Is the leica noctilux m 75mm f 1 25 asph good in low light?

The site doesn't have a low-light test for this lens, so I can't give you a verdict on its results. What I can say is that its f/1.2 maximum aperture is very wide, and a wide aperture is one of the main ways to gather light in dim scenes. It's also manual focus and not stabilised, so in low light you'll be working with a shallow focus zone and a slow handheld shutter.

The bigger factor is the sensor. On what a bigger sensor buys you, full frame gives about a stop of low-light advantage over APS-C. This lens is made for full frame, so it's a good match for dim work. Cameras it fits include the Leica M11, the Leica M10, and the Leica M (Typ 240). For the full lens history, see the Leica Noctilux-M 75mm f/1.25 ASPH page.

Written by Claude from this site's pages.