Coronado Doppler tuning unit for SM90
Item No. 729-50090
Free Shipping (within the 48 contiguous US States only)
Manuf. No. Coronado TMAX90
Special Order Item
All SolarMax series filters are sold in sets. The front mounted SolarMax and rear blocking filter. Almost all telescopes will require an adaptor plate in order to attach the SolarMax, these are available from Coronado or through your dealer. The SolarMax includes a T-Max de-tuning device. Some events on the Sun,- notably active flares and coronal mass ejections (CMEs), are extremely fast moving. If such features occur on the disc of the Sun, their high velocity towards the observer results in their wavelength being Doppler shifted shorter than Ha. If the velocity is high enough, this wavelength could be outside the passband of the filter and the feature would not be observable. The T-Max allows the user to de-tune the SolarMax slightly to bring such phenomena into better visibility.