Recently Browsing 0 members
No registered users viewing this page.
Hi, I just published a video of how I am cleaning my filters - I thought I might do this while my telescope is back at service due to some kind of astigmatism.
How do you guys clean your filters? it seems that every dust particle finds it way to the filters just as you are done cleaning them, and to sit in a damp bathroom seems kind of a mess...
Anyway, here is the video
I've been less active lately in this hobby, but I've a few images done, others waiting in the pipeline to be processed.
This is a "crowded" area of our Milky Way galaxy, visible all summer from the northern hemisphere. The Cygnus constellation is home of many named and nameless nebulae.
Starting from the left (North), below the brightest star, Deneb, the Pelican and the North America Nebulae are very popular; going to right, just below the brightest star close to the center of the image, Sadr, lies the Gamma Cygni Nebula. A bit towards the top-right there's the Crescent Nebula and going forward top-right, there's the Tulip Nebula. Finally, at the bottom-right corner, the Veil Nebula, a super nova remnant.
All these are surrounded by shiny gaseous filaments or dusty patches blocking the light.
I started this during the pandemic lockdown. All of the data was captured from my hometown from a balcony brightly lit by a sodium street lamp, but the narrowband filters did their job well, blocking successfully the sodium emission.
A total of 23 hours is made of 2x3 panels composed in a larger mosaic, each panel consisting in about 1h of exposure for the red Hydrogen and 3h of exposure for the cyan Oxigen, all through a Sigma 105 macro stopped at F/4, ASI1600MMC with 6nm Astronomik filters.
I'm planning to shoot RGB data too and make an RGB/HOO composition.
Cheers and clear skies!
astrobin link: https://www.astrobin.com/r22yre/
flickr link: https://www.flickr.com/photos/170274755@N05/49939128338/
Recently I decided to open up my wallet widely and go Narrowband...
And before my set up comes, I decided to check how to process NB images.
The last half a year was mostly cloudy so I started playing around with Hubble TelescopeRaw Images
If someone will decide to kill some cloudy evenings in the same manner,
Hubble Telescope raw images are freely available on Hubble Legacy Archive https://hla.stsci.edu
And please also share your results on this forum.
My first pancake below - "Pilar of Creation" (part of it) combined in Pixinsight.
(M16-P1 - [Used Images: hst_10393_13_acs_wfc_f658n_sci & f502n_sci])
P.S. Raw Hubble Images are sooooo ugly... I was very, VERY pessimistic about my experiment initially
I shot my 1st full Bi-Colour NB image back in October/November of 2017. It was the Elephant Trunk Nebula, and at the time i remember having a hard time processing it to my own satisfaction.
Fast-forward 5 months and, well the weather is bloomin awful, lol, and the nights are now short, so i thought i would re-visit this in the hope i could do better now that i have a bit more PP experience under the belt.
The main differences this time (apart from rotating the image to frame it differently) are, RGB combination was done in APP rather than PS. The OIII signal was also given an x2 multiplier to help boost it (this meant i didn't have to give it a big manual stretch in PS). No HLVG has been done at all this time, as i now prefer to leave the Green in, as i think it adds more depth to an image, as long as it's not excessive. This has made a big difference i feel, as from memory i think i really went to town on removing the Green in the original version, and subsequently everything came out brown as a result. I also went with a smaller stretch overall compared to last time, although i did up the Vibrance quite a bit in the new version (i couldn't help myself). Overall though, compared to the original the new version has had a LOT less processing done to it. Whether that shows (or even helps) i'm not completely sure.
Still not 100% sure it's the best version of itself it can be, but overall i am much happier with the result. I actually didn't do any sharpening at all in this one, so i could possibly do something there.
C&C most welcome please. Have i gone overboard on anything? I had a hard time getting the overall brightness to a level i was happy with. When i thought i had it right, i looked at it the next day at work and on my phone and it looked way too dark, so i ended up cranking it up several notches as a result.
7 x 600s and 14 x 900s of Ha
17 x 900s of OIII
(just shy of 9 hrs in total).
50 Bias and 30 Flats
Combined as SHO. The SII was synthesized from a blend of 30% Ha and 70% OIII.
Taken with the usual gear: Nikon D5300a and SW 80ED scope on a HEQ5 Pro mount.
Captured with SGPro, pre-processed with APP and post-processed with PS.
Here's a link to the original thread:
And the latest version:
Hi SGL members!
As I'm moving to 2" filters I wish to sell my 1.25" mounted filter setup.
This setup consist of a kit of Baader LRGB as seen here for example:
https://www.teleskop-express.de/shop/product_info.php/language/en/info/p563_Baader-LRGB-CCD-Filtersatz-1-25----Interferenzfilter---4-Filter.html @268 Euros
plus the piece de resistance, the Astrodon 3nm ones; Ha, SII, OIII.
New they are 608 Euros a pop.... Example:
I will part with the LRGB set for £150 and the Astrodons for £450 each of £1200 for the lot of three. That is effectively most of the haggling done already.
These filters rendered me six AAPODs in one year alone, and that was with mediocre OTAs and substandard processing skills...
I can accept PayPal, UK or French, UK or European Bank transfer, I can ship from the UK or France, no problem as I tend to go back and fourth. Let's say £7.50 per filter shipping cost for insurance purposes. They will also be available for pickup in London shortly.
The filters have never been cleaned or wiped. They have lived in Atik Filter wheels as long as I had them.
Below: LRGB set to the left, Astrodons to the right.
PS There might be an ATIK EFW2 up for grabs too once these are gone ;-)