galaxy fields

M 101 is a galaxy in the constellation Ursa Major (in which Alkaid is one of the brighter stars). The halo around the bright stars is due to lens errors. Left and middle a positive and negative display of whole field, taken with Canon 700D and Samyang lens: f=85 mm, f/2.0, ISO 1600, T=50x15 sec. Picture on the right taken with Canon 700D attached to telescope: f=750 mm, f/5, ISO=3200, T=50x15 sec.

Left and middle a positive and negative display of whole field, taken with Canon 700D and Samyang lens: f=85 mm, f/2.0, ISO 3200, T=50x15 sec. Picture on the right taken with Canon 700D attached to telescope: f=750 mm, f/5, ISO=3200, T=40x15 sec. Finally a nice clear sky and a possibility to find NGC 5907, an edge-on galaxy I studied ~40 years ago with the WSRT radiotelescope in the Netherlands

Alkahid is a bright star in Ursa Major Left: Samyang lens f=85 mm, f/2,0, ISO 1600, T=25x15 sec. Middle: same as left but negative to show details better Right: used telescope f=750 mm D=15 cm (i.e. f/5). T= 50x8 sec ISO 3200

Left: Samyang lens f=85 mm, f/2,8, ISO 1600, T=50x15 sec. An area of 10x15 degrees Right: same as left but negative to show details better. A large number of galaxies (not all) have been indicated by a red bar

Lucky to have in April more than a week clear skies. Time for the Virgo cluster. This galaxy cluster contains more than 5000 galaxies. It hosts a number of "famous" galaxies, a.o, M87 the jet and black hole elliptical galaxy To the left: 10 x 15 degree area centered on the Virgo cluster In the middle: a negative rendition of the left picture Top right: a cropped version of the picture on the left Lower right: a telescopic picture of the centre of the Virgocluster

Pictures made with Canon 700D in prime focus of d=15 cm and f=750 mm Newton reflector. The Virgo cluster contains about 5000 galaxies, each galaxy contains more than 1000000000 stars

The Leo Triplet are three well known galaxies in the constellation Leo. Left: Samyang lens f=85 mm, f/2,8, ISO 800, T=50x15 sec. An area of 10x15 degrees Middle: same as left but negative to show details better.. Right a cropped picture to show the galaxies better. PiP: used telescope f=750 mm D=15 cm (i.e. f/5). T=40x30 sec ISO 3200

The Leo group is a group of galaxies in the constellation Leo. Left: Samyang lens f=85 mm, f/2,8, ISO 800, T=50x15 sec. An area of 10x15 degrees Middle: same as left but negative to show details better.Ten galaxies of the Leo group are indicated. Inset cropped picture to show the better known galaxies better. PiP: used telescope f=750 mm D=15 cm (i.e. f/5). T=130x15 sec ISO 3200

Find the seven galaxies. Combined 5 exposures