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October 8, 2007

Copernicus NE ejecta


Subject: moon

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Hi all,

I’m now sharing with you some very first lunar shots grabbed on early
August with a new camera and processed throughout a new tecnique. Both
the 2 novelties are well promising indeed!

Basically, the camera is powered with the Sony ExView ICX285 mono sensor
which allows sensitivity as bigger as twice at parity of FL than ICX205
sensor do. The wider pixel size also helps in getting a lower image
scale and a wider FOV, so any short spell of steadyness is better used.

The new processing tecnique consists of a “deconvolved drizzle”
performed under Iris and Astroart softwares. The drizzle is the best way
of upscaling downsampled images and it works great with a factor 2 only.
Once 2X drizzled through the Iris, the final result is deconvolved in
Astroart through the Richardson Lucy algorytm and scaled down to 0.75X +
high pass filter to increase sharpeness.
I learned this tecnique over the last summer when processing binned 2X
deep sky shots grabbed with the same camera.
That means we sometime need to open our minds toward new experiences to
learn more! ;-)

I start with this very high sun shot displaying the nice panorama NEward
of Copernicus. Although the image is very wide (3 Mb!), maybe a reduced
view could help in better enjoying Copernicus blankets.
Seeing was mainly poor with some rare decent spells only, so I went to
enhance the mid frequencies much more than high frequencies.

http://www.lazzarotti-hires.com/images/moon/pytheas-lambert-timocharis20070805_lazz.jpg

To follow, 2 better shots.





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