Still looking for a A.O. 1212 20X phase objective. What I have is the 1223 Planachro 20X longer working distance dark phase in excellent condition. Corrected for 1MM glass (according to mission site) so would be better suited to a Biostar, metallurgical etc? Works fine on a Microstar by flipping the slide but it's an irritant.
Anyone with a 1212 that would like to work a trade or has one lurking in your cabinet you'd be willing to sell? I'll post the 1223 when I manage to buy, beg, borrow, steal, inherit or otherwise acquire the 1212. Last piece of the puzzle for my Microstar.
Cheers, Al.