I spent most of a day trying to stay far enough away from this buck to keep it in the frame. What a great problem to deal with.
Finding the ideal clearings in the woods was an even more significant challenge. Foreground obstructions, background distractions, and mottled light problems were high on the day's list of photography challenges.
Challenge reducing was the impressive performance of the Canon EOS R3 and RF 600mm F4 L IS USM Lens, immediately snapping focus on the eye I was looking at, capturing the ideal moments in time. Being able to position a focus point anywhere in the entire frame instantly is incredible.
This buck was in the woods, and the woods are full of distracting lines. As is often the case, the Canon RF 600mm F4 L IS USM Lens blurred the background distractions away. Few lenses, primarily only the 400 f/2.8 and 800mm f/5.6 options, can compete with 600mm f/4 background blur.
As mentioned, foreground obstructions were on the challenge list this day, and a downside to using the 600mm focal length in the woods is finding a clear path to the subject. The key is to predict where the animal will go (or where you most want it to go) and be in position when it arrives.
We typically want wildlife subjects to appear large. Especially when photographing whitetail deer, I frequently shoot from close to the ground as long as the surroundings provide a good line of sight. This camera position increases the likelihood of a catchlight in the animal's eye, adding life to the animal.