The £179 (around $225) add-on for the company’s new 15 Ultra flagship hasn’t changed too much from last year’s except for the eye-catching color. The battery is bigger at 2,000mAh, though, so it’ll keep the 15 Ultra running a little longer. The two-stage shutter button and other controls are also now joined by a thumb rest, which may look like a film advance lever but sadly doesn’t do anything other than sit there.