I was cleaning up backup Hard Drives and I found this panorama of Cormorants. This was taken last June at the Edwin B. Forsythe National Wildlife Refuge in Oceanville, NJ. I was using a Tamron 150-600mm lens @ 600mm with a Sigma 2X teleconverter for a focal length of 1200mm. The Panorama is made with 9 horizontal images, aligned & blended in Photoshop. Even with the Sigma 2X teleconverter I was using autofocus with the Canon R. For some reason the Canon R does not see the Sigma 2X Teleconverter and still thinks the lens with the teleconverter is a f/6.3 aperture. Even the Adobe Camera Raw info data states it is f/6.2 (not even the f/6.3) lens.