Astronomie

Canon 700D in prime focus of D=15 cm f=750 mm reflector. T=68X4 seconds ISO 1600 Messier 57 ist ein planetarischer Nebel im Sternbild Leier. Der Nebel ist der Überrest eines Sterns, der vor etwa 20.000 Jahren seine äußere Gashülle abgestoßen hat. Die Gashülle dehnt sich mit einer Geschwindigkeit von 19 km/s aus und hat derzeit einen scheinbaren Durchmesser von ca. 118 Bogensekunden, was bei einer Entfernung von 2300 Lichtjahren einen absoluten Durchmesser von ca. 1,3 Lichtjahren bedeutet.

Upper picture 33 exposures 30 seconds each no tracking. Lower picture 7 exposures 30 seconds each with tracking Note that upper picture shows that the Polarstar is not exactly north

You have to find the Polarstar to make startrails pictures like the one shown in the PIP. It shows the reflection of the rotation of the earth For the PIP picture I used 65 exposures (30 seconds each)

Second picture from left is made on date given by EXIF's

Left: startrails 30 minutes, 50 exposures of 30 second each, f/5,6, f=11 mm, ISO 800 Right: single exposure 30 seconds, f=11 mm, f/3,5, ISO 1600

21:23 single exposure 21:28 -- 21:43 trail, 160 exposures each exposure T= 5 sec, f=31 mm, ISO 200, f/13

Taken in Kappellenmoor near Oberlangen Combined 6 exposures 15 seconds each, thats why the horizon is blurred Many nebulae from Messiers list. He made this list to help him to find comets

Every 15 minutes a picture. Every picture T=30 sec. ISO 1600 F=12 mm and f/3,5 Use maximum size to look at

Daybreak and upcomming clouds in the morning

Combination of five exposures. It shows 5 Perseiden that appeared within an hour. The pictures also shows 5 open clusters and the galaxy M 31

The night before the maximum of the Perseid meteor shower was a clear night (at least here). The humidity was very high. Two (netto) hours of pictures, 30 seconds each resulted in only two (!!!!) clear meteors in this region between Cassiopei (top) and Cygnus (bottom) (size about 85x63 degees)

The night before the maximum of the Perseid meteor shower was a clear night (at least here). The humidity was very high. Two (netto) hours of pictures, 30 seconds each resulted in only two (!!!!) clear meteors in this region between Cassiopei (bottom left) and Aquila (top right). The night 11/12 August was cloudy

Best wideangle picture of the Milkyway sofar. Obtained august 2016 during the Perseïden session. This year no good oppertunities to improve on this one. Combined 20 exposures each ISO 1600 f=11 mm, f/3,5 t= 30 sec. This reduces noise by about a factor 4 to 5. Tracked by small telescope

Im Emsland sind die Wetterbedingungen im Moment gut für solche Fenomene

Canon 700D, f/2,8, 30 sec, ISO 1600, f=18 mm. Single exposure. At 3 o'çlock in the morning, camera on the roof of the car. That's it. Below the inverted B/W version of the top picture.

Left: f/2,8, f=18 mm, T=45x30 sec, ISO 800 Right: f/2,8, f=70 mm, T=10x30 sec, ISO 800 tracking by small telescope Red rectangle is area of the picture on the right