This is the first image I have taken from my new Observatory near Rylstone, NSW, Australia.
It started as an experiment using a Trius SX694 mono camera with Baader 2.5" filters and my TEC-140ED. I took 45 min in RGB (each filter) and was initially dissappointed with the image scale. I remembered owning an Astrophysics BARADV (barlow) and decided to experiment.
https://www.astro-physics.com/baradv
The setup is quite simple: The barlow was located 50mm from the CCD by mounting it on an extension tube just on the OTA side of the SX FW. The whole contraption goes into a Baader QuickLock that had a 2" Astronomik L filter. I removed the L filter from the Wheel.
My initial thought was to take a lot of luminance with the mono camera and then switch over to my Trius SX-694 color model for RGB. After taking 29 subs/5 min in luminance (through a 2" Astronomik filter) I had a look at the resulting luminance. I was impressed with the results which exceeded my expections given I was operating at essentially f14 and .5 arc-sec resolution. I think there is some advantage to imaging this way. The Luminance at f14 is far better than what I can see in the colour image at f7 (and both nights were inj good seeing).
The resulting image is a combination of RGB taken at f7 and luminance at f14. It is my first image in many years and was 99% processed in Pixinsight, also a first.
I'm interested to try this barlow with my TEC-180....
Thanks for looking!
https://www.astrobin.com/full/voc1ex/0/