Here are my top picks for the R6 II based on different photography needs:

For an everyday versatile zoom, the Canon RF 24-70mm f/2.8L IS USM is hard to beat. It offers a useful focal range, fast f/2.8 aperture throughout, and excellent image stabilization. The optics are top-notch with sharp results, though the edges are a bit softer. It's not cheap, but a worthwhile investment.

If you shoot sports, wildlife or events, the Canon RF 70-200mm f/2.8L IS USM is an outstanding telephoto zoom. The AF speed is blistering fast, and the triple-mode 5-stop IS works great for both stills and video. It's smaller and lighter than EF versions too.

For ultimate low-light performance and subject isolation, the Canon RF 50mm f/1.2L USM prime is simply phenomenal. The rendering is gorgeous with creamy bokeh. Just be prepared for the high price and hefty size.

Landscape and architecture shooters should consider the Canon RF 15-35mm f/2.8L IS USM ultra-wide zoom. The perspective distortion at 15mm is dramatic, and corner-to-corner sharpness is good (but not perfect). Having a removable hood for filters is very convenient.

For even more reach than the 70-200mm, the Canon RF 100-500mm f/4.5-7.1L IS USM is an excellent choice, especially paired with the R6 II's great AF system. The long focal length does come with a narrower max aperture though.

If you're into macro, the Canon RF 100mm f/2.8L Macro IS USM goes beyond 1:1 with an impressive 1.4x magnification. Hybrid IS and the SA control ring for soft focus effects are nice bonuses. Just be aware of the larger size compared to EF macro lenses.

For incredible portraits, the Canon RF 85mm f/1.2L USM is possibly the best lens available, period. The sharpness and bokeh wide open at f/1.2 are breathtaking. It's very pricey and bulky, but if you make money shooting portraits, it could be justified.

Street photographers should give the Canon RF 35mm f/1.8 IS Macro STM a serious look. It's small, lightweight, affordable and the close-focusing is very handy. The f/1.8 aperture provides decent low-light ability and background blur for a 35mm lens.

Finally, if you want to capture expansive architecture or interiors, the new Canon RF 10-20mm f/4L IS STM zoom gets you super wide. Optical performance appears to be very good, and the lightweight design works great on gimbals or handheld for video.

 Canon EOS R6 Mark II is a versatile full-frame mirrorless camera that supports a wide range of lenses, making it suitable for various photography styles, including portraits, landscapes, wildlife, and more. 

Prime Lenses

1. Canon RF 50mm f/1.2L USM

   • Type: Standard Prime
   • Description: An exceptionally sharp and bright lens ideal for portraits, low-light situations, and general photography.

2. Canon RF 85mm f/1.2L USM

   • Type: Telephoto Prime
   • Description: Perfect for portrait photography with excellent bokeh and sharpness, offering stunning subject isolation.

3. Canon RF 35mm f/1.8 MACRO IS STM

   • Type: Wide Prime
   • Description: A versatile lens that can be used for street photography and macro photography with a close focusing distance.

4. Canon RF 24mm f/1.8 MACRO IS STM

   • Type: Wide Prime
   • Description: A compact and lightweight lens with macro capabilities, great for landscape and close-up shots.

Zoom Lenses

1. Canon RF 24-70mm f/2.8L IS USM

   • Type: Standard Zoom
   • Description: A versatile zoom lens with a constant f/2.8 aperture, suitable for a range of photography styles from portraits to landscapes.

2. Canon RF 70-200mm f/2.8L IS USM

   • Type: Telephoto Zoom
   • Description: Ideal for sports and wildlife photography, this lens is compact for its focal range and delivers superb image quality.

3. Canon RF 15-35mm f/2.8L IS USM

   • Type: Wide Zoom
   • Description: This ultra-wide zoom lens is great for landscapes, architecture, and astrophotography, providing sharp images and a fast aperture.

4. Canon RF 24-105mm f/4L IS USM

   • Type: Standard Zoom
   • Description: A good all-around lens, excellent for travel and day-to-day photography, with a versatile zoom range and decent low-light capability.

Specialty Lenses

1. Canon RF 100mm f/2.8L MACRO IS USM

   • Type: Macro Lens
   • Description: Excellent for close-up photography, this macro lens provides a 1.4x magnification and offers stunning details. 

Canon EOS R6 Mark II is a versatile mirrorless camera that works well with a variety of lenses. Here are two best-selling prime lenses and two best-selling zoom lenses that are great choices. These lenses complement Canon EOS R6 Mark II well and are popular choices for photographers looking to expand their lens collections.

Best-Selling Prime Lenses

1. Canon RF 50mm f/1.2L USM Description: This lens is known for its exceptional sharpness, beautiful bokeh, and excellent low-light performance. The fast f/1.2 aperture makes it ideal for portrait photography, as well as for capturing stunning images in various lighting conditions.

2. Canon RF 85mm f/1.2L USM Description: A favorite among portrait photographers, this lens offers stunning detail and a creamy bokeh. The f/1.2 aperture allows for exceptional low-light performance and helps create a shallow depth of field, making subjects stand out beautifully.

Best-Selling Zoom Lenses

1. Canon RF 24-70mm f/2.8L IS USM Description: This is a versatile standard zoom lens that covers a popular focal range for various types of photography, including landscapes, portraits, and events. The f/2.8 constant aperture and image stabilization make it a great option for shooting in different lighting conditions.

2. Canon RF 70-200mm f/2.8L IS USM Description: This telephoto zoom lens is perfect for portraits, wildlife, and events. With its compact design, fast f/2.8 aperture, and effective image stabilization, it delivers exceptional image quality and performance across its zoom range.

Quickly jumping in here before I head out for a shoot. Ive been living with the R6 II for a year now and honestly, the lens that surprised me most was the Canon RF 14-35mm f/4L IS USM. I debated between it and the f/2.8 version for months, but for landscapes, you're usually stopped down anyway. That extra 1mm on the wide end is actually super useful for wide vistas. Its been my favorite for travel since its so light and portable... I got mine for about $1,200 on sale and it works well for everything from cliffsides to tight interiors. Regarding wildlife, the Canon RF 100-500mm f/4.5-7.1L IS USM is just incredible. I was worried about that f/7.1 aperture at first, ngl, but the R6 II sensor is so good with noise that it doesnt really matter. I spent a whole morning tracking hawks last fall and the hit rate was just insane. If you can swing the $2,800 price tag, its a beast. Honestly, very satisfied with how my kit has turned out. No complaints at all with these two in the bag.

The new released RF 35mm f/1.4 VCM lens is a great wide-angle and street lens for R6 Mark II.

In my opinion, the best zoom lens for Canon EOS R6 Mark II is Canon RF 24-70mm f/2.8L IS USM and the best prime is Canon RF 50mm f/1.2L USM. 

These lenses provide a solid balance of versatility and image quality, making them excellent choices for your Canon EOS R6 Mark II.

Been using this for years, no complaints

1. Canon RF 24-105mm F2.8 L IS USM Z
The ultimate all-in-one lens. It covers wide-angle to portrait-length with a constant F2.8 aperture, offering exceptional low-light performance and beautiful background blur. Combined with the camera's in-body stabilization, it achieves up to 8 stops of shake correction, making it perfect for events, travel, and professional video work.

2. Canon RF 28-70mm F2.8 IS STM
A perfect balance of quality and portability. This lens provides a constant F2.8 aperture in a compact, lightweight design, making it ideal for everyday carry, street photography, and travel. It delivers excellent image quality and features built-in optical stabilization, offering great value as a versatile, go-anywhere standard zoom.

The 24-70mm and 70-200mm f/2.8 lenses are excellent choices for versatile photography. Consider adding a 50mm f/1.8 for low-light situations and portrait work. The 24-70mm, in particular, serves as an ideal walk-around lens for everyday shooting, offering a practical focal range for various scenarios.