This is from my archives.
ISO 400, 800mm, 1/800, f5.6, handheld, full frame image.
While learning photography using film rolls, the rule of the thumb was that the shutter speed should be 1/focal length to ensure a sharp image while handholding. These days with the use of Image Stabilisation, we often go below that shutter speed. However, in this image, I had stuck to the rule.