Snapchat has unveiled the third generation of its camera-enabled Spectacles, which allow users to capture images and video to post to the social media site. Introducing Spectacles 3. A new way to capture your world in 3D. #SnapchatSpectacles. https://t.co/k21x6aacZs pic.twitter.com/mQVT6mVNqX — Spectacles (@Spectacles) August 13, 2019 The new Spectacles 3, costing £330, will go on…