Combination of 20, 3 minute exposures.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Abell 2 is one of the "easier" Abell planetaries. Located in Cassiopea, the published magnitude is quoted as 14.1 and the size is about 0.6 arc minutes.