A focal length of 570 mm allowed me to fit both nebulae into the field of view of the APS-C sensor size. My first attempt of M20 was made with a focal length of 917 mm, the second one with 630 mm and now I used a gentle focal reducer. Therefore every time I travel south, I take the opportunity and recapture these nebulae. Due to the very low southern declination, it’s challenging to photograph these deep space objects from my home place in Central Europe. On the other hand, the Lagoon nebula (right side) is an emission nebula – a giant cloud of ionized HII gas. Trifid Nebula (up left) is a combination of a reflection nebula (blue part), a dark nebula (brown clouds), an emission nebula (red region), and a star cluster. This means we are looking in the direction of the galactic core of the Milky Way. These two magnificent nebulae are located visually close to each other in the constellation Sagittarius. The picture was taken under the dark skies of Fuerteventura and it’s a stack of 73 pictures, 3 minutes each, which makes the total integration time 219 minutes. In order to capture the whole complex, one has to use a significantly shorter focal length, like 130 – 200 mm. The picture shows just a small frame of the significantly bigger nebula, called the Rho Ophiuchi complex, which combines star Antares, globular cluster M4, and many more reflection, emission, and dark nebulae. A smaller reflection nebula called IC 4603 is located on the right. The light from the stars is partially absorbed by the gas, which makes the blue reflection nebula visible. Rho Ophiuchi is a triple star system (on the left side of the picture) in the constellation Ophiuchus. In total, the camera collected 15.5 hours of light and I am happy with the result. Let’s keep the focal length 180 mm and let’s have a look at the left star Deneb and very famous North America nebula:Īgain, let’s keep the focal length 180 mm and change to perspective to the bottom (eastern) star Aljanah, where the beautiful supernova remnant the Veil nebula is located: Let’s zoom further to the central star Sadr by change of the lens to 180 mm focal length: Here the constellation is perfectly centered: Let’s zoom a bit by changing the lens to a 50 mm focal length. Let’s have a look at a wide-field picture captured by a 24 mm lens attached to Canon EOS 6Da: It is located visually on the plane of the Milky Way galactic disk, therefore there are many deep space objects. For example constellation Cygnus, which is sometimes called the Northern Cross. However, there are some regions full of stars and deep space objects. Obviously, if you are in a dark place, you can point your camera nearly anywhere. Then I started to think about the next objects. The primary target was Rho Ophiuchi, which I captured really well. Stanke et al./Igor Chekalin/Digitized Sky Survey 2.Īll of this - the forming stars, the light-blocking dust, the diffuse, ionized hydrogen and the dominant, bright blue reflection - is just one tiny fraction of the massive, Great Orion Complex hundreds of light-years across, and the small piece we looked at today makes up the 78 th object in Messier's catalog.I went to Crete without a detailed plan on which deep space objects to capture. Image credit: ESO/APEX (MPIfR/ESO/OSO)/T.
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