My favorite, at the moment, is my A7rIII with Sony FE 24-105mm F4 GM. It's always on my camera and covers the best range. When it comes to wildlife, I switch over to a Sigma 200-600mm which is amazing. I'd love the Sony 600mm but too much money. For Astro, I use the Sony FE 20mm F1.8 GM. I tried the 16mm but prefer the width of 20mm. F1.8 is great for Astro and this lens outperforms the Sigma 20mm F1.4 !