Re: What Zeiss lenses have the most Zeiss "magic"?
One of my favorite all-time lenses is the ZE 35/1.4. I had an absolutely stellar copy that had no hint of fringing and was just amazing for rendering. It felt off balance, due to its weight, on mirrorless but still produced great results there.
I was also quite keen on the Contax 85/1.4, especially for BW images…often magical.
In the Sony lineup, the ZA 50/1.4 was not stellar in AF speed, but the lush images it produced were really special. Even though I have and love the 1.2GM, I have often pondered buying the ZA again, for some subjects. You can never have too many 50s!