Figure 2From: Towards digital photon counting cameras for single-molecule optical nanoscopy Signal-to-noise ratio: Plot showing signal-to-noise ratios (SNR) of CCD, EMCCD, sCMOS and SPAD array cameras. Excess noise in EMCCDs clearly affected their SNR. The effect of read-out noise is minimal at higher numbers of incident photons, while the multiplication of shot noise in the signal in the case of EMCCD, diminished its SNR.Back to article page