skysurfer
07-02-2018, 08:35 AM
Yesterday night it was clear and tried to capture a classic.
Not completely dark as there was a light dome in the east from Sydney, but despite that, I tried with the ED110 prime focus, with reducer f/5.6 (600mm FL).
So I could not get beyond 2 minutes to prevent overexposure.
The flats are not ideal (or I did wrong something else). I made 17 frames (then clouds moved in), stacked with Photoshop CC 2018 and divided it by a master flat. I had to adjust the histogram of the flat towards the center.
On the left there is some defocusing, I don't know why.
The light pollution is not that ugly orange anymore, due to LEDs instead of HPS lamps, which makes it easier to post process. So for me, street LEDpoles have an advantage.
The coming days I want to move further into the darker locations.
Comments welcome.
Not completely dark as there was a light dome in the east from Sydney, but despite that, I tried with the ED110 prime focus, with reducer f/5.6 (600mm FL).
So I could not get beyond 2 minutes to prevent overexposure.
The flats are not ideal (or I did wrong something else). I made 17 frames (then clouds moved in), stacked with Photoshop CC 2018 and divided it by a master flat. I had to adjust the histogram of the flat towards the center.
On the left there is some defocusing, I don't know why.
The light pollution is not that ugly orange anymore, due to LEDs instead of HPS lamps, which makes it easier to post process. So for me, street LEDpoles have an advantage.
The coming days I want to move further into the darker locations.
Comments welcome.