enable mot number calculation for multiple frames

lib/imaging.py

@@ -163,7 +163,7 @@ class FluorescenceData(ImagingData):
                 self.config["gain"], # dB
                 self.config["exposure_time"],
                 (0.0127**2 * np.pi) / (4 * np.pi * 0.125**2),
-                62e6 * 2 * np.pi,
+                50e6 * 2 * np.pi,
                 0.1
             )
             sx, sy = fit_gaussian(array, _dA)