Turbulence June 16, 2015 Buy this photo FacebookTwitterPinterestTumblremail Relatively rare phenomenon of mammatus clouds formation sweeping across the sky. Exif / Equipment Nikon D800 & Samyang 14mm f/2.8 IF ED UMC AE Aspherical ISO 100, 1/80 sec @ 14 mm, f/11, Vertical panorama « Back to postlist Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website What is the letter after c? (Required)