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I don't expect any replies - think I'm just braindumping for the mental wellbeing aspect of a frustrating night.
Having been ill through the week, Saturday found me feeling well enough to get outside and see if I could hook some things together and try to get FirstLight through some of my recent purchases. I've been using my Star Adventurer mini-rig [SA non-wifi, Canon 200D (unmodified), >30yr old Tamron 200mm f3.5] but knew things were going to be very different, and was keen to get going.
So the kit was all lined up:
> Laptop (Win10), Raspberry Pi4 with Astroberry
> EQ6-R Pro
> SW 80ED-DS Pro (Kit), SVBony SV106 190mm/50mm Guide Scope
> ZWO ASI 224MC, Canon 200D, SVBony SV205, 7TC ASI 120MC clone
> USB GPS Dongle (G72 G-Mouse Glonass Beidou GNSS) for location
and mains power for all via various PSUs with enough USB cables to circle the planet
Didn't take too long to get both Win10 (ASCOM) or Astroberry (INDI) talking to the mount and progress was being made - RA/DEC all seemed fine so onto the cameras. Found a distant object and SharpCap gave me images for all three USB devices once I had the SVBony as a Windows WebCam (RESULT!) and the same through INDI on the Astroberry, all three displayed images when enabling Streaming.
Settled on EQ6-R, SW 80ED, ASI224MC for imaging, SV106/SV205 for guiding
That's it (I thought!) and I broke down the rig and moved it to the lawn - I say lawn, more like a mossy bank but serves the purpose - and wait until dusk where a simple Polar Align and I'll be grabbing images of M51 Whirlpool in no time ...............
(I must cut the lawn, even if just to get rid of the blue from spray-painting a new table a couple of weekends ago)
(please ignore the middle dew heater, was there to remind me to put it on the guide scope later)
PA on the Star Adventurer, 30mins (5mins for the alignment, 5mins for remembering which phone app has a PA Clock and the obligatory 20mins to find the flamin' polar illuminator!) - this has been giving me consistent 5min exposures with no trailing.
PA on the EQ6-R is 'interesting' - I have a QHY PoleMaster but am waiting on the adapter from FLO (stock issues) so it was SharpCap alignment.
Wait for it to get dark enough, then get focus, then wait for platesolving in a "change exposure, gain, star threshold, black threshold, platesolve again" loop for over an hour. Woohoo, plate solved ..... oh, rotate around RA ..... and perform the same operation again ..... ARGHHH!
Over two hours later (probably more like 3hrs+) I've got polar alignment to within 12 seconds (wishing I'd screengrabbed that now). I really don't like the adjustment mechanism, the thread pitch is far too high for minute adjustments of alignment!
And onto guiding ........................ or maybe not.
PHD2, Nothing through it at all .... then remembered I'd not refocused the guide scope, then it was taking the Darks library. Still nothing. Opened the SV205 via SharpCap and got focus, switched back to PHD2, still nothing ...... hmm, is this just an unsupported camera (windows 'webcam'). So switched out for the 120MC copy - Amazon 7TC special.
Repeated the SharpCap for focus, then PHD2 Darks library and BOOM I have stars showing up in PHD2 - RESULT ...... I'll leave it at that for a moment and try looking at something, see what I get from the 224MC main camera and what PHD2 gives me in the guide scope.
So onto the next 'learning opportunity' - target selection
Erm, how do I select a target for goto with just two camera apps .... aha, Stellarium
No Telescope selected, easy - it went something like this:
"Open Stellarium, select telescope, select ASCOM ... there we go ... nope, it won't connect ... restart everything (twice) ... redo settings (twice) ... check ASCOM diagnostics (all passed) ... quick google search, aha I'm not the only one, you have to select the scope within the options pane ... what options pane .... oh, scroll down ..."
And I now have Stellarium control of the scope - again a RESULT - it's taking time but I think I'm making progress here .... hmm, it's getting bloody cold, wow, it's midnight!
So I now have an in focus 224MC, an in focus guide scope and control over the mount, here we go ... I'll be stacking images in the morning and making millions from selling prints online
Easy targets for testing were below the horizon (basically M42) so I'll just pick Vega and make sure slewing works, imaging works and can see how guiding works.
Nothing, no bright star at all - okay, bigger target - the moon.
Again nothing, no bright screen - so switched out the camera for a 26mm LER EP and a diagonal and manually aligned the moon - then, and here comes stupid, refocused (!) for the moon.
Stellarium wasn't syncing with the mount - I was 'off' on any selected target and by a lot
Quick google search and I'm no the only one - no sync points on my clean build so wasn't that, but use of the GPS dongle for location and TIME might be the problem.
And at this point it as 2:30am - prime viewing time last night with the moon disappearing in the West behind me - the garden slopes due-West to due-East so I only get Partial-North>East>Partial-South viewing.
Time to give up, have a small glass of Red and look for more things to buy on SGL/Astro B&S.
Today - well I had to break everything down to get it into the garage (too heavy to carry as one with current health) - I'll try to get the ASCOM/GPS element sorted out and maybe this evening try some targeting/lunar rate tracking so see if that major element is resolved.
And, if you've made it this far, please accept this for your perseverance🎖️, you've earned it.
Below are consecutive raw pictures if the ring nebula I took with my canon 600da and RCT 8" with neq6 pro guided with sharpcaps polar alignment procedure on the 15th of this month at 1am. I have 20 of these all 1600 iso auto wb 2 minute exposures. The problem will become apparent when you closely examine them, tracking is almost completely broken. I only stacked about 8 of them as most of the frames are unusable, some are star trails, some are commas and some are double exposures. This has become standard and getting worse since I tampered with my mounts gears and backlash adjustment. I have never been able to get consecutive 3min exposures on this mount, and I got it new 6 years ago, and only used it less than 30 times. I have spent roughly 20 hours trying to get rid of the backlash, coffee grinding noise and knocking when I press the directional keys to no avail, when the keys are pressed I notice the image wobbles violently. The go-to is also not working to 100% efficiently, I have to do guess work if I want my image centred.
Not sure what topic to put this in but I've been struggling with deep sky stacker, because of my optlong ccd light pollution filter most nebulas come out one shade of red, for example the Monkey's head nebula, see attached example. Dumbell and ring turned out as seen online and Stellarium. All 3 images were taken with a rct f/8 and a canon 600DA. I've never tried these objects without the filter as I got new equipment and this is the most active I've been in my hobby for many years. I'm not spending hundreds or thousands on software so preferably if i can get the correct colour on these with dss or some other free/semi free software that would be great. Thanks
I've been trying to image a couple of galaxies per night, one pre and one post flip. On early Saturday morning at 1:30am I changed over to M82, and acquired 63 x 3 mins subs, OSC, totalling 3 hours and 9 minutes of data.
Camera: ZWO 2600MC at -10 deg C, gain 100, offset 50
Telescope: Skywatcher 250PX (blue tube), 1200mm F4.7
Mount: Mesu e200
Guiding: ZWO OAGv2, 290MM, PHD2
Software: APT for capture, APP and PS for processing
I havent really had a chance to get much use out of this camera since I bought it in December, and I havent processed many OSC images before. I've a bit of work to do, but still very happy with the quality of the data for just 3 hours of integration time. I would like to add some Ha to this, but purposely didnt bother during the recent clear spell, as it was moonless nights and I gathered some broadband data on other targets instead.
After a 20 year long hiatus - my last astrophoto was captured with a film camera in 1997 - at the beginning of 2020 I decided it was time to start again.
So, January 25th 2020 I brought home my used Sky-Watcher NEQ6 Pro and I immediately started taking photos. Obviously, my first target was M42 in Orion.
This was my first digital astrophotography. 31 subframes, 30s each, taken at ISO800 with my unmodified Nikon D90, Nikkor 70-300mm at 300mm f/6.3 - January 28th, 2020, home front yard, Bortle 5/6 sky, no guiding, no filters. A grand total of 15.5 minutes...
A couple of weeks later, me and my wife went to spend Valentine's weekend in the mountains. Of course I couldn't avoid taking advantage of the Bortle 4 sky and I took all my gear with me. Same target, 52 subframes, 45s each, taken at ISO800 with my unmodified Nikon D90, Nikkor 70-300mm at 300m f/5.6 - February 14th, 2020, Tonadico, Bortle 4 sky, no guiding, no filters. 39 minutes total integration.
After I finished post-processing the second photograph, I was so happy with the result. It felt amazing that I was able to capture so many details and more nebulosity compared to the photo taken from home.
Months passed, gear was changed. First one being the camera: at the end of February I bought a Nikon D5300 and a couple of months later I astromodified it on my own, adding a UV/IR cut filter in front of the sensor, after cutting it to size.
In October the rest of the setup finally arrived: Tecnosky 80/480 APO FPL53 Triplet OWL Series imaging telescope, Artesky UltraGuide 60mm f/4 guide scope and ZWO ASI 224MC guide camera. Also, an Optolong L-Pro 2" light pollution filter.
After months of imaging and getting more experienced with PixInsight, it was just a matter of waiting before I could have another go at one of my favorite targets. And maybe give it a little more justice.
This project took me more than a month, due to the rare clear nights opportunities I have had here lately.
I started acquiring in January and finished a couple of weeks ago.
M42 taken over 8 nights, under my Bortle 5/6 sky.
Total integration time: 18h 04m 00s for the nebula. 714s (14s subs) + 2065s (35s subs) for the Trapezium and the core.
Here are the acquisition details:
Mount: Sky-Watcher NEQ6 Pro
Telescope: Tecnosky 80/480 APO FPL53 Triplet OWL Series
Camera: D5300 astromodified
Reducer/flattener: Tecnosky 4 elements, 0.8x
Guide-scope: Artesky UltraGuide 60mm f/4
Guide-camera: ZWO ASI 224MC
2021/01/12: Number of subs/Exposure time: 33@300s. Notes: L-Pro filter, no Moon
2021/01/13: Number of subs/Exposure time: 33@300s. Notes: L-Pro filter, no Moon
2021/01/15: Number of subs/Exposure time: 38@300s. Notes: L-Pro filter, Moon 8% illuminated
2021/01/18: Number of subs/Exposure time: 36@300s. Notes: L-Pro filter, Moon 30% illuminated
2021/02/13: Number of subs/Exposure time: 30@300s. Notes: L-Pro filter, Moon 4% illuminated
2021/02/14: Number of subs/Exposure time: 23@300s. Notes: L-Pro filter, Moon 9% illuminated
2021/02/15: Number of subs/Exposure time: 51@14s + 48@35s. Notes: L-Pro filter, Moon 15% illuminated
2021/02/17: Number of subs/Exposure time: 11@35s + 38@180s + 1@300s. Notes: L-Pro filter, Moon 30% illuminated
Total exposure time (main integration): 65040s = 18h 04m 00s.
Total exposure time (35s integration): 2065s.
Total exposure time (14s integration): 714s.
Pre and post-processing: PixInsight 1.8.8-7.
Full HDR Version:
Masked Stretch Version:
Blended Version (50% HDR + 50% Masked Stretch):
To my personal taste, I like the blended version the most. I think it brings out the best of both worlds (HDR and soft, less contrasty but more colorful look).
I must say, I am very pleased and happy with the result. Not to boast, but I think I have come a long way since I started.
Obviously the better gear and the much, much longer integration time helped.
I think I actually spent more time post-processing it than acquiring it. Especially since I had to do the work almost twice: I post-processed the HDR and the Masked Stretch images separately, making sure I used the same processes and with the same strenght in both, so that I could combine them effectively, if I decided I didn’t like the look of the HDR alone. I also think I managed to tame the stars a lot more, compared to my previous post-processing attempts.
As usual, here’s a link to the full resolution image(s): Orion Nebula (M42), De Mairan’s Nebula (M43) and Running Man (NGC 1977)
Thanks for looking!