You cannot do anything other than HA with the Solarmax II series. The Etalon is internal and cannot be removed (it's part of the focuser even).
The Solarmax III series has all external etalons, you can take them off and use the telescope for anything (including white light, calcium, sodium, etc, even use it at night, it's a 70mm achromat good for anything).
Yes, I cannot really recommend a Solarmax II series at this point, even though its much cheaper. The focuser is terrible, and I mean terrible. The III series has everything going for it. Such a better package (all external etalons, scope can be used without them, good focuser, mounting equipment and dovetail included, etc).
Solarmax II 60 Double Stack with 10mm BF is $1500~1700 new (on sale). To upgrade the focuser, you can only use a Moonlite ($475 for the custom focuser for it) or a higher quality Helical (but that's pretty much not worth it). And you still have an internal etalon and the scope cannot be used for anything other than HA solar. So in reality, to get a SMII to even remotely be an ok instrument with a better focuser (no cheap crayford can be installed, the internal etalon is part of the focuser, it's a bad design), it will be $2~2.2k new with the Moonlite. Also, the SMII series do NOT come with mounting hardware, so you need a dovetail and/or rings to use it. It only comes with the clamshell, but no dovetail. So add another couple of bucks. Mean while, the SMIII series comes with a dual speed crayford already, and its good. The etalons are external, so you can remove them and use the scope for anything you want that a normal 70mm achromatic doublet refractor would be good for (all wavelengths of light solar, night time use, etc). It comes with dovetail and mounting hardware that has taps for adding additional mounting hardware. Real world price difference is $400 basically for the convenience of better mounting hardware, removeable etalons, etc, at $2600 new for the III version with the same blocking filter. The $400~500 difference is worth it to me.
I had a Solarmax II double stack by the way. Best thing I ever did was return it, sadly. The etalons are fine. But the design is awful for the money. The III is way, way better designed as a package.
SMII 60mm DS next to my C8. I returned the SMII within a few days. I can't recommend it at all based on design and its horrible focuser.
Edited by MalVeauX, 27 May 2019 - 11:38 AM.