Broad(er)band vs. UV/IR Cut Filter on Pinwheel Galaxy SUPERNOVA With Celestron 6SE on a Wedge
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- čas přidán 28. 06. 2024
- Reviewing effects of SVBony UV/IR Cut Filter on M101 imaging in Bortle 8 skies while also revisiting Supernova SN2023ixf after 10 months. Imaging with a Celestron NexStar 6SE on a wedge and an ASI294MC Pro camera. #UV/IR #SN2023ixf #Supernova #Broadband
00:01:30 - Processing multiple nights' of data in Deep Sky Stacker
00:03:45 - UPPDMAT Sky Flats light pollution removal
00:07:30 - Processing M101
00:09:45 - Review findings with and without SVBony UV/IR Cut filter
00:13:33 - M101 before, during, and 10 months after Supernova SN2023ixf
Thanks for watching, and clear skies!
Equipment used in this video:
-----------------------------
Celestron NexStar 6SE
Celestron Focus Motor Celestron Motor Model # 94155-A
Celestron f/6.3 Focal Reducer Model # 94175
Celestron Wedge Model # 93665
Celestron Piggyback Mount-NexStar 5, 6, 8 Model # 93609
Celestron C8 Dovetail Base for Finder Scope (Generic)
Celestron T-Adapter for Schmidt-Cassegrain Telescopes Model # 93633-A
StarPal 40cm Dovetail
SVBony SV106 50mm Guide Scope
SVBony SV905C Guide Camera
ZWO ASI294MC Pro
Nikon D5200 with 18-55mm and 55-200mm lenses
Rokinon/Samyang 135mm F2 Lens
Astrodymium Mounting Bracket for Rokinon
UPPDMAT (Custom Made)
SVBony UV/IR Cut Filter
Telescope Control And Image Capture Software:
---------------------------------------------
CPWI
PHD2
Astro Photography Tool / APT
BackyardNikon
Post-Processing Software:
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DeepSkyStacker
Siril
GIMP - Věda a technologie
Very interesting video. I just ordered this filter.
I've been leaving it on by default unless I'm specifically using a narrow band filter. I was able to image the Whirlpool Galaxy last night with a full moon largely because of this filter. CS!
Супер👍
Thank you!
I’ve just started taking deep sky shots with my Meade LX90 8 inch (old 1990s/2000s model with UHTC) and I’ve seen exactly the same circles in my results and was concerned it may be a fault somewhere but now realise it isn’t, thank god. I’ve read a lot now on the issue and it would appear to be associated with using the f6.3 reducer. Did you use such?
Also, I couldn’t quite pick up what the name or type of flats you refer to taking. Can you state it in a comment? Ive tried using Graxpert and it has done a good job in removing a decent amount of what many refer to as a form of vignetting caused by the reducer which doesn’t happen at f10 prime focus.
Hi @earthling-fh2mg, I am using the f6.3 reducer. It could be that the ring would fall outside of the apparent field of view without the reducer. I'm using a type of sky flat I jokingly named UPPDMAT to negate much of their impact. I don't think I came up with the approach, but I have yet to come across anyone else having previously used it. The difference between UPPDMAT and typical sky flats is timing and duration. They are taken at the same time as your light frames as opposed to during the day, and they have the same exposure duration your light frames. I have since had feedback from others that this has worked for them as well.
UPPDMAT
czcams.com/video/uqJsSUXwcZM/video.html
Good luck and Clear Skies!
No filter and uv/ir filtration are both broadband..
Hi @AlexN-Astro, thanks for your comment - by using the term broadband, I meant to imply broader broadband than the narrower, less broad band range of spectra resulting from the UV / IR Cut filter.. Not to be confused with element (or molecule) specific narrow band filters.
A Uv/IR Cut Filter has nothing to Do with a lightpolution Filter. It only helps you with sharper Stars and a more in focus picture.
My actual experience says otherwise. Using a UV/IR cut filter not only increases contrast and removes star bloat caused by excessive ultra violet and/or infra red light above and below their respective wavelength thresholds, it also removes some of the sky glow I experienced due to city light pollution. It therefore follows that some non-trivial amount of sky glow was caused by errant municipal emissions in the UV and IR spectrum.
Here's a link to a National Library of Medicine / NIH article about light pollution in the UV and visible spectrum:
www.ncbi.nlm.nih.gov/pmc/articles/PMC3575508/
Also, I'm not sure if you watched the whole video, but I explained at length that what removed much of the light pollution was actually the use of a special type of sky flats.
I watched the hole video.
And i think you get bether in image processing.
In the first versions of your picture there ist a green tint. And the data is not as stretched as in the secound.
I tried it first with my 533mc without a uv ir cut Filter. And never had this Problems with colour. But my focus was terrible.
In planetary under best seeing you use a pass filter But i dont see this with deep sky.
Even zwo asi says you should use a uv ir cut.
I should hope so! At least I think my image processing has gotten better. If you look at the image of M101 post SN2023ixf I posted last June to the one from this video, there is quite a difference. Nevertheless, I did re-process last year's image for this video to make the comparison as fair as possible. You are welcome to look at the original stacks, their last modified dates show them as being from May of 2023, and Feb 2024 respectively:
drive.google.com/drive/folders/1O8A-_nyeAbMniqN_7FIk4eQ8IOwO6-J2?usp=sharing
Original SN2023ixf video:
czcams.com/video/_iQ-ZbacwGM/video.html
I had also posted a summary from last year's galaxy season, and all of the galaxies in that video suffer from the same lack of color:
Galaxy Season wrap-up:
czcams.com/video/8M1189XBbJA/video.html
This is apparent in any of my globular cluster captures pre and post addition of the UV/IR Cut filter. The post images begin to show the blue stars present in M13 and M15. In fact, if you look at the Crescent Nebula video I posted, the final image shows a distinct lack of color in stars as well, and a washed-out looking nebula.
There's just a drastic difference in color in all of the images I have taken before and after I began using the UV/IR Cut filter.
Taking the telescope out of the equation, look at Andromeda captured using a guide-scope without filters as opposed to Andromeda captured with a DSLR lens using the UV/IR Cut filter. Other than the obvious differences in quality and lensing, the colors of the stars are vastly different between both images.
Andromeda through guide scope:
czcams.com/video/y2CVm3BRInY/video.html
Andromeda through DSLR lens with filter:
czcams.com/video/LEaVgaST18s/video.html
The thought that the beige tinge and lack of color resulted from the wild fire smoke we had in my region last spring and summer crossed my mind, but the images of Andromeda were taken weeks apart.
I appreciate your comments, and understand where you're coming from, but the images speak for themselves.