Single 30 second shot at 200ISO. No filters, unguided. Canon T7 DSLR. Meade LXD75 Schmidt Newtonian-10″, Skywatcher EQ6-r. Cleaned up with GIMP.
Bortle 7 sky. I have been using the Optolong L-Pro lately but I wanted to see results with an unfiltered optic train. No filter tonight. 10″ Schmidt-Netwonian. I am finding out the hard way that I need to start using flat frames to prevent vignette.
A shot of Sadr: 6 lights @ 120sec, 3 darks. Canon T7 DSLR, Optolong L-Pro filter. Meade Schmidtt-Newtonian on Skywatcher EQ6-r mount. Unguided.
In constellation CEPHEUS. 30 – 90sec lights @ 800 ISO. One dark. 10″ Schmidt-Newt w/ Cannon T3. Optolong L-Pro filter.
Stacked with Nebulosity, edited in GIMP. I need more images (more data) to get a better (and more detailed) image.
In constellation CEPHEUS. 10 – 20sec lights @ 800 ISO 10″ Schmidt-Newt w/ Cannon T3. Optolong L-Pro filter.
First image of the Bubble Nebula. Edited in GIMP. I need more images (more data) to get a better (and more detailed) image.
I have been digging out old images and re-editing them. This image was captured via Observing with NASA – a public education site in which one can send schedules to robotic telescopes in Arizona and obtain selected images via email. This is a project in collaboration with Harvard University and is part of the MicroObservatory Robotic Observatory Network. This is used in primary education. I have used it in the past.
Here is an old image of the Crab Nebula from ten years ago that I have edited in GIMP.
Messier 13 or M13, also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of several hundred thousand stars in the constellation of Hercules. (Wiki https://en.wikipedia.org/wiki/Messier_13)
120sec x20 @ISO800, AND 30sec x20 @ISO1600. Optolong L-Pro. DSLR. sn-10 OTA.
M57 – The Ring Nebula. 30sec x20 @ISO800. Optolong L-Pro. DSLR. sn-10 OTA.
Getting better at using the dark light levels in GIMP.
The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a star in the last stages of its evolution before becoming a white dwarf. (Wiki https://en.wikipedia.org/wiki/Ring_Nebula)
M27 – The Dumbbell Nebula. 30sec x20 @ISO800. Optolong L-Pro. DSLR. sn-10 OTA
The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1227 light-years. This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes. (Wiki https://en.wikipedia.org/wiki/Dumbbell_Nebula).
*IC342 spiral galaxy in Camelopardalis
*NGC 869 double cluster in Perseus
*IC 348 star-forming region in the constellation Perseus
10″ Schmidt-Newtonian telescope with Canon T7 DSLR w/ Optolong L-Pro.
Using GIMP to process images. I have not yet become skilled in gradient removal but I am improving somewhat. Here are some rough Ha images of IC1805 combined with images taken with the Optolong L-Pro filter: my first attempt at stacking different images with at various wavelengths – I do see the advantage of this; however primitive my process is now. Some of these images are sharpened; but I do prefer the un-sharpened images. BTW: Shooting with Canon T7 DSLR: 180sec, 1600ISO. Telescope: Meade LXD75 SN-10.
So what’s next? I will continue to learn with this object IC1805. My next exposures will have a lower ISO setting to bring down the brightness that is causing the vignette – 180 or 300 seconds with ISO 800 (using the Optolong L-Pro), and the same with the Ha. Anything higher than ISO 800 is just too bright with the light pollution at my location. I have been considering trying out the Optolong L-enhance filter: https://youtu.be/b1yVLG1q6Sc
Next target: IC1805. I have started to image this nebula in Ha the other week. I have decided to switch filters over to the Optolong L-Pro – a multiband filter in OIII (496 nm and 500 nm), H-beta (486 nm), NII (654 nm and 658 nm), H-alpha (656 nm), as well as SII (672 nm).
I use this filter frequently, as my location is at a Bortle 7 – high on the light pollution scale. I do aim to have my images completed this month in August 2020.
Shooting in Hydrogen Alpha. I am finding out that to get a good image (particularly in narrowband) one has to take a LOT of images. Here are a couple for a start. The first is IC1805 the Heart Nebula in Cassiopeia. While a large number of additional images are needed to create a descent stack, we can start to see the detail in the heart IC1805. I also stacked about 15 lights of M57 for some fun. Canon T7 DSLR: 180sec, 800ISO.
I plan on shooting in Ha and OIII. Shooting in Hydrogen Alpha and Oxygen III will bring out the fine details of these planetary nebulae. The Moon is waning but these filters should cut out that ambient light.
As the Northern part of the sky is the most accessible from my location in my little neighborhood, filters are a must.
Using the Mead LXD75 sn-10 with Skywatcher EQ6-r.
Cats eye nebula in Draco (c6/ngc6543 9mag) in Ha and OIII.
Owl nebula in Ursa Major (9.90mag M97) in Ha and OIII. I have imaged this often, but never got a decent image, and there is so much light pollution in this location. These filters and image stacking should fix that. See: https://astrodonimaging.com/gallery/the-owl-gets-a-halo/
IC3568 Lemon Slice in Ursa Minor. Mag 11.10.
I am beta testing the new WiFi nFocus from Rigelsys. I have set it up on the Celestron C6. The people at Rigelsys have worked with me to find the right fit for the C6 focuser base and have sent out this one. It installed easily with two screws and I am controlling it via the on-board PC: I use remote access to the PC via Windows RDP.
I use APT (Astro Photography Tool) for my imaging and via ASCOM, the nFocus interfaces well with APT. Upon connecting to the focuser in APT, it calls the installed nFocus software.
For an official announcement from Rigelsys on this new WiFi nFocus product, see this link to CloudyNights.com here.