11th September 2010


10" Newtonian, 4*6 minutes
Last week I tried 20 minute exposures of M57. Results were disappointing. Faint detail in the nebula was rather blurred.
This image uses the 4 best from a batch of about 12. I suspect that any more detail in the nebula will be elusive to show.
The object is very small on the CCD chip, and this is a much enlarged sub frame.

  This shows the full width of a frame to illustrate the difficulty.