Lately I'm thinking of adding 1 or 2 TMB mono's for DSO work. Most of you know that I have terrible skies (nelm usually 4.8~4.9) for galaxy hunting so every gain in contrast and transmission and .... is very useful.
Anyway, APM in Germany still has the 9 and 7mm units in stock and since I've have been working my entire summer vacation I'm going to give myself a little treat
. So, would it be reasonable to spend 150€ on a tiny little ep when I can get a very good ortho for much less?