[Standard]

Image Stacking and Narrowband Processing in Affinity Photo

2 months ago
22
This tutorial on using Affinity photo for image stacking the production of SHO narrowband images. For this tutorial, we will be using one of the Pro Datasets of the Rosette Nebula obtained with CHI-4 telescope.
SPECIFICATIONS
Tutor .......................................................................................................................................................................................................................... Nik Szymanek
Parts .......................................................................................................................................................................................................................... 1 video
Duration .......................................................................................................................................................................................................................... 0h 27m
Level .......................................................................................................................................................................................................................... Standard
Software used .......................................................................................................................................................................................................................... Affinity Photo

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PART 1
Affinity Stack and SHO
2 months ago
22
PART 1

Affinity Stack and SHO

Comments

Wonderful video, and very helpful. Wondering if the workflow for LRGB would be similar to this?

Thanks,
Ash

Hi Ash.
Thanks! Glad it was of use. 👍
The LRGB workflow is pretty similar if you have the Affinity macros.
Check the PDF that came with them and there you'll find the instructions. You'll create a four layer image and from memory they should be labelled L R G B and then click on the LRGB Composition Setup macro. Ensure that you're working with a 32-bit image.
I'll post tutorial on this in the near future.
Cheers,
Nik

Thanks for the Affinity tutorial, Nik. Quite a lot packed into that program.
An item I am somehow missing, is the location of things like Macros, (Mentioned at timecode 14:03) and the Selective Color Menu (accessed at 17:45) prior to their being dragged onto the screen. Is there a "window" that simply doesn't show in the video?
A little niggle: I found myself losing track of your cursor. Maybe a bigger, brighter cursor? I'm guessing you work on a pretty good sized monitor. But in the video, that shrinks your cursor.

Hi Michael.
Thanks for the feedback.
I've posted the location to obtain the macros in an earlier message so hopefully if you scroll down the previous replies you should see the link. If not, let me know and I'll re-post it.
You can access the 'Selective Colour' menu by clicking on this : 'View > Studio > Adjustment'. It'll bring up a list of the available Adjustment tools (Selective Colour is about 2/3rds of the way down the list).
Thanks for the feedback re the cursor. I'd originally used a highlighted cursor for a few of the earlier tutorials but then decided to revert back to the standard view. I'll bear this in mind for future tutorials.
Cheers,
Nik

Hey Nik,

Thanks for this incredibly helpful video, I was really pleased with how much better this workflow worked for me. Is there any chance that a similar video will be made showing your workflow of an LRBG dataset from telescope.live? If so, I'm eager to watch it, and if not, are you able to fill me in on what you do differently for an LRBG workflow in AF? Thanks for any feedback!

Jason

Hi Jason
Thanks for the kind words and feedback on the video! 👍
I will be doing an LRGB video in the near future.
If you used the astronomy macros in Affinity there is also an LRGB setting that really streamlines the creation of LRGB files. It's pretty straightforward to use and there's info on how to apply it in the PDF that comes with the macros.
From memory, you just create a four layer image and name each layer L,R,G and B then hit the button and the macros compiles the image with appropriate scaling for each channel although occasionally the scaling is a little bright. It's much easier to use than the original procedure in Affinity that was preposterously complicated!
Hope this helps.
Regards,
Nik

Great tutorial, it gave me a lot of information on how to process the data, especially useful were the macros, a great resource and makes the process so much simpler - I wasn't aware of these and am fairly new to Affinity but it seems to be very feature rich now for astrophotography. Thankyou for imparting your wisdom and experience, it is very much appreciated.

Reply: 5

Thanks very much Neil. Really glad it was of use. The macros have transformed the ease of creating RGB and SHO images. It's great that a mainstream package like Affinity recognises FITS files. I suspect that most of the credit for this must go to James Ritson who is an Affinity employee and keen astrophotographer. I'm hoping that we'll see more astronomy-related tools included in future releases.
Thanks again for the positive feedback! 👍
Regards,
Nik

Hi Neil.
There are multiple macros available in the set, including RGB, SHO, LRGB, HOO, HSO. OSH and bi-colour combinations. The most useful macros will be the first three and they're pretty similar to use. James Ritson has written a PDF guide for each of the macros and this is downloaded with the macro set.
Cheers,
Nik