[ausastronomer (John Bambury)]

Originally Posted by gregbradley

Thanks Don.

That would seem to need a very large dob to see those faint stars.

Greg.

Hi Greg,

You need reasonable aperture over 10" and obviously the bigger the better, but at least as important is good seeing and a well cooled and collimated telescope.

I've done down to I in my 14" and 18" scopes several times, and reasonably common in the 25" Obsession. One night at Coona under superb conditions with the 25" and a 12mm Nagler, I had "stars everywhere". I am only familiar with them down to "I" and had no finder chart, so not sure what was what, but easily the best view I have ever had of the trap.

Cheers
John B