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Old 14-03-2012, 08:57 AM
Poita (Peter)
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Join Date: Jun 2011
Location: NSW Country
Posts: 3,586
The solar scopes have filters that go down to <1 angstrom , typically 0.7, 0.5 or 0.3 Angstroms.

The standard Ha filters are nowhere near the same league
e.g. a 12nm one = 120 Angstroms

Also, the solar film effectively blocks nearly all the Ha light anyway (I think?!?).

To get results like those with solar scopes, you need an expensive <1 Angstrom Ha filter, and an Energy Rejection filter that lets Ha through.
These cost the same or more than a dedicated scope, there is no cheap way unfortunately.

The cheapest option is to modify a PST to work with a larger aperture scope, but you are still looking at over a grand by the time you are done.
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