The reach up to 600mm makes a noticeable difference when photographing creatures that would otherwise appear tiny in the frame.
Handling took a little adjustment because of the weight, especially during longer outings. I find that supporting the lens properly makes extended sessions much easier, and the tripod collar comes in handy when I want a more stable setup. For handheld shots, I pay more attention to my stance and shutter speed, particularly at the longer focal lengths.
Sharpness has been pleasing in my experience, with plenty of detail in feathers, fur, and distant subjects when I use sensible camera settings. I appreciate being able to crop some photographs without losing as much fine detail as I would with a shorter lens. Results depend on light and technique, but the lens has delivered plenty of keepers for my usual outdoor subjects.
The focusing performance has been dependable for birds in flight and animals moving through open spaces. Fast subjects still take anticipation and good timing, but the lens responds well when I keep my subject within the focusing area. I also like having the option to adjust my approach for stationary wildlife instead of relying on one setup for every situation.
Build quality gives me confidence when spending a full day outdoors. The controls feel purposeful, and the zoom and focus rings are easy to distinguish by touch. I also appreciate the practical design of the barrel and the added reassurance of weather-resistant construction when conditions become less predictable. I still take care to protect my gear in heavy rain or dusty environments.
Optical stabilization has been useful when I need to shoot without a tripod, particularly while photographing wildlife from trails or observation points. It helps reduce the effect of hand movement, although I still use suitable shutter speeds for subjects that move quickly. Being able to make small adjustments without constantly repositioning my feet makes field photography more comfortable.
For sports and outdoor events, the broad zoom range saves me from changing lenses whenever the action shifts farther away. At the shorter end, I can include more of the surroundings, then zoom in when a player or animal moves into the distance. The maximum aperture does limit flexibility in dim conditions, so I plan my settings carefully when daylight begins to fade.
What stands out most is how much photographic flexibility I gain from one lens. It is not light enough to forget about its weight, and it takes some practice to handle well for extended periods, but the reach, useful stabilization, dependable focusing, and pleasing detail make those trade-offs reasonable for my needs. I am very happy with how it has expanded the subjects I can photograph with my Sony camera.