Swansea Astronomical Society Blog

Saturday, April 24, 2010

 

Clavius and Plato regions in fine detail

Last night I used a DMK21 at the prime focus of a Skymax127 Maksutov to image opposite ends of the Moon. The crater Clavius region and The crater Plato region.
The Clavius region

Click on the image to see a larger view to see the very small craters that have been captured

Plato and the Alpine Valley

Click on the image to see a larger view.
Even though very tiny craters were imaged, the angle of the sunlight did not reveal the craters on the floor of Plato

Steve Wainwright
 

The Moon 23/04/10

The above picture was taken at Fairwood last night with my Canon EOS 1000D Digital SLR using my Celestron Nexstar 8SE. 3 photos were taken at 1/500 sec and stitched together using Autostitch.

 

An Afocal Evening

Last night Jody Arnold visited Fairwood with her son Lloyd. They brought his Celestron Nextstar 114 SLT telescope. We used a Fujifilm F-450 compact camera and took some afocal (Through the eyepiece) images of the Moon through the 114 SLT, through Gaynor's Nextstar 8SE and through the society's 12" LX200.
Nextstar 114 SLT image


Jody took this image through Gaynor's Nextstar 8SE


I took this image through the LX200


These images show that astrophotography of the Moon is possible even with a simple, hand held compact camera and a variety of telescope equipment.

Steve Wainwright

Friday, April 23, 2010

 

An update on what's going on at CERN

Many thanks to Simon Hands who gave us a fascinating insight tonight on the search for the Higgs Boson and other particles which is currently going on at CERN. Thanks also go to Italian taxi driver Massimo who drove Simon 13 hours to the port at Calais to get him back to the UK in time!

Thursday, April 22, 2010

 

Samsung Super Dynamic Range for Lunar Imaging

The Samsung SDC-435 video camera has a function called SSDR (Samsung Super Dynamic Range). The function causes the darker parts of a high contrast image to be selectively brightened automatically to reveal structure in the dark areas. This is useful for Lunar imaging where problems of contrast on the lunar terminator frequently render the darker areas invisible.
I Used a KWORLD DVD Maker USB2.0 capture card and the Astrovideo software to capture 1000 frame AVIs with SSDR turned off and with SSDR turned on. All other settings remained the same. In each case the best 550 frames were stacked in Registax.

SSDR OFF


SSDR ON


Considerably more structure has been revealed by the SSDR.
The SDC-435 seems to be also a useful lunar imaging device.

Steve Wainwright

Wednesday, April 21, 2010

 

The Samsung SDC-435, A new Astronomy Video Camera

The Samsung SDC-435 is a frame accumulating camera that is about 35% the price of a Mintron video camera.

I am experimenting with the SDC-435 to determine whether it is a credible alternative to the Mintron.

The Camera

:

I attached the camera to a 10" f/4.8 Newtonian reflector telescope and used Astrovideo to capture 100 frame AVIs with a 5s delay between the capture of individual frames. The sens was set to auto and max accumulation of 512. AGC was set to high and the camera was set to colour. A 100 frame dark-frame AVI was captured with fixed align with the cap on the front of the scope.

The camera adjusted automatically so

that the dark-frame was far too light as discussed for Mintron Dark Frames in our article in 'Popular Astronomy' April-June 2010. Astrovideo also simultaneously tracked and summed the captured frames and produced an image that was saved as a .BMP file. This image was then used along with the dark-frame in Dark-Frame-Scaler to produce a corrected dark-frame for use with the AVI in Registax.

The first results are presented here rescaled from 640 x 480 to 500 x 375:

M13

M3:

M51

M64:

M57:

The Gimp was used to change the colour balance from the original result:

Clearly the colour information was there. I shall investigate camera settings to see whether this can be improved. The blueish tinted filter that filters out IR in front of the 1/3" chip will also cut down H-alpha to levels that could be below 20% of their actual values. I shall look into the possibility of modifying the camera by removing this filter in the future.

My intitial reaction is that this camera can be used for Deep Sky observing and imaging although the live views have a fair bit of colour noise.

I shall also evaluate the camera as a lunar and planetary imager.

Steve Wainwright


 

Last Night's images

These are images I took last night.
 
They were taken through an 11" Celestron telescope, the two deep sky with my Nikon D700 digital camera. The image of Saturn with a DBK21 Imaging
Source camera and a 2.5x barlow.
 
Keith Davies

Monday, April 19, 2010

 

A lunar mosaic

I used a 70mm achromatic f/10 refractor with a DMK21 camera fitted with a deep red filter to image the Moon in a daytime sky. This is what the sky was like when my imaging session was finished:


The red filter made the sky appear to be dark as it removed the scattered blue light of the daytime sky:


Click on the image to see a full size image.

Steve Wainwright

Archives

December 27, 2009   January 3, 2010   January 17, 2010   January 24, 2010   January 31, 2010   February 7, 2010   February 14, 2010   February 21, 2010   February 28, 2010   March 7, 2010   March 14, 2010   March 21, 2010   March 28, 2010   April 4, 2010   April 11, 2010   April 18, 2010   April 25, 2010   May 2, 2010   May 9, 2010   May 16, 2010   May 23, 2010   May 30, 2010   June 6, 2010   June 13, 2010   June 20, 2010   June 27, 2010   July 4, 2010   July 11, 2010   July 18, 2010   July 25, 2010   August 1, 2010   August 8, 2010   August 15, 2010   August 22, 2010   August 29, 2010   September 12, 2010   September 19, 2010   September 26, 2010   October 3, 2010   October 10, 2010   October 17, 2010   October 24, 2010   October 31, 2010   November 7, 2010   November 14, 2010   November 21, 2010   November 28, 2010   December 5, 2010   December 12, 2010   December 19, 2010   December 26, 2010   January 2, 2011   January 9, 2011   January 16, 2011   January 23, 2011   January 30, 2011   February 6, 2011   February 13, 2011   February 20, 2011   February 27, 2011   March 6, 2011   March 13, 2011   March 20, 2011   March 27, 2011   April 3, 2011   April 10, 2011   April 17, 2011   April 24, 2011   May 8, 2011   May 15, 2011   May 22, 2011   May 29, 2011   June 5, 2011   June 12, 2011   June 19, 2011   June 26, 2011   July 3, 2011   July 10, 2011   July 17, 2011   July 24, 2011   July 31, 2011   August 7, 2011   August 14, 2011   August 21, 2011   August 28, 2011   September 11, 2011   September 25, 2011   October 2, 2011   October 9, 2011   October 16, 2011   October 23, 2011   October 30, 2011   November 6, 2011   November 13, 2011   November 20, 2011   November 27, 2011   December 4, 2011   December 11, 2011   December 18, 2011   December 25, 2011   January 1, 2012   January 8, 2012   January 15, 2012   January 22, 2012   January 29, 2012   February 5, 2012   February 12, 2012   February 19, 2012   February 26, 2012   March 4, 2012   March 11, 2012   March 18, 2012   March 25, 2012   April 1, 2012   April 8, 2012   April 15, 2012   April 22, 2012   May 6, 2012   May 13, 2012   May 20, 2012   May 27, 2012   June 17, 2012   July 8, 2012   July 15, 2012   July 22, 2012   August 5, 2012   August 12, 2012   August 19, 2012   August 26, 2012   September 2, 2012   September 9, 2012   September 16, 2012   September 23, 2012   September 30, 2012   October 7, 2012   October 14, 2012   October 21, 2012   October 28, 2012   November 4, 2012   November 11, 2012   November 18, 2012   November 25, 2012   December 2, 2012   December 9, 2012   December 16, 2012   December 23, 2012   December 30, 2012   January 6, 2013   January 13, 2013   January 20, 2013   January 27, 2013   February 3, 2013   February 10, 2013   February 17, 2013   February 24, 2013   March 3, 2013   March 10, 2013   March 17, 2013   March 24, 2013   March 31, 2013   April 7, 2013   April 14, 2013   April 21, 2013   April 28, 2013   May 5, 2013   May 12, 2013   May 19, 2013   May 26, 2013   June 2, 2013   June 9, 2013   June 16, 2013   June 23, 2013   June 30, 2013   July 7, 2013   July 14, 2013   July 21, 2013   July 28, 2013   August 11, 2013   August 18, 2013   August 25, 2013   September 1, 2013   September 8, 2013   September 15, 2013   September 22, 2013   September 29, 2013   October 6, 2013   October 13, 2013   October 27, 2013   November 3, 2013   November 10, 2013   November 17, 2013   November 24, 2013   December 1, 2013   December 8, 2013   December 15, 2013   December 22, 2013   December 29, 2013   January 5, 2014   January 12, 2014   January 19, 2014   January 26, 2014   February 2, 2014   February 9, 2014   February 16, 2014   February 23, 2014   March 2, 2014   March 9, 2014   March 16, 2014   March 23, 2014   March 30, 2014   April 6, 2014   April 13, 2014   April 20, 2014   April 27, 2014   May 4, 2014   May 11, 2014   May 25, 2014   June 1, 2014   June 8, 2014   June 15, 2014   June 22, 2014   June 29, 2014   July 6, 2014   July 20, 2014   July 27, 2014   August 3, 2014   August 10, 2014   August 17, 2014   August 24, 2014   August 31, 2014   September 7, 2014   September 14, 2014   September 21, 2014   September 28, 2014   October 5, 2014   October 12, 2014   October 19, 2014   October 26, 2014   November 2, 2014   November 9, 2014   November 16, 2014   November 23, 2014   November 30, 2014   December 7, 2014   December 14, 2014   December 21, 2014   December 28, 2014   January 4, 2015   January 11, 2015   January 18, 2015   January 25, 2015   February 1, 2015   February 8, 2015   February 15, 2015   February 22, 2015   March 1, 2015   March 8, 2015   March 15, 2015   March 22, 2015   March 29, 2015   April 5, 2015   April 12, 2015   April 19, 2015   April 26, 2015   May 3, 2015   May 10, 2015   May 17, 2015   May 24, 2015   May 31, 2015   June 7, 2015   June 14, 2015   June 21, 2015   June 28, 2015   July 5, 2015   July 12, 2015   July 19, 2015   July 26, 2015   August 2, 2015   August 9, 2015   August 16, 2015   August 23, 2015   August 30, 2015   September 6, 2015   September 13, 2015   September 20, 2015   September 27, 2015   October 4, 2015   October 11, 2015   October 18, 2015   October 25, 2015   November 1, 2015   November 8, 2015   November 22, 2015   November 29, 2015   December 20, 2015   December 27, 2015   January 3, 2016   January 10, 2016   January 17, 2016   January 24, 2016   January 31, 2016   February 7, 2016   February 14, 2016   February 21, 2016   February 28, 2016   March 6, 2016   March 13, 2016   March 20, 2016   March 27, 2016   April 3, 2016   April 10, 2016   April 17, 2016   April 24, 2016   May 1, 2016   May 8, 2016   May 15, 2016   May 22, 2016   May 29, 2016   June 5, 2016   July 10, 2016   July 17, 2016   July 31, 2016   August 7, 2016   August 14, 2016   August 21, 2016   August 28, 2016   September 4, 2016   September 11, 2016   October 2, 2016   October 9, 2016   October 16, 2016   October 30, 2016   November 6, 2016   November 13, 2016   November 20, 2016   November 27, 2016   December 4, 2016   December 11, 2016   December 18, 2016   December 25, 2016   January 1, 2017   January 8, 2017   January 15, 2017   January 22, 2017   January 29, 2017   February 5, 2017   February 12, 2017   February 19, 2017   February 26, 2017   March 5, 2017   March 12, 2017   March 19, 2017   March 26, 2017   April 2, 2017   April 9, 2017   April 16, 2017   April 23, 2017   April 30, 2017   May 7, 2017   May 14, 2017   May 21, 2017   May 28, 2017   June 4, 2017   June 11, 2017   June 18, 2017   July 2, 2017   July 9, 2017   July 16, 2017  

This page is powered by Blogger. Isn't yours?

Subscribe to Posts [Atom]