My friend and I are preparing for solar observation of the Mercury transit later this year, and now I'm working on a backup plan. Presently, we both have Equatorial mounts. He has a small 4"-or-so reflector with a broadband solar filter. I have a Lunt LS60. We plan to set up the night before, gain accurate polar alignment, and proceed to image the transit in the morning (I'll figure out the 'where' later! hah)
Our backup plan, however, involves driving at the last minute to find a clear site with view of the sun. This makes it so my Nexstar SE Mount (Alt/AZ) is far easier to set up and accurately track the sun for the duration of the transit.
So, my question -- what sort of adapters/plates/mounts/etc would be required to mount both the 4" reflector and my Lunt LS60 to the Nexstar SE Mount, and is it even worth it (vs a very rough polar align and the GEM mounts). If I need to calculate weight in order to make a useful determination, let me know and I'll get my friend to weigh his equipment (He's imaging with a DSLR, I'll be imaging with an ASI174).
I am also reading about a process that involves dangling a string, determining the angle of the shadow, and knowledge of the Sun's azimuth to obtain polar alignment during daylight, but so far I've only read information and it doesn't quite click yet -- I'll search for videos that explain this concept soon. My guess is we'd get superior imaging if we use the GEM mounts w/ accurate polar alignment, but I'm not sure.
Any advice at all is appreciated! Thanks!