Klaus-Peter wrote : > a fine 10" f/6 newtonian ... > and sometimes I had the impression to glimpse > the cassini division already A _glimpse_ ? I have _photographed_ (ahem, CCDgraphed) the Cassini and white oval this year with a sub 8" instrument (NOT an APO reafractor!). Can't be that hard to see in a good 10". Bratislav