Tracking times

One of the most critical factors in astrophotography is how long your mount can track a target without manifest elongation of the stars (of course, how much elongation is too much is often a bit subjective). With unguided tracking exposure times are bound to be shorter than if you autoguide and with an altazimuth mount … Continue reading Tracking times

Field Rotation … aka The Bogeyman

Field rotation can really be considered the bogeyman of DSO astrophotography with altazimuth mounts, indeed all those who object to the possibility of doing any serious AP with AltAz mounts invariably quote it as THE main obstacle. So, what is it and why is it so bad for altazimuth astrophotography? It has been explained a … Continue reading Field Rotation … aka The Bogeyman