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By Space Bat
Well with much deliberation and stalling whether to switch from DSLR to dedicated astro camera, I have today took the plunge and purchased a ZWO 1600 MM Pro bundle with wheel & filters pictures included. This means now with going to a dedicated guide setup I have the following for sale.
Everything is in excellent condition.
Celestron Off axis guider £100 ono. SOLD
12NM Astronomik EOS clip filter set Ha, OIII, SII £300 for set.
Collection or shipping costs dependant on requirements of purchaser.
Not keen to split filter set at this point. PM for details.
Last weeks catch, the Needle galaxy, ngc 4565.
Skywatcher BK MN190 DS on AZ-EQ6 ZWO ASI174MM-Cool at -20 C and gain 20, ZWO LRGB filters Guiding: ASI120MM with ST80 and PHD2 Software: INDI Ekos/Kstars for capture and PixInsight for processing.
Exposures: L: 50 x 2 minutes, RGB 20 x 4 minutes / channel (340 minutes total time)
The small fuzzy just above Ngc 4565 is IC3571, a satellite galaxy that interacts with the main galaxy. This interaction has caused warping of the larger disc. There is also supposed to be a very faint bridge between the two galaxies, but I haven't been able to find any image on line that confirms this.
We had a patch of clear skies last Sunday night, and even though it was bitterly cold (and there was ice and snow everywhere) I made the executive decision to get outside and have a go nonetheless. I have to setup and teardown each session, but thankfully I was able to move the car a few metres and take advantage of the nice dry (and ice free) ground underneath.
The plan was to grab some OIII data to go with the Ha I captured on the Heart Nebula a couple of weeks back (see link below) but all I could manage was 8 x 1200s before the clouds rolled in for good. In fact, 3 of the 8 subs were affected by clouds, but I decided to use them anyway as I figured it’s only going to get used for tone mapping, and not luminosity, and at such a short exposure time I really need all the SNR I can get. So I’m being a bit of a naughty boy by posting this before getting a decent amount of OIII first.
This is just a quick once-through process and is still missing some things, so it’s very much a work-in-progress at this stage, but I thought I’d post it anyway and I’ll update the thread as I make changes. So far, all I’ve done is process the OIII image (which involved gradient reduction, stretching, removing the stars then stretching some more, then quite a substantial amount of noise reduction). Then I combined it with the Ha image above in my usual manner, i.e creating a synthetic SII using 60% of the Ha image and 40% of the OIII image, and then combining all 3 using Annie’s Hubble Palette action.
So aside from some more work to refine the colour, I still need to work on the contrast, do some NR and also then finally some star reduction.
C&C welcome as always!
SW 80ED with FF/FR (510mm FL)
HEQ5 Pro Mount (belt mod)
11 x 1200s and 3 x 900s of Ha (2” Baader)
8 x 1200s of OIII (2” Baader)
30 Flats, 50 Bias. Dithered every frame.
Captured in SGP. Stacked in APP. Processed in PS.
Thanks for looking.
The Ha image:
Here's a quick WIP version of the Heart Nebula taken with my usual gear, the Nikon D5300a, SW 80ED, and HEQ5 Pro. So for this constitutes:
11 x 1200s and 3 x 900s of Ha (so 4 hrs 25 mins in total)
As usual, stacked in APP and processed in PS.
It's well placed here in the UK right now so I'm hoping to get some OIII in the coming weeks.
I'm never quite sure how much to process these images. Aside from the usual stretching, apart from a mild amount of deconvolution, sharpening, and contrast enhancement that's all I tend to do really.
I've also attached a false colour version using one of Carboni's actions.
C&C welcome as always.
Oh, and Happy Christmas everyone! (it's December now, it's allowed )
re-process of the heart nebula using fewer frames, love this object. Been away for a while due to work but now im looking forward to making some time at home to improve my imaging
had to get rid of 45 frames or so because they were rotated funny and I couldn't stack them in the last image i had posted
50 x 120 secs ISO 800, Modified Canon 50D on a GT81/EQ5 - really struggling to bring the nebula out even with the camera modified, tried my hardest with PI and PS. Nevertheless, happy with the resulting image
dropbox link for .tiff: https://www.dropbox.com/s/zxuo1gfwpno24in/IC1805TIFFPI.tif?dl=0