The above image/mosaic was captured from the light polluted skies of Sydney.

The light dome of the city becomes obvious toward bottom right of the image

No effort was made to correct the gradient from Sydney's light dome.

Canon 60Da, Sigma 105mm Art @ F2.0 2x 30 second exposures ISO 1600 each frame

One ponders the results from a dark site !!

Can you see all 26 grey scales above?