At astroGC we use free software for post processing of images. The camera is setup to save a RAW format of each picture. This produces extremely large files as it just save all the infomation from the camera chip. But this format alows to retouch the color balance, exposure and hundreed of more parameters. We do this treatment with RAWTHERAPEE, a free program under GNU licence. Afterwards, a last retouch can be performed with GIMP, also free / GNU licenced program. Thanks to both companies for developing such powerful softwares.

Comments

Post a Comment

Popular posts from this blog

Image
Happy to share with you this nice shoots we took during this week:



This one has been taken using a mobile phone and our powerful hand made telescope. The waning moon is rising up the pine trees situated about 15 km away. A few clouds on the horizon give a special interest to this picture.


This one is of our hand made telescope. In the background there are a few pine trees I was lighting with my front headlight during the 30 seconds exposure of the photography. This is a genuine picture. Nevertheless the post treatment of the foreground is slightly different from the post treatment of the background with the starry sky.



This one has been done yesterday. Despite of an apparently clear sky on the picture we actually had troubles with clouds yesterday. We finally had to go up to Roque Nublo (Center of Gran Canaria). The sky was clear there and we enjoyed a very good astronomy observation.



Read more

How many micrometeorites are falling in my garden?

Image
Micrometorites are falling constantly everywhere. Their origin is unclear, according to some studies, most of them could come from comet dust. They are the oldest materials of the solar system. They are beautiful.




They are everywhere. On your doorstep, on your home roof, on your car roof. Any step you take outdoor, you step on many of them.

But you cannot see them. They are too small.

A very good question is : How many are they?

This apparently easy question is actually quite hard to answer. It depends on what you call a micrometeorite and what is your source of information. Next we are going to make an attempt answering.

The first definition of micrometeorites was actually only referring to unmelted particles. But in the last 20 years it happens scientist are calling micrometeorites to both melted and unmelted particles. Let us consider as "micrometeorite" any particle less than 1 mm in diameter coming from the space "as it" (not from a bigger body that broke up during…
Read more

Hydraulic power station in Gran Canaria

Image
The company Red Electrica de España is planning to build a huge hydraulic power station between the dams of Soria and Chira in Gran Canaria.
This is quite near the area where we are going to stargaze at astroGC.
Fortunately the area being protected, the hydraulic power station will be underground.




The plan is to pump the water up when the wind turbines are producing more energy than the consumed energy on the island. And recover this energy when needed.
More info (in Spanish) here: www.soriachira.com
Read more