Archived posting to the Leica Users Group, 2020/12/21

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Subject: [Leica] IMG: 6 inch reflector
From: jayanand at gmail.com (Jayanand Govindaraj)
Date: Mon, 21 Dec 2020 20:40:12 +0530
References: <e869f698-6967-ef94-8dbf-26b75902a553@iol.ie> <EA4ABA63-215B-42C0-AD93-08DCCFA30599@bex.net> <a4ee324a-472d-5708-b1ae-635e221d32ca@summaventures.com> <90B6FECA-11A0-40E2-8E4B-A3241C08B95B@bex.net>

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


In reply to: Message from imra at iol.ie (Douglas Barry) ([Leica] IMG: 6 inch reflector)
Message from hlritter at bex.net (Howard Ritter) ([Leica] IMG: 6 inch reflector)
Message from pdzwig at summaventures.com (Peter Dzwig) ([Leica] IMG: 6 inch reflector)
Message from hlritter at bex.net (Howard Ritter) ([Leica] IMG: 6 inch reflector)