KEY TECH­NIQUE

Sky at Night Magazine - - THE SKY GUIDE -

High-res­o­lu­tion imag­ing re­quires your tele­scope to be prop­erly cooled and its op­tics to be ac­cu­rately col­li­mated. In ad­di­tion, sharp fo­cus is es­sen­tial too. How­ever, even if you get all of th­ese fac­tors cor­rect, your re­sults can still be thwarted by at­mo­spheric see­ing. As­sess­ing the na­ture of the pre­vail­ing see­ing and un­der­stand­ing fac­tors that af­fect it is as much a part of high-res­o­lu­tion imag­ing as any of the phys­i­cal in­stru­ment set­tings. The sub­jec­tive as­sess­ment that comes with prac­tice is im­por­tant too, as con­di­tions can change quickly.

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