LAKE SUCCESS, N.Y., May 25, 2011 -- Canon U.S.A., Inc. today announced updated 2011 availability dates for five of its EF lenses.

• Canon EF 8-15mm f/4L Fisheye USM: late July

• Canon EF 300mm f/2.8L IS II USM: late August

• Canon EF 400mm f/2.8L IS II USM: late August

• Canon EF 500mm F4L IS II USM: December

• Canon EF 600mm F4L IS II USM: December

Canon EF 8-15mm f/4L Fisheye USM lens

With its unique focal length range, the EF 8-15mm f/4L USM is the world's widest fisheye zoom lens. It delivers 180-degree diagonal angle of view images for all EOS SLR cameras with imaging formats ranging from full-frame to APS-C, and provides 180-degree circular fisheye images for full-frame EOS models. Professional photographers and cinematographers will revel in the unique perspectives afforded to them through this lens, particularly when coupled with the highly popular full-frame EOS 5D Mark II DSLR camera.

The Canon EF 8-15mm f/4L Fisheye USM lens is expected to be available in late July for an estimated retail price of $1,399.

Canon EF 300mm f/2.8L IS II USM lens

The Canon EF 300mm f/2.8L IS II USM is the sixth generation of a venerable family of Canon 300mm f/2.8 lenses that began in 1974, and have become famous for their exceptional sharpness, contrast and color fidelity. Ideal for a wide range of applications ranging from professional photojournalism and sports photography to nature and wildlife, Canon's 300mm f/2.8 lenses have always led the industry with new technical advances in every generation. The EF 300mm f/2.8L IS II USM lens carries on this tradition with improved image quality, lighter weight, improved Image Stabilization and enhanced durability, making it a great option for handheld work in the field. The optical formula of the new lens has been upgraded with the inclusion of two fluorite lens elements for improved image quality and reduced chromatic aberration. Canon has reduced the overall weight of the lens by 8 percent to 82.9 oz., making it the lightest weight lens in the Canon EF 300mm f/2.8 series.

The Canon EF 300mm f/2.8L IS USM lens is expected to be available in late August for an estimated retail price of $6,599.

Canon EF 400mm f/2.8L IS II USM lens

Quintessential for many sports assignments including baseball, football, soccer and golf, Canon's professional 400mm f/2.8 lenses provide the light-gathering capability and long telephoto reach that photographers need to freeze the action and fill the frame. The Canon EF 400mm f/2.8L IS II USM is the fifth generation in Canon's 400mm f/2.8 series and the successor to the current EF 400mm introduced in 1999. The new lens has been engineered for the ultimate in optical performance through the use of two fluorite lens elements for improved quality and reduced chromatic aberration. Canon has reduced the overall weight of the lens by a substantial 28 percent from 189.4 oz to 135.8 oz, making it Canon's lightest weight 400mm f/2.8 lens ever.

The Canon EF 400mm f/2.8L IS USM lens is expected to be available in late August for an estimated retail price of $10,499.

Canon EF 500mm f/4L IS II USM Lens for Sports and Nature Photography

The Canon EF 500mm f/4L IS II USM offers professional photographers a lighter weight option for those situations that require a long focal length with improved image quality and enhanced durability over its predecessor. Great for a wide range of applications, the EF 500mm f/4L IS II USM lens is ideal for professional photojournalism, sports photography and nature and wildlife photography. The optical formula of the new lens has been enhanced to include two fluorite lens elements for improved image quality and reduced chromatic aberration. Canon has reduced the overall weight of the lens by 18 percent from 136.5 oz to 112.5 oz.

The Canon EF 500mm f/4L IS II USM lens is expected to be available in December for an estimated retail price of $9,499.

Canon EF 600mm f/4L IS II USM Lens for Wildlife and Photojournalism

The Canon EF 600mm f/4L IS II USM is the successor to the current EF 600mm IS lens first introduced in 1999. This new lens has been engineered for outstanding optical performance and durability and includes two new fluorite lens elements for improved quality and reduced chromatic aberration. Helping photographers in the field, Canon has reduced the overall weight of the lens by a substantial 27 percent from 189.1 oz to 138.3 oz.

The Canon EF 600mm f/4L IS II USM lens is expected to be available in December for an estimated retail price of $11,999.