Coronado - Filters

The SolarMax 40 was designed specifically for use on short fast refractors
under 1000mm focal length. Though small in size the 40mm filter is large
enough to resolve fine detail in surface structure and on the Sun's limb.
The SolarMax 40 will provide full disk H-Alpha views when matched with the
appropriate Blocking Filter (see "FILTERS" for BF chart) on a suitable
refractor.

The Blocking Filter is the second element in any Coronado H-Alpha system,
it is just as crucial to your safety and the system's performance as the
front element. Use the following guidelines for selecting which Blocking
Filter you need based on the focal length of the telescope being used. If
you are switching to a longer focal length telescope your SolarMax system
you can purchase blocking filters separately.

The SolarMax 60 can be used to adapt most telescopes under 3000mm to
H-Alpha observing. Our mid-sized filter, SolarMax 60, provides greater
resolution and opportunities for resolving detail at higher magnification
than the SolarMax 40. By matching the SolarMax 60 with the appropriate
Blocking Filter (see "FILTERS" for BF chart) and adaptor plate you can
easily adapt most telescopes to H-Alpha viewing.

Like the smaller 60mm filter the SolarMax 90 can be used on almost any
telescope design under 3000mm focal length. However, the larger 90mm
aperture increases resolution and allows for the user to view individual
sections of solar activity at high magnification and when viewing at full
disk the user gets the impression of curvature on the surface. The extra
resolution will provide some stunning views; you haven't seen the sun until
you have looked 'down' through a filament onto an active region. The
SolarMax 90 provides consistent and breathtaking H-Alpha views.