Deep sky astrophotography rely on very long exposure and motorized tripod in order to take into account the Earth rotation. You can probably put your instrument on a balloon (... can you ? telescopes are heavy and voluminous !), but then you'll need to track the position of the balloon so that the instrument can still point in the right direction. Wind is chaotic, so it's probably a nightmare to compensate.
Balloon-Borne SuperBIT Telescope Releases 1st Research Images
> To achieve high-precision measurements from a balloon-borne environment, the SuperBIT gondola – at roughly 3500 lbs – stabilizes its telescope to sub-arcsecond precision (akin to a three degree-of-freedom Steadicam) while sophisticated optics further stabilize the SuperBIT camera to < 50 milliarcseconds.
Amazing.
At current prices, it might be simpler/easier to send it up as a satellite. IIRC, it'd be less than $10k for a 2lb telescope.