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Quaternion

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About Quaternion

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    Nebula

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    U.S.A.
  1. I have a TV 5X Powermate that will reach 7.7X with enough backspacing.
  2. Quaternion

    Mars with new scope 5th August UK

    Wow. That is awesome !!!
  3. Hi, Here is my "final" attempt at processing Mars from 05 Aug 2018 at ~ 0500UTC. It was captured using the Orion XT10i setup in my signature, operating way out at F32 (8154 mm FL), just for fun. The seeing was 3/5 at best, and I only captured about 2500frames of which I stacked about 500 (20%) in AS!3. I had to work the data to get the low contrast features out, without too much edge rind. I used linked wavelets in Registax, deconvolution in Fitswork, and some local contrast enhancement, black point adjustment and a 70% downsize in Photoshop. I am happy to report that Firecapture 2.6 worked very well with the FlyCapture SDK and my FLIR Grasshopper 3, with its 2nd Gen Sony Pregius global shutter IMX250 sensor (FLIR GS3-U3-51S5C-C). Unfortunately, I did not know how to find the low noise 'Mode 7' option in Firecapture at that time, though from what I read it is really meant for longer integration times. I got my max frame rate up from a measly 4 fps from the ISS capture to 27 fps for the full 5MP frame, by simply turning off debayering. However, I still was not able to get the max full 5MP frame rate of 75 fps, despite the 10ms integration time (100Hz). I tried the tips Torsten gave me on increasing heap/ram buffer size, but they either didn't work, or I did not adjust them correctly. The other possibility is I have a 5yr old laptop that may not be up to the task of working with this high data rate camera. Next time I will try to use the Autoalign feature with a smaller ROI to increase the frame rate and SNR. Thanks for looking.
  4. Quaternion

    Cloudmaker Captures SpaceX Dragon On Approach to ISS

    Thanks for the compliments. Didn’t quite know where to post it...
  5. I thought the ISS had passed by a star when I saw the first image, but then I noticed it was in all the frames. You can just barely see the hint of the Dragon’s solar arrays. The scene kind of looks like a huge alien spacecraft about to swallow up our hero’s tiny spacecraft. This was the best 7 contiguous 0.25 ms frames stacked with AS!3, with a little sharpening, histogram stretching and cropping in PS. I am still learning how to use this FLIR Grasshopper IMX250 camera, and how to configure it with Firecapture and my laptop, because I only hit 4fps instead of 75fps, so I have lots of room for improvement in SNR (and focus/collimation). However, a comparison of this image with the one I took with my Canon 70D is proof positive of the dramatic reduction in distortion/shearing with a global vs rolling CMOS sensor. I had the trials of Job taking this image. After precisely collimating and focusing, everything dewed over including the primary (have DewBuster on order...). So I ran inside and got my wife’s hairdryer (she was still using it ) and an extension cord and took care of it. Then on my practice slew, I noticed I needed more room to stand on my concrete sewer slab, so I lifted and moved the Cloudmaker. BIG mistake, lost collmation and spotter/primary co-alignment with 5min before the pass. With the sun coming up, Polaris was gone so I did my best to co-align on a lunar crater and then Mars as they drifted by...all with about 30sec to spare. Whew !!! I didn't have any time to reset the focus and collimation, so they are a bit "soft", but I've had worse first light attempts.
  6. Quaternion

    A Magnificent Saturn.

    Incredible detail, color and image scale, with very little noise. Do you proces the rings and disk separately? How many frames did you stack? Thanks for sharing.
  7. Quaternion

    insight-astronomy-photographer-year

    Congratulations !!!
  8. Quaternion

    Saturn 30-08-17

    Same Orion XT10i, TV 5x Powermate, Baader UV/IR Cut Filter, ASI224MC, PA-ADC, Homemade EQ Platform
  9. Quaternion

    Saturn 30-08-17

    Awesome. The color has definitely improved. I went from the first image (2016, 30deg)to the second image (2017, 29deg) with a PA-ADC, though I've also gotten better at my planetary imaging techniques ( see Polar Hexagon post)
  10. Quaternion

    Saturn (IR-RGB) 5 July 2017

    Very nice. I ca definitely see a hint of Enke's Gap and the C-ring. I've never tried my 610nm on Saturn with the ASI224MC. Maybe it is worth a shot. Thanks.
  11. Quaternion

    Saturn 30-08-17

    Nice !!! If you look closely at your image, you'll notice a red fringe on the bottom of the rings and a blue fringe at the top. You can use a Pierro Astro or ZWO atmospheric dispersion corrector (ADC) in the imaging chain to help eliminate this at your low elevation angles. While not perfect, you can also use the RGB Align function in Registax to do this with your existing data.
  12. Increased the saturation on Saturn by 67% to improve the color rendition of the ZWO ASI224MC camera.
  13. Thanks. It was at 29deg here in Virginia, USA. However, I have never seen the Northern Lights ...
  14. Excellent seeing enabled me to capture my sharpest image yet of Saturn on Aug 1st. You can clearly see the A, B, and C rings, Cassini's Division, a hint of Encke's gap, cloud bands on the planet, and the shadow of Saturn on its rings. I also managed to resolve the odd hexagon shaped storm on the North Pole, which was first imaged by the Voyager spacecraft in 1981. I made a polar projection plot from the data, with some WinJupos help from Kokatha Man, so you can sort of look down on North Pole to get a better view of the Hexagon... maybe that's where the Saturnian military headquarters is located I've also included a shot of my Orion XT10in Dob, a.k.a. "The Cloudmaker", riding on my home made EQ platform, a.k.a. "The Sky Slower"
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