I am searching for a good H-alpha solar filter setup that I plan to use on my Takahashi FC-76DCU and a TSA-120. My budget is anything up to $1,500 and I prefer to buy a standalone etalon filter setup similar to the Quark as opposed to a whole separate scope (i.e. Lunt, Coronado, PST). I've seen the option offered by Baader, but was wondering if there were other standalone H-alpha solar filters besides the Quark in the under $1,500 price range. Thanks!
I assume this is for visual only?
If that's the case, I would actually not use a Quark. It works, and is excellent for it's cost, but I feel like its a lot better as an imaging device than a visual device, from a comfort factor. If you do, however, go towards a Quark, go for the Quark Chromosphere Combo version, so that you can control the FOV a lot more by providing your own powermate instead of the regular version that has the 4+x internal barlow.
Otherwise, like Bob pointed out, I would look to the stand-alone front mounted etalons. You simply won't be getting one that is 80mm aperture or more to match your scopes for your budget. Instead, you'll be looking at maybe a 60mm front mount for your budget. Unless you can find a used 80mm front mount right at your budget. Odds are not good there though, they rarely come up for sale. So more likely is going to be to find a 60mm new or used (front mounted etalon) with a blocking filter. Or getting it new (Lunt for example), in terms of your budget. If you can increase your budget a little, you may be able to squeeze in more aperture, but as aperture increases in HA the cost drastically skyrockets. A brand new 60mm front mounted Lunt etalon for example is literally right at your budget. 80mm or more quickly gets into double that price (100mm being $4.5~5k+).
For your budget, used is one way to get a lot more for your money. But, now's not a good time to buy, everyone will cling to everything until after 8/21 next month. Then maybe some will hit the for sale forums, because of the eclipse, and the very obvious solar minimum going on for the next decade, a lot of HA stuff will probably go up for sale I imagine by the end of this year.
I use a PST for my HA visual of the sun, despite having a 120mm aperture refractor with a Quark. It's just way more comfortable to look through the PST and see the detail both on surface & prominences, with lots of nice eye relief, no black outs, no tunnel vision. It's hard to look through my 120mm + Quark, the magnification is high, it needs tracking just to do visual (and of course image), and it requires really careful eye placement to get the view without black outs. So the PST is my visual grab & go and doesn't require tracking; it's a pleasure to use.