I am not hiding that during the last days, one of my favorite subject of pondering was a 12" telescope, which is different then my previous project.
(It was a 11" F5.5 solid tube, too difficult to build and too cumbersome to carry in the Honda Civic, or other small cars)
Now it's clear, it's going to be a standard truss design DIY, the solid tube idea for larger aperture, it's not working, I accepted the fact that I should build and collimate the instrument after a car trip, this is the price to pay to use a larger instrument, just arriving at the spot 30 minutes sooner should be fine.
I wish to have very good primary mirror from a mirror maker and a nice telescope that I will take my time to build, out of wood. (thanks Augustus for the inspiration lately)
The mirror, I'll ask Mr. Fullum for that, it's going to be either F5.5 or F6, this will be decided after some time spent on AutoCAD, seeing about the eyepiece height, power, exit pupil, and the choice of the secondary mirror. According to my numbers from my previous 11" project, 12" f6 is very tempting for planetary observation, it would be a general purpose telescope for lunar and planetary observation from home (a lot of light pollution) but I want it to be good for DSOs as well, not necessarily a planet killer but very good for planets and moon. For wider field of view, lower power, I keep my 8" F5 of course.
I'll start the design soon and try to improve my listening skills according to your suggestions this time, I'll need help with the design... if you want to help me.
--> You can already give me your thoughts right now.