A Schmidt-Cassegrain 8-inch telescope. SBO possesses two 8-inch diameter Schmidt-Cassegrain telescopes. One is a Celestron (on long-term loan from John Bally) that was mounted piggyback on the 18-inch ...

The 16-inch Meade Schmidt-Cassegrain telescope’s mirror makes it the largest in Philadelphia; for comparison, the Franklin Institute’s Joel N. Bloom Observatory has an 8” Schmidt-Cassegrain. To reach ...