Recently Browsing 0 members
No registered users viewing this page.
I've been processing this image for quite a long now.
I started acquiring data the last season when I only managed to shoot 3 panels with the Canon 6D through the Esprit 80 for a total of ~7h.
This season I restarted and I added more data and covered a wider area. So a mix of portrait and landscape panels were planned and shot with the same scope and camera. Now every pixel represents at least 3-4h of integration, some have more.
All the above were shot from Bortle 2-3 sites where I traveled sometimes even for an hour of exposure.
To the RGB data I added 17.5h of Ha, same story with the panels. Some were oriented N-S, others E-W. These were shot with the SW 72ED and the ASI1600 from home and Bortle ~7.
Then I figured out I still had time and I planned and shot 9 more panels of luminance with the 72ED and ASI1600, each consisting of 1h of exposure.
I combined all of these into an image, processed it and for the Orion nebula and Running Man nebula I also blended some data I shot last season with the 130PDS and ASI1600 from home.
Below it's my first final version of all data combined. You can watch it in full resolution on astrobin: https://www.astrobin.com/full/jni0w8/ or Flickr: https://flic.kr/p/2iBGUXq
Have decided to sell my trusty Equinox ED80 refractor. Sharp optics, smooth two-speed Crayford rotatable focuser, fitted with a finder shoe, and complete with the original Skywatcher case and tripod-threaded mounting bracket. A 3D-printed Bahtinov mask is included, along with a pair of mounting rings and a Losmandy dovetail plate.
Collection preferred (Sussex coast, not far from Brighton), payment by bank transfer or cash on collection.
Looking for £325.00
I was wondering whether it's possible to image a DSO and capture any depth. Every 3D astro image online is faked so at the start of the year, I decided to image M42 six months apart.
Back in March I posted a image of M42 imaged at f10, 2032mm FL through my 8SE on 28th February 2019. Than on 3rd September (setup and captured 15 second subs on 1 September) I captured M42 at the same focal length, same orientation and very similar subs for a total exposure of 1 hr 24 minutes. This was almost to the day exactly 6 months between the two images, so the earth was 300 million km away from the original position on the other side of the sun, furthest I could hope for imaging a 3D stereo pair.
First attached is the image from September...
I color matched the above image with the image from February, aligned them and below is the end result....
As you can see there is no detectable 3D effect... There was a 3Dish effect but this was most likely due to the differences in processing of the two stacks and when I SCALE and rotate the two images to align them, and hence no 3D effect.
Of course the stars and nebula are certainly not on a flat plain so I believe that the reason for the lack of any discernable depth is simply due to the distance of M42 resulting in a very small angular shift in the stars, so small in fact, that it’s beyond the sensitivity of my 8” SCT, camera pixel resolution and tracking accuracy of the CGEM.
Calculation of the expected motion of any parallax shift when the Orion Nebula is 1344 lightyears away and the distance of Earth being 149,600,000km from the Sun:
1344LY = 1.2715e+16km
Θ° = Tan-1(149.6e+6/1.2715e+16)
Parallax Shift Θ” = 2 x 3600 x Θ
Parallax Shift Θ” = 0.0048536712567150
An angular motion of 0.005” was not picked up by my system that tracks with an average accuracy of about 1” RMS, with a camera sensor that has a resolution of 1.16”/pixel at 2032mm focal length with a 8” SCT. Even if I could get consistent tracking at the best accuracy that I have ever seen with my gear, 0.38” RMS, this is still well above 0.005” and well beyond the 40D sensor pixel resolution, and all this is without considering atmospheric distortion, obviously my setup is not even close to sensitive enough.
This was a good project but unfortunately the distances of objects in the universe are too great, even objects classed as in our celestial “backyard”. If I didn’t try this experiment than I would be always wondering and curiosity would most likely make me try it eventually.