I’ve been using an Elmar 90mm 1:4 on my LTM and it’s just too slow a lens for everyday use. I was hoping that the Summicron would be faster and give good performance when opened up I was reading that the collapsible Summicron 1:2 has marginal performance at f/2. Getting a rigid Summicron seems impossibly expensive, perhaps even overkill. Can someone post examples of the collapsible Summicron’s performance at f/2? Share your opinions on this lens?