Bertrand LAVILLE has suspected it once with a 25" Obsession (http://www.deepsky-drawings.com/abell-09/dsdlang/en) : the best combination was 519x without filter. BUT it needs to be confirmed as...
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Bertrand LAVILLE has suspected it once with a 25" Obsession (http://www.deepsky-drawings.com/abell-09/dsdlang/en) : the best combination was 519x without filter. BUT it needs to be confirmed as...