Meade Instruments Coronado SolarMax Series - Manual (Page 17)

Double Stacking - This greatly increases contrast by narrowing the bandpass to <0.5Å
and gives a spectacular 3D effect showing increased surface detail. The SolarMax 90 is
double stacked by installing a matched 60mm etalon inside the OTA or attaching a second
matched 90mm external etalon & T-Max. Double stacking filters must be matched to the
primary etalon with blocking filter. The SolarMax 90 telescope can be ordered this way or
later upgraded by Coronado. Contact Coronado for details.
Å/°C