Posts Made By: Ron Rogers

All fine yet very similar, but improved, instruments over the years offered by Al Nagler at Televue; but can anyone provide a more comprehensive reference or offer a detailed comparison of imporvements, including glass types, if possible, for: Renaissance, Genesis, Genesis SDF, TV101, NP 101, NP 101 is ? Thanks.

Is anyone familiar with a list, or observing guidebook that emphasizes multiple and especially mixed deep sky objects like both a globular and a planetary visible in amateur size telescopes within the same 1 degree FOV ? I recall recently coming across a brief descriptive review of such a book, yet I cannot remember the exact title, or author, nor the magazine or website source. Is there such a book, or list?