Astrophotography in the changes of time - M57 and M51 once and now!

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M 57 once...

...2005...

...and 2003!

There are really 19 years between these pictures of the Ring Nebula! I grubbed in my archive and found the first image I've done with the Bismarck Telescope in January 1986. The right image is also taken with Bismarck with state of the art technology. The 5 megapixel Casio digicam borrowed from the Wendelstein came to use. This image is made from 8 stacked images everyone with an exposure time of 60 secs. Additional to these images a dark image for reduction during stacking was taken. For stacking the program Giotto from Georg Dittie was used. The image in the middle is new and was done with the Canon Ixus 430 camera. 55 15sec exposures were added, a dark frame was also used. The images were stacked by using the program RegiStax .

Whirlpool Galaxy M 51, seen with Bismarck:

Messier 51 historic:	Messier 51 composit:	Messier 51 1600 ASA:	Messier 51 200 ASA:
Slightly older but remarkable Bismarck impression of the Whirlpool Galaxy.	Image from the year 2004: four 10 mins shots done with a Barlow lens have been digitalized and stacked.	I have also done a 15 min single frame in the same night. Both images on Panther 1600.	Another focal shot, now on Fuji Sensia 200.

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