Remeis observation guide - Revision history

Zangrandi at 16:13, 28 April 2026

2026-04-28T16:13:50Z

Kuehnel at 13:47, 20 April 2018

2018-04-20T13:47:43Z

Kuehnel at 13:11, 20 April 2018

2018-04-20T13:11:24Z

Kuehnel at 13:09, 20 April 2018

2018-04-20T13:09:36Z

Kuehnel: Created page with "Category:Observatory This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp. We are equ..."

2018-04-20T13:08:32Z

Created page with "Category:Observatory This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp. We are equ..."

New page

[[Category:Observatory]]
This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp.

We are equipped with two important cameras: the astronomical CCD camera [http://www.sbig.com/sbwhtmls/large_format_cameras.htm SBIG STL-11000M] and the consumer DSLR camera [http://www.canon.de/For_Home/Product_Finder/Cameras/Digital_SLR/EOS_1000D/ Canon EOS 1000D].

= SBIG STL-11000M =
As all astronomical CCD cameras, the ST11K does only obtain black/white images, i.e. to obtain color images one needs to make images with different filter wheels and combine them later using software like [[ISIS]] or [http://www.msb-astroart.com/ AstroArt].

See the [[observation log]] for an overview of what has been achieved so far.

The ST11K has a 11 Mpixel 36 x 24.7 mm CCD sensor.

== Field of View ==
The Field of View (FoV) when attached to the '''40cm MEADE telescope''' (f/10) is 0.52° x 0.35° i.e.,''' 31.0′ x 21.1′'''. Or, if the camera is oriented in a way that North is up, i.e. the camera is attached to the telescope so that its one side is parallel to the mounting, we can express the FoV in minutes of RA and DEC (where RA is given in hours rather than degrees): RA 0h 2.1′ x DEC 0° 21.1′. This information is helpful when comparing the FoV to the image in Stellarium displayed in equatorial mount mode.

When attached to the '''51cm telescope''' (f/6.8) the FoV is '''35.9′ x 23.94′'''.

For comparison, the former '''60cm telescope''' (f/18) has '''11.5′ x 7.8′''' (RA 0h 0.76′ x DEC 0° 7.8′).

== Regenerating the Desiccant ==
The ST11K has a small container of desiccant inside to reduce the (air) humidity. This avoids the growing of ice on the CCD. The desiccant is, however, saturated after some time and has to be regenerated: 
1. Open the camera by removing the screws on the front. Be careful not to touch any filter on the filter wheel, which is mounted at the back of the front plate. 
2. Remove the desiccant container mounted at the right of the CCD chamber (see picture). 
4. Close the resulting hole in the chamber with tape to avoid dust to flow in. 
5. "Bake" it in an oven (e.g. in the kitchen of the meridianbuilding) for 4 hours at 175°C. 
6. Attach the container (after it cooled down, of course) back to the CCD chamber and close the camera.

= Canon EOS 1000D =
Being a very recent addition to the Remeis imaging crew (Fall 2010) not so many pictures were yet taken with the Canon. It's big advantage over the ST11K is that color images are obtained directly, making the post-processing much easier and more beginner friendly. Its huge disadvantage is the higher noise-level and that all images are already strongly processed by the internal computers, so that astrometry or photometry is impossible. In January 2011 it was modified by Canon to be more sensitive in the Infrared, a so-called Astro-Mod.

The Canon has a 10.1 Mpixel 22.2 x 14.8 mm CMOS sensor.

== Field of View ==
When attached to the '''40cm MEADE telescope''' (f/10) the FoV is 0.32° x 0.21° i.e.,''' 19.1′ x 12.7′'''. 
Attached to the '''60cm telescope''' (f/18) the FoV is '''7.07′ x 4.71′'''.

← Older revision		Revision as of 13:47, 20 April 2018
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−	[[Category:~~Observatory~~]]	+	[[Category:Current Members]]
	This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp.		This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp.

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 = SBIG STL-11000M =
-As all astronomical CCD cameras, the ST11K does only obtain black/white images, i.e. to obtain color images one needs to make images with different filter wheels and combine them later using software like [[Category:Isis / Slang]] or [http://www.msb-astroart.com/ AstroArt].
+As all astronomical CCD cameras, the ST11K does only obtain black/white images, i.e. to obtain color images one needs to make images with different filter wheels and combine them later using software like [[:Category:Isis / Slang|ISIS]] or [http://www.msb-astroart.com/ AstroArt].
 See the [[observation log]] for an overview of what has been achieved so far.

@@ Line 2: / Line 2: @@
 This page should contain information and tips & tricks about what to do to obtain beautiful images from planets, nebula, galaxies, etc pp.
 We are equipped with two important cameras: the astronomical CCD camera [http://www.sbig.com/sbwhtmls/large_format_cameras.htm SBIG STL-11000M] and the consumer DSLR camera [http://www.canon.de/For_Home/Product_Finder/Cameras/Digital_SLR/EOS_1000D/ Canon EOS 1000D].
 = SBIG STL-11000M =