With more than 40 years of aviation photography experience, jim_koepnick knows a thing or two about shooting an air show. With the Sigma 300-600mm F4 DG OS | Sports, he may have found his favorite telephoto lens ever. Faster shutter speeds, less noise, and flexibility to photograph high-speed aircraft even when the light starts to dim, all thanks to its F4 constant aperture. Link in our bio for more images from EAA #AirVenture and to learn more about this one-of-a-kind lens. #Sigma #Sigma300600mmSports #photography #aviation #aviationphotography #airshow #airshowphotography #OSH26