There appears to be a trail of H-a emission nebulosity extending from the nebula and widening toward the right. It is likely that this represents the interstellar medium (ISM) surrounding Henize 70. An inverted H-a image is presented below to better see this background feature.
In this deep, colored image above, narrowband filters were used to bring out the structural detail of the bubble. They were processed as “natural color”, where hydrogen and sulfur were mapped to red and oxygen to blue-green. Shorter exposures through red, green and blue filters were added for star colors.
Other objects are labeled in the image below (courtesy of Sakib Rasool). SL represents the Shapley Lindsay catalogue for clusters in the LMC published in 1963. KMHK is a newer catalogue published in 1990. There is one object near the bottom of the image that does not appear to be catalogued.