Archived posting to the Leica Users Group, 2020/12/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Stunning stuff! Cheers Jayanand On Mon, Dec 21, 2020 at 8:35 PM Howard Ritter via LUG <lug at leica-users.org> wrote: > Hi, Peter? > > The images are single exposures. Since posting them, I?ve learned how to > stack multiple images of the same field to improve S/N and reduce color > noise and granularity. It makes a huge difference! > > I?ve just posted < > http://gallery.leica-users.org/v/hlritter/Nikon+Astro/?g2_fromNavId=x98ac3343> > a stacked version of the same Orion field as well as a stack of frames > taken through a narrower emission-line filter. The latter I think is my > preference. > > > http://gallery.leica-users.org/v/hlritter/Nikon+Astro/?g2_fromNavId=x98ac3343 > < > http://gallery.leica-users.org/v/hlritter/Nikon+Astro/?g2_fromNavId=x98ac3343 > > > > ?howard > > > On Dec20, 2020, at 1250, Peter Dzwig <pdzwig at summaventures.com> wrote: > > > > Howard, > > > > are those single shots, or did you stack them? The one of the Orion > > nebula is particularly fine. > > > > Peter > > > > On 19/12/2020 21:38, Howard Ritter via LUG wrote: > >> Congratulations, Douglas. A first astronomical telescope is a memorable > and possibly fateful thing, potentially a trap as dangerous as a first > camera. With me it went the other way: At about age 10, my parents got me > an Edmund Scientific 3? reflector, and this was enough to launch me on a > lifelong hobby. I got my hands on a camera at about the same age. It?s a > tossup which hobby has consumed more of my time as well as money! The apex > was a 25? Dobsonian (I?ve downsized to a mere 20? now, plus a 6? refractor > and a pair of 100mm astronomical binoculars.) > >> > >> The Dobsonian format is the ideal one for a neophyte, and a 6? aperture > will show you wonders. I recommend getting a guide to the Messier objects, > of which many look great in 6? of aperture, as I know firsthand. And you > won?t need to be told to point your scope at the Moon! Dobson was a > creative genius and the patron saint of amateur observers around the world, > a tireless advocate of astronomy on the cheap for the masses. > >> > >> Good luck with the weather next Monday. Ours in Florida looks > unfavorable. Because of that, I took the time to get a picture of the pair > last night, when they were still 4 times as far apart as they will be on > the 21st. After moonset, be sure to have a look at the Northern > Hemisphere?s deep-sky (as opposed to Moon and planets) showpiece, the Orion > Nebula. If you don?t have dark surroundings, take a dark cloth or hoodie to > shut out all extraneous light as you look at the nebula and so you can keep > both eyes open while you look. Start with an eyepiece that will give you > about 50x. > >> > >> I put my images of Jupiter and Saturn, as well as the Orion Nebula, on > the Gallery here <http://gallery.leica-users.org/v/hlritter/Nikon+Astro/>. > >> > >> http://gallery.leica-users.org/v/hlritter/Nikon+Astro/ < > http://gallery.leica-users.org/v/hlritter/Nikon+Astro/> > >> > >> ?howard > >> > >>> On Dec19, 2020, at 1326, Douglas Barry <imra at iol.ie> wrote: > >>> > >>> This is the telescope I got recently as a birthday present from my > sons. It works extremely well, even in light polluted suburbia. I haven't > taken it out to darker skies yet due to the pandemic. > >>> > >>> > http://gallery.leica-users.org/v/DouglasBray/Sky+Quest+Dobsonian.jpg.html > >>> > >>> With the conjunction of Jupiter and Saturn coming up on Monday, I hope > it won't be too cloudy so that I can use this. It's pretty good for a 6 > inch, but with my back bothering me at the moment, I could with lightening > the Dobsonian base a bit without sacrificing stability. Maturer years don't > like heavy weights. > >>> > >>> By the way, if you would like some marvellously therapeutic viewing > have a look at the great John Dobson making a reflector telescope by hand, > including hand grinding and polishing the 16 inch mirror. > >>> https://www.youtube.com/watch?v=snz7JJlSZvw > >>> > >>> Douglas > >>> > >>> > >>> > >>> _______________________________________________ > >>> Leica Users Group. > >>> See http://leica-users.org/mailman/listinfo/lug for more information > >> > >> > >> _______________________________________________ > >> Leica Users Group. > >> See http://leica-users.org/mailman/listinfo/lug for more information > >> > > > > -- > > > > Dr. Peter Dzwig > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information