Mastodawn

ryderdavid 🔭🚲🪐🌌Dec 20, 2023

Hi! Long time no see. Finished a project I’m pretty proud of—14 hours on IC 63, the Ghost of Cassiopeia. 4 hours shot in the total dark at the Tucson Amateur Astro Assoc’s Chiricahua Astro Complex in far southeast Arizona, the other 10 shot in narrowband in my Phoenix backyard, on a Hyperstar C6 rig, with an ASI533MC Pro. Really proud of how I kept Gamma Cassiopeiae under some degree of control at least by hyperstar standards. #astrophotography #astrodon

ryderdavid 🔭🚲🪐🌌Sep 30, 2023

Kelly Lepo Sep 29, 2023

JWST is a fancy telescope designed for science. So while it can produce very beautiful images, it's not quite a point-and-shoot camera.

Here is an image of the Pillars of Creation that I downloaded from the MAST archive. Notice how all of the stars have black centers? That's not what the stars actually look like — it's an artifact introduced by the NIRCam detector.

A 🧵 on #JWST image artifacts.
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Learn more: https://webbtelescope.org/contents/articles/how-are-webbs-full-color-images-made

#astronomy #Space #Astrodon

How Are Webb’s Full-Color Images Made?

Learn how the James Webb Space Telescope’s full-color images are processed, and why it takes time to refine and release them.

WebbTelescope.org

ryderdavid 🔭🚲🪐🌌Sep 8, 2023

18 hours of Sadr Region, HOORGB palette, shot on my Rokinon 135mm Cine lens at f/2.8 (f/4.5 stars shot in RGB)! This was so fun to shoot and my first serious project with this lens. They are so temperamental -- spent three nights dialing in my back focus and tilt -- but when you look and see tight stars in the corners, it so pays off to get to shoot this wide this fast! Love it! Full quality and shot details available at: https://www.astrobin.com/full/rjnt6h/0/#

#Astrophotography #Astrodon

Sadr Region in HOORGB (ryderdavid) - Full resolution | AstroBin

Community for astrophotographers

ryderdavid 🔭🚲🪐🌌Sep 4, 2023

just got started on a (hopefully) four-night project, shooting the Sadr Region in Cygnus with my Rokinon 135mm lens! Getting back focus right at f/2.8 is nerveracking and don't think it's perfect but will swap in stars reshot at f/4 or f/5 when I’ve gotten all my narrowband. Very interesting region. This is one 5-minute sub with my IDAS NBZ filter on my ASI533MC pro. Love seeing the crescent nebula this far out, in its ocean of other stuff. #astrophotography #astrodon

ryderdavid 🔭🚲🪐🌌Aug 30, 2023

Spent a bunch of time over two nights tuning up my new Rokinon 135 f/2.2 (cine version) lens on my ASI533MC Pro - I think I ended up with a lucky one -- really sharp at f/2.2 after some tilt tuning and shimming! Maybe still the tiniest back focus issue but I kind of don't want to rock the boat! Going to shoot wide open with it tonight and see how it goes in a stack. This is a single 60s sub at f/2.2 of the crescent nebula. #Astrodon #astrophotography

ryderdavid 🔭🚲🪐🌌Aug 26, 2023

Because I am not a normal person, we got home from the Beyonce concert and I set up my new widefield lens at 1AM to shoot while I slept, because it was the first clear night in weeks if not a whole month.

Shot M31 on my new second hand Samyang 135mm, which has good stars at f/2.8, but still tuning backfocus and tilt on it. Still, fantastic first light 2x+ faster than my refractor, so great for these quick single night shoots! Can't wait to get it all dialed in. #Astrodon #astrophotography

ryderdavid 🔭🚲🪐🌌Aug 26, 2023

Dr Sam Morrell Aug 25, 2023

Hello, Mastodon! I’m an astrophysicist at the University of Exeter. I work on applying astrophysical methods to understanding the ecological impacts of artificial light at night #ALAN. I’m also currently working on stellar characterisation.

As The Bad Place is becoming increasingly hostile, I’m trying to share what we're working on a little more widely, so please do follow-along if you are interested in light pollution, (astro)physics, or the life of a researcher at #Exeter. 🙂

ryderdavid 🔭🚲🪐🌌Aug 22, 2023

Realize I never shared my latest work on here!
I spent 2 wks before monsoon season in #arizona shooting the Cygnus Loop in a 2x2 mosaic with my 334mm focal length refractor and ASI533MC pro camera. Wish I got more integration, especially since this was done in Bortle 7, but at 57 hours total (~14 per pane) this was quite an endeavor as is! Hope to add to it another year.

First full project shot on my AM5 Mount.

Full version: https://www.
astrobin.com/gbeqdh/H/

#astrophotography #astrodon

ryderdavid 🔭🚲🪐🌌Aug 19, 2023

Catherine Ryan Hyde Aug 19, 2023

And here's the same target in wide field, through the 70mm Tele Vue scope that was recently gifted to me. I had one scope mounted on top of the other and was using two cameras at the same time, which is a very fun thing to be able to do.

ryderdavid 🔭🚲🪐🌌Apr 18, 2023

Pete Kockritz Apr 17, 2023

Markarian’s Chain is named after the Armenian astrophysicist Benjamin Markarian. The galaxies in it are approximately 50 to 55 million light years from earth. This group appears in the Virgo Cluster. Total exposure time was 6.3 hours.
#Astrophotography
#Redcat51