The NL Filter is your friend

I'm not too familiar with Photoshop, never having used it.  I suspect that it has rather more advanced filtering than the Gimp, my usual pixel-editing program.  In any case, for those doing editing work that involves clean-up (as my latest moon shots have required), the NL filter is a huge win for you.  The link has the documentation.

Over-developed Attempts with TC-301

I've made my first attempts with the TC-301.  The results are a bit over-developed, but as a start it's probably not too bad:

400 (800) mm f/5.6 @ f/8(16), 1/100s, ISO 200