If you want picture quality, better than Zeiss 55mm. Great lens design! Mine has focus noise, but mostly you don't notice it.
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review
Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002
78 Review
New Nikon 18-105mm Vibration Reduction 📷 Zoom Lens with Auto Focus for Nikon DSLRs
104 Review
Nikon 50mm f/1.8D Lens: Perfect for Nikon DSLR Cameras!
97 Review