|Imaging Conditions : >|
WebCam Philips VestaPro modified (version 1) equipped with B&W sensor SONY ICX098BL on my 8" Celestron + 3.3 Meade Reductor + Celestron LPR Filter .
Checking of the telescope's collimation on Betelgeuse, focused by the aigrette method.
Capture of 94 40s individual frames.
Note: for the treatment 2 images were eliminated...
Parameters of acquisition: Gain 70%, Gamma 50%.
Here is one of the 94 rough images - Reduced to 80% >
Obscure nebula is perceptible on this individual frame.
Acquisition of 11 darks, telescope closed.
Acquisition of 11 ULP by pointing the orange horizon, the telescope being closed by a white translucent bag.
Rem: The use of LPR filter is undoubtedly for much in the success of this attempt. Indeed, by reducing the parasitic radiation of urban lighting, I could increase the exposure time and thus appreciably improve the signal report/ratio on noise of each rough image...