Sony's 400mm and 600mm GM lenses weigh just 2.2 pounds

Sony announced full-frame telephoto lenses FE 400mm F4.5 GM OSS and FE 600mm F6.3 GM OSS weighing 994 g and 995 g, the lightest in their class. Prices are $2699 and $3699, preorders open, shipping from October 8.

• Weight is 994 g for 400mm and 995 g for 600mm, lighter than Nikon rivals
• Both lenses use two linear motors and support teleconverters
• Autofocus works at up to 120 fps bursts and 4K 120p video
• Prices: $2699 for 400mm F4.5 and $3699 for 600mm F6.3, shipping Oct 8