To celebrate founder Peter Dering’s birthday, Peak Design is taking up to 50 percent off a host of bags and accessories through May 8. The sale includes steep discounts on many of the company’s most popular backpacks and bags, as well as a couple of other items, including camera accessories. Many Verge staffers are fans of Peak Design, in part because the company is known for making durable, weatherproof products that can house a range of gadgets. Most of its bags are built to carry a lot of