Wednesday, January 11, 2012

Orion

With the 14 now on the wedge, I decided to do some experimentation with imaging.  My polar alignment was not precise and the scope has not been trained for polar mode operation.  However, I thought I would try a few exposures to see if the wedge had mitigated the field rotation I was getting in ALT/AZ mode.  As cloud was rolling in, I didn't have much time to get pix, so the focus is very rough and processing is very basic (no darks or flats).  The Great Nebula in Orion (M42) was entangled in tree branches, but I took the following image, which is a stack of six 40-second exposures.  The Trapezium can be clearly seen in the center, and some color in the nebula itself.  Although the focus is a little off, the main thing about this image is that there is no evidence of field rotation.  I look forward to taking some longer exposure images when the weather permits.