Hi Steve & all,
Steve Chambers wrote:
<em class="quotelev1">> I must admit that I have jumped to the conclusion that they are the
<em class="quotelev1">> same company just because Astronomica's camera is a development
<em class="quotelev1">> of the "mythical" ES 640 which is the name of a similar camera sold
<em class="quotelev1">> by Astromeccanica.
A very reasonable "jump" if you ask me, but I always like to keep facts and
assumptions separate.
But the facts are: http://www.astromeccanica.it/immagini/es640_2.jpg
The label says: "Color CCD Camera by Astronomica".
<em class="quotelev1">> I have only contacted Astronomica and was passed to a lawyer service
<em class="quotelev1">> which left me in no doubt that they did not want to discuss if the easy
<em class="quotelev1">> shot was a modified webcam!
http://www.astromeccanica.it/eng_infocamera.html
<em class="quotelev1">> I am amazed at the similarity of the picture taken with the easy shot
<em class="quotelev1">> and the one in your (Carstens') tutorial.
I did a small analysis to see if there could be more to it than similarity.
First, I loaded my image into a layer in Photoshop, and the Astronomica
image in a second layer. I set the second layer opacity to 50% and aligned
the images like I normally do for Moon mosaics. The match was almost 100%,
including image scale. The only difference was contrast or gamma, plus field
of view.
As the Astronomica version was smaller, I cropped both layers and saved them
to separate BMP files. I converted the Astronomica version to negative in
Irfanview (don't know yet how to do it in Photoshop, someone will teach me
soon :-). My cropped original and Astronomica's negative was summed in
K3CCDTools. The result was
http://home.online.no/~arnholm/astro/misc/m57_subtract.jpg
It is the same image.
Clear skies
Carsten A. Arnholm
http://home.online.no/~arnholm/astro/astro.htm
N59.776 E10.457
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