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All Ha scopes can (and need to) be tuned by altering the optical surfaces very subtly. There are three methods of doing this that I can think of, electronically (Daystar), by tilting (Coronado) or by pressure (Lunt mostly). Your scope may be a combination of those.
My 50 has a pressure tuned etalon and tilt tuned DS unit for example. The theory goes that Pressure tuning is better than tilt tuning (a bit of history - Mr Lunt designed and built Coronado then sold the company to Meade. His son Andy went on to produced a whole new range of improved solar telescopes using pressure tuned technology). Electronic tuning a la Daystar seems to be the best by far, but requires long fl scopes and can't get a whole disk view.
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