M13 – Hercules Clusterby Urban Astronomerin Uncategorizedon Posted on August 4, 2016August 4, 2016 Short and sweet while waiting for M27 to transit. 14 x 2min EdgeHD 8″ QHY 8L 0.7x Focal Reducer Hutech IDAS-LPS light pollution filter (with diminishing returns now that wideband LED street lamps are becoming popular)