Hi Catherine,
If you can afford it Ha is the way to go. A PST even at 1 angstrom will be a lot more interesting than a white light filter for your Mak. However if you can stretch your budget to a filter or scope that will do .7 or .5 that will be even better. I love my lunt 50mm Ha that goes on an ed 80 and have the benefit of being able to use the scope for other things (not that I do...) but setting up a dedicated solar scope is quicker and they are more compact and transportable.
The great thing about Ha solar viewing is that you can keep observing the sun all day and it constantly changes.
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