View Full Version here: : Emu headstand..revisited
PaulSthcoast
31-05-2020, 07:36 PM
Hi everyone,
this image was taken around 1.00am 30-05-2020,
from my home on the South Coast NSW.
Bortle 2 sky.
It was an amazing night, with lots of dew about.
I had been experimenting for a few hours with the ZWO Asiar
and S10 mobile.
I enjoyed this shot in particular, though there was a lot taken
via trail and error.
Single shot;
Canon 1100D modded
Tamron 17mm f/2.8
Skywatcher Staradventurer
ZWO Asiair
Samsung S10
Processed via Samsung S10 Photo edit.
2nd image as a revisit.
Of processing.
Comments welcome.
Paul.
astronobob
01-06-2020, 10:41 PM
Looking rather good, Paul, How long was the exposure, ISO and F/stop ?
Good detail for a single, have you considered stacking some, would be surprised what 5-8 images stacked can reveal..
Processing ? I can only suggest some color balancing - this is what PShop Auto-color does
PaulSthcoast
03-06-2020, 11:40 AM
Bob,
Thanks for tidying up the image.
Agreed the photo shop auto balance did help.
Something I don't have.
The Tamron 17-55 mm is an aspherical lens,
Which has an open appature.
Details here.
https://tamron.com.au/our-products/sp-af17-50mm-f2-8-xr-di-ii-ld-a16
I was using various iso during the night, but from
memory it was 3200 for 3 minutes...I was in battle with dew.
Paul.
astronobob
05-06-2020, 09:13 PM
That is a bit cool paul.
hey, please dont mind me askin' - your 1st photo was taken at iso 3200 for 3 minutes, wow, the photo looks rather dark, if I dont say very dark for those settings, and i'm querying about the F/ratio your lens you mention was set at at the time of that exposure, I somehow think weather the F/ratio may have been a lot higher, like F/15 or f/20 ? ?
PaulSthcoast
05-06-2020, 10:09 PM
Hi Bob,
It's the processing that made it dark.
As mentioned I am using a mobile to alter the image.
It seems a very flexible program.
The Tameron has a set focal length of f2.8.
I did include a link for reference previously.
The sidewards image shows the dew over the lens
During another image.
Just for pure experiment, I have the first image at two extremes of processing to show variances that can be achieved.
I hope this helps ?
Paul.
astronobob
06-06-2020, 11:10 PM
I see now, thanx..
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