Saturday, July 8, 2017

More images taken through the Celestron

During the holiday weekend, I set up the Celestron and proceeded to start taking 30-second AVI video files of the moon, Jupiter and Saturn with the video eyepiece for later processing. I then imported them into Registax 6, and extracted these still images from them. I have been learning how to use the features of Registax then Photoshop to suppress noise and get as sharp a picture as possible with a limited capability camera.
The crater Eratosthenes, lunar Apennines and crater Archimedes.
Saturn and it's rings.

The lunar north polar region, the crater Plato and the Alpine Valley.

Close up of the Alpine Valley.

Close up of the crater Clavius.

The Straight Wall and its surroundings.

The planet Jupiter and the Great Red Spot.

Close up of the crater Eratosthenes and lunar Apennines'.

Close up of the crater Tycho and its central peak.

Lunar terminator with the craters Clavius and Tycho.
Close up of the crater Plato.
The extreme close ups of the moon and the images of the planets were made in the same way, by placing a 2.8X University Optics Barlow lens between the telescope and the camera to stretch the focal length to nearly 6,000mm. The wider area images of the moon were made by directly coupling the camera to the telescope's visual back.That gave the required image scale for closes ups of lunar craters and the planets while the image remained relatively sharp in spite of the turbulence in the atmosphere overhead. The seeing was good, but not excellent. As for the color fringing I noted, it's not due to the Barlow lens of the optics, it's refraction caused by the atmosphere and the low altitudes of the moon, Jupiter and Saturn that are the norm during the summer. I have been able to partially remove that with Registax 6, but not entirely. However, I am very pleased with what I have been able to achieve thus far, especially with the close ups of the lunar craters and other lunar features such as the Straight Wall. I will keep working with this camera until I can find a better one, possibly a camera that can be used for both planetary and deep sky objects.

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