Opinions vary on which three prime lenses constitute the “Holy Trinity.” For me, it’s the 50, 85, and 600mm though I’ve only shot the 600mm a few times. For other photographers, a trio of 35, 85, and 105mm work best, and still, others are closer to my ideal with the 50mm at F-1.4 to start, a 100mm at F-2.8 in the middle, and a prime 300mm with an aperture of 4 as their choice for telephoto use.