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Samyang 135mm

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North American and Pelican Nebulae with Samhyang 135mm and QHY268C This is my first ever image capture with the excellent NINA software.  I used my widefield rig which consists of the Samyang 135mm lens and QHY268C OSC camera using an IDAS 2″ LP filter.The image set is a modest 18 x 180s exposures, all binned 1×1.  Pre-processed and processed in PixInsight and a few tweaks in Photoshop.

Simeis 147 (Sharpless Sh2-240) sometimes called The Spaghetti Nebula is a supernova remnant of a star that exploded forty thousand years ago.  It sits across the border of Taurus and Auriga and is a huge object, about six moon widths across.  It is located about 3000 light years away.  Because of its extremely low surface brightness it was only discovered as recently as 1952.  It is an exceptionally difficult object to observe visually and to have any hope of seeing it with your own eyes at the eyepiece requires extremely dark skies (Bortle 1), specialist filters, immaculate seeing and transparency and extreme dark adaption of your eyes.  This rules out almost anywhere near civilisation.  Personally speaking, I have never known any astronomer who has seen it visually.  Even with photography it requires very long exposure times to bring out any detail. Simeis 147 Image Technical Data This image was created…

The California Nebula – NGC 1499 – is a vast hydrogen gas emission nebula about 1000 light years away in the constellation of Perseus.  It is named as such because of its vague resemblance to the US state of California.It is an extremely faint, large and diffuse object, about four times the diameter of the moon.  It is almost completely invisible visually without specialist filters and was not discovered until the advent of astrophotography in 1884.  The nebula shines by reflecting the light of the bright star Markib.  It shines red because Hydrogen atoms, when excited by nearby bright sources like stars, emit or re-radiate light at the 656nm wavelength which is in the red part of the spectrum to our eyes. The California Nebula Image Technical Data The California Nebula is so large that most telescopes cannot get the nebula in the field of view, nowhere near in fact. …

The Veil Nebula in Cygnus is the remnant of a supernova of a star about 20 times the mass of the sun that exploded about 20000 years ago. The nebula is a huge, very faint and diffuse object, about six moon widths in diameter and is located about 2500 light years away. Very few telescopes can capture the entire Veil Nebula complex due to the huge angular size that it presents on the sky and creating a multi-frame mosaic is a very time consuming process, especially in the UK where clear nights are such a rare and premium time. This makes DSLR lenses ideal and few are better or as cost effective as the Samyang 135mm that was used to capture this image. The Veil Nebula in HaRGB Image Technical Details The image was captured from my backyard in Nottingham in the UK on the nights of the 13th and…

The Heart and Soul Nebulae are a well known and famous pairing of Nebulae in the late summer/autumn sky of the Northern Hemisphere.  These nebulae are located far away – 7500 light years – in the Perseus arm of the galaxy, further out from the core of the galaxy than the Sun and are vast star forming regions rich in Hydrogen Alpha that gives the images the intense red glow.All image data collected with a Samyang 135mm lens at F2.8 with a Moravian G2-8300 CCD camera.  Below is the RGB image gathered with Astrodon RGB filters.  All binned 1×1:  Red 14 x 300s; Green 13 x 300s; Blue 14 x 300s.  This gives an RGB integration time of 210 minutes or three and a half hours.The picture looks nice but it does lack punch and vibrancy as it stands.  It needs the addition of the Hydrogen Alpha data that will…