Solar H-alpha Bandwidth

In other threads, the 1.5-Angstrom bandwidth solar H-alpha filter (from Thousand Oaks) was described as a "prominence-only" filter, unable to see many of the surface details. Obviously, its bandwidth is too large. However, is there really a visual advantage in going from 0.9 to 0.7 to 0.5 Angstroms?

How does the new Thousand Oaks filter (rated at a bandwidth of 0.9 Angstroms) on a 4-5" refractor compare to the PST (rated at <1.0 Angstroms)?

Allen

Allen,

As you narrow the bandwidth more surface detail appears, but less prominence detail. IMO, a good all-purpose bandwidth is around .8 to .6 nm., where you can see surface features and proms.

J Adams