mfogiel
Veteran
It comes down to several factors. I try to learn the strong points of each FL, and of each lens in the group. Then, I tend to chose the lenses best suited for the particular type of shots I want to do. However, as walk around lenses, I use most often compact lenses with strong universal qualities. In 50mm I would take the Summilux 2 out most of the time, but I will swap it for the DR Summicron if I am thinking of landscape or architecture, and with the C Sonnar or Canon 50/1.2 for portraits. In 35mm I have fallen lately for the Summicron V3 for its out of focus and great grayscale rendering. I will swap it for the 35/2.8 Summaron for landscape or architecture and with 35/1.2 Nokton for the low light. Both the Summicron and the Nokton are also gret for portraits, but the rendering is distinctly different. In 28mm the Summicron is my universal lens, but I will swap it with the 1.9 ultron for landscape. In 21mm I like the rendering of Super Angulon 3.4, but I will often swap it wih the C Zeiss because of AE compatibility and more compact dimensions. The Zeiss ZM line, C Sonnar apart, is great for a more biting, higher contrast look, and generally for colour. I seldom use 90mm lenses, and in this FL I use the V1 and the last Elmarit together with the ZF Planar 85 and Makro Planar 100, according to circumstances.