Hi all,

I have built an L-RGB combination from luminance data shot with the ASI1600mmp (414 x 15s) and existing RGB data comming from my K3ii (100 x 180s ISO 800). I drizzled the luminance 3x in APP and processed the result in PS. Then I registered the K3ii color data on the luminance image and combined the two in PS. Finally the image was scaled down to its original size. This is the result:



Full scale on Astrobin:


Pete

Wow, Pete. What a stunning image! 3x drizzle needs a *lot* of frames to make the compute worthwhile the LRGB seems to work out just fine.

Jack

Hello Jack, using 30s luminance exposures I had enough frames for the drizzle. The full scale drizzle image (about 5,300 x 5,200 Pixels) showed even more and smoother details than the rescaled image I finally uploaded. I had tried drifzzling once in a while over the time. In most cases it did not deliver better results but in some cases it surely did. Often drizzling resulted in a more "blocky" upscaled noise that was hard to handle in postprocessing.

Pete

Beautiful, Pete. I'm curious -- why the short exposures in luminance? Were you that close to full-well star blowouts? I didn't think your observatory fought all that much light pollution.

Good morning Rick,

no it had nothing to do with full well problems or light pollution. We have a guy in our german astro forum whose username is 30sec who says the shorter the sharper. This guy started a project to collect all images of M64 the forum collegues could produce to render a giant compilation with hundreds of hours intergration time.

Astrotreff - Astronomie Treffpunkt - M64 Gemeinschaftsbelichtung ?

M 64 is quite bright. And I wantet to set my focus on the core. So I tried out the short exposure for the first time just to see what comes out of it. And for the core it worked fine.

The M 64 project is on its way and shows very promising results. An in-between version shows very good detail of the central clouds and even good structures in the galaxy plane that I never saw before. The image in not disclosed yet because we still gather exposure time.

Cheers
Pete