Is the olympus m zuiko 45mm f 1 8 good in low light?

Yes, for its size and price. The 45mm f/1.8 is a fast prime, and primes gather far more light than any kit zoom. On Micro Four Thirds it frames like a 90mm, and f/1.8 gives shallow depth of field there, so it also suits portraits in dim rooms. It has no stabilisation, so indoors you'll need a faster shutter speed to keep shots sharp.

If you shoot in very dark places often, the Olympus M.Zuiko 45mm f/1.2 PRO keeps the same focal length with a wider aperture, and it's weather-sealed. It's the bigger step up, so I'd only go there if the f/1.8 leaves you short of light.

For the reasoning behind fast primes, see Primes or zooms.

Written by Claude from this site's pages.