First and foremost, candid portraits often require one of two things: either a lot of trust in the photographer or a really stealthy photographer that absolutely cannot be seen or heard. This is what many aspire to be: the fly on the wall.
The Zeiss Loxia 25mm f2. 4 is a lens that when you look at it, it seems to be very much like most of the other Loxia lenses on the market. And in accordance to design standards that just makes sense.
The 24mm lens: it's a classic focal length that for a very long time has been close to the hearts of many photographers. When I say many photographers, I'm really not kidding. There are great reasons why it's the wide angle of a 24-70mm lens and there are great 24mm lenses on the market that are fairly compact and high quality.
You've got the same fear that so many others have had: being way too afraid to take photos of people candidly on the street. I mean, what if they get angry and blow up on you? The good news is that it's not the end of the world and what you'll realize is that that moment is so small and fleeting that it won't really matter.
I like to work a scene when I'm out shooting the streets. I find a vibe or background or light or whatever that exudes life, and I drain every last drop of potential the hell out of it. In attempting to capture a split-second candid moment, it's absolutely critical that I use a camera that's quick, easy and inconspicuous.