four lenses on sale now—the RF 24-105mm F4 L IS USM, RF 28-70mm F2 L USM, RF 35mm F1.8 Macro IS USM, and 50mm F1.2 L USM.

The headliners are a set of three pro-grade, f/2.8 zoom lenses—the RF 15-35mm F2.8 L IS USM, RF 24-70mm F2.8 L IS USM, and RF 70-200mm F2.8 L IS USM. All three are part of Canon's L series, and more importantly, all three incorporate image stabilization.

Canon doesn't offer optical stabilization in the most comparable lenses it sells for its SLR system, so having it in the 15-35mm and 24-70mm is a notable change. Canon has yet to release an RF-mount camera with in-body stabilization (IBIS), but has stated that it is developing the feature for future cameras.

They're joined by two versions of the same prime lens, the RF 85mm F1.2 L USM and RF 85mm F1.2 L USM DS. The DS—it stands for Defocus Smoothing—promises to draw backgrounds in a smoother manner. Canon is presumably using an internal apodization filter, similar to the Fujifilm XF 56mm F1.2 R APD and Sony FE 100mm F2.8 STF GM OSS.

Why not release just one edition of the lens, with the smoothed backgrounds? Apodization filters cut into light gathering, so it is very likely that the RF 85mm F1.2 L USM DS will act more like an f/2.8 for purposes of calculating exposure—simply put, it won't be as useful in very dim light as the standard 85mm F1.2 L USM. This is speculation on my part, but speculation based on how similar lenses work.

The final 2019 lens is an all-in-one zoom, the RF 24-240mm F4-6.3 IS USM. Given its zoom range, it's a fairly compact design. It's the only lens on the calendar that's not part of the L series, so we expect it to be priced with consumers and hobbyists in mind. But we don't expect it to have extensive weather protection or fluorine coating.

If those lenses aren't enough, remember the EOS R is able to use Canon SLR lenses via an adapter.