Originally Posted by Darthfeeble
I've not tried focus peaking in low light, I'll try it and report back.
Focus peaking utility in low light is highly variable. It depends on
- The contrast of the intended focus region has the largest impact on focus peaking utility. High contrast in low light can work better than low contrast in brighter light.
- The sensitivity of the AF system which is expressed in EV (smaller and negative values are better. In low light the EVF display have less detail because the overall signal-to-noise .ratio is lower.
- The effectiveness of the in-camera AF firmware
- For EVF finders, the inherent contrast of the finder display.
- Phase-detection AF works best with fast lenses. Contrast detection works best in low light.(link1, link2).
- Some cameras a small number of central AF detection sites with higher sensitivity.
It took me a while to experiment with each new camera to maximize focus peaking AF performance in low light.