Good objective
I have always bought variable focal lengths (70-200, 18-300 and 50-500). I was always dissatisfied with the 50 and 70mm. It is better to have several lenses (whatever it costs) with targeted focal lengths than lenses with wide focal lengths for which the apertures are often too small. I have a horror of using ISO. I tested today a good forty close-up subjects and I was surprised by the rendering. I recommend it for portraits. Be careful to aim well because of the background blur (it's a very precise lens).