On safari at a private game reserve in South Africa. We were allowed to get of jeep and walk on foot to see the Cheetah's. I had my 3kg sigma 150-600mm lens but no tripod so had to try and make a human tripod. This picture is using the lens on the maximum length at 600 on an aps-c body. Quite happy it didn't loose too much sharpness at this focal length. I am a complete beginner and hobbyist so be grateful to hear your feedback. Thanks